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  • 101.
    Brandmaier, Stefan
    et al.
    German Research Center for Environmental Health, Germany.
    Peijnenburg, Willie
    National Institute for Public Health and the Environment - RIVM, The Netherlands ; Leiden University, The Netherlands.
    Durjava, Mojca K.
    National Institute of Health Environment and Food, Slovenia.
    Kolar, Boris
    National Institute of Health Environment and Food, Slovenia.
    Gramatica, Paola
    University of Insubria, Italy.
    Papa, Ester
    University of Insubria, Italy.
    Bhhatarai, Barun
    University of Insubria, Italy.
    Kovarich, Simona
    University of Insubria, Italy.
    Cassani, Stefano
    University of Insubria, Italy.
    Roy, Partha Pratim
    University of Insubria, Italy.
    Rahmberg, Magnus
    IVL Swedish Environmental Research Institute.
    Öberg, Tomas
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Jeliazkova, Nina
    Golsteijn, Laura
    Comber, Mike
    Charochkina, Larisa
    Novotarskyi, Sergii
    Sushko, Iurii
    Abdelaziz, Ahmed
    D’Onofrio, Elisa
    Kunwar, Prakash
    Ruggiu, Fiorella
    Tetko, Igor V.
    The QSPR-THESAURUS: The Online Platform of the CADASTER Project2014Inngår i: ATLA (Alternatives to Laboratory Animals), ISSN 0261-1929, Vol. 42, nr 1, s. 13-24Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of the CADASTER project (CAse Studies on the Development and Application of in Silico Techniques for Environmental Hazard and Risk Assessment) was to exemplify REACH-related hazard assessments for four classes of chemical compound, namely, polybrominated diphenylethers, per and polyfluorinated compounds, (benzo)triazoles, and musks and fragrances. The QSPR-THESAURUS website (http: / /qspr-thesaurus.eu) was established as the project's online platform to upload, store, apply, and also create, models within the project. We overview the main features of the website, such as model upload, experimental design and hazard assessment to support risk assessment, and integration with other web tools, all of which are essential parts of the QSPR-THESAURUS.

  • 102.
    Brandmaier, Stefan
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Sahlin, Ullrika
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Tetko, Igor
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    PLS-Optimal: A stepwise D-Optimal design based on latent variables2012Inngår i: Journal of Chemical Information and Modeling, ISSN 1549-9596, Vol. 52, nr 4, s. 975-983Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Several applications, such as risk assessment within REACH or drug discovery, require reliable methods for the design of experiments and efficient testing strategies. Keeping the number of experiments as low as possible is important from both a financial and an ethical point of view, as exhaustive testing of compounds requires significant financial resources and animal lives. With a large initial set of compounds, experimental design techniques can be used to select a representative subset for testing. Once measured, these compounds can be used to develop quantitative structure–activity relationship models to predict properties of the remaining compounds. This reduces the required resources and time. D-Optimal design is frequently used to select an optimal set of compounds by analyzing data variance. We developed a new sequential approach to apply a D-Optimal design to latent variables derived from a partial least squares (PLS) model instead of principal components. The stepwise procedure selects a new set of molecules to be measured after each previous measurement cycle. We show that application of the D-Optimal selection generates models with a significantly improved performance on four different data sets with end points relevant for REACH. Compared to those derived from principal components, PLS models derived from the selection on latent variables had a lower root-mean-square error and a higher Q2 and R2. This improvement is statistically significant, especially for the small number of compounds selected.

  • 103. Brandmaier, Stefan
    et al.
    Sahlin, Ullrika
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Tetko, Igor
    Stepwise D-Optimal design based on latent variables2011Inngår i: Posterpresentation vid SETAC Europe 21st Annual Meeting i Milano, 17-19 maj, 2011., 2011Konferansepaper (Annet vitenskapelig)
  • 104.
    Brandmaier, Stefan
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Tetko, Igor
    Öberg, Tomas
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    An evaluation of experimental design in QSARmodelling utilizing the k-medoid clustering2012Inngår i: Journal of Chemometrics, ISSN 0886-9383, E-ISSN 1099-128X, Vol. 26, nr 10, s. 509-517Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A reliable selection of a representative subset of chemical compounds has been reported to be crucial for numeroustasks in computational chemistry and chemoinformatics. We investigated the usability of an approach on the basisof the k-medoid algorithm for this task and in particular for experimental design and the split between training andvalidation set. We therefore compared the performance of models derived from such a selection to that of modelsderived using several other approaches, such as space-filling design and D-optimal design. We validated the performance on four datasets with different endpoints, representing toxicity, physicochemical properties and others.Compared with the models derived from the compounds selected by the other examined approaches, those derivedwith the k-medoid selection show a high reliability for experimental design, as their performance was constantlyamong the best for all examined datasets. Of all the models derived with all examined approaches, those derivedwith the k-medoid approach were the only ones that showed a significantly improved performance compared witha random selection, for all datasets, the whole examined range of selected compounds and for each dimensionalityof the search space.

  • 105.
    Bravo, Giangiacomo
    Università di Brescia, Italy.
    Alle radici dello sviluppo insostenibile: Un’analisi degli effetti ambientali di società,istituzioni ed economia2009 (oppl. 1)Bok (Fagfellevurdert)
  • 106.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    The Human Sustainable Development Index2018Inngår i: Routledge Handbook of Sustainability Indicators / [ed] Simon Bell and Stephen Morse, Abingdon, Oxon: Routledge, 2018, s. 284-293Kapittel i bok, del av antologi (Fagfellevurdert)
  • 107.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS). Coll Carlo Alberto, Turin, Italy.
    The Human Sustainable Development Index: New calculations and a first critical analysis2014Inngår i: Ecological Indicators, ISSN 1470-160X, E-ISSN 1872-7034, Vol. 37, s. 145-150Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The Human Sustainable Development Index (HSDI) has been proposed as a way to amend the United Nations’ Human Development Index (HDI) by adding an environmental dimension. Despite some attention in the media, the HSDI remained largely ignored by the scientific community. This paper aims at overcoming this issue by presenting an updated version of the index, based on recently available UN data, including a complete description of the procedure leading to its calculation and a critical assessment of its relation with some established environmental indicators. We found that, while the HSDI represents a step ahead from the HDI, it remains insufficient in its representation of environmental sustainability. A better equilibrium between social, economic and environmental goals is needed to reach a true index of sustainable development.

  • 108.
    Bravo, Giangiacomo
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS).
    The human sustainable development index: The 2014 update2015Inngår i: Ecological Indicators, ISSN 1470-160X, E-ISSN 1872-7034, Vol. 50, s. 258-259Artikkel i tidsskrift (Fagfellevurdert)
  • 109.
    Bravo, Giangiacomo
    et al.
    University of Turin, Italy ; Collegio Carlo Alberto, Italy.
    Tamburino, Lucia
    University of Padua, Italy.
    Are two resources really better than one?: Some unexpected results of the availability of substitutes2011Inngår i: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 92, nr 11, s. 2865-2874Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The possibility of exploiting multiple resources is usually regarded as positive from both the economic and the environmental point of view. However, resource switching may also lead to unsustainable growth and, ultimately, to an equilibrium condition which is worse than the one that could have been achieved with a single resource. We developed a dynamic model where users exploit multiple resources and have different levels of preference among them. In this setting, exploiting multiple resources leads to worse outcomes in both economic and ecological terms than the single resource case under a wide range of parameter configurations. Our arguments are illustrated using two empirical situations, namely oil drilling in the North Sea and whale hunting in the Antarctic.

  • 110.
    Bravo, Giangiacomo
    et al.
    Linnéuniversitetet, Fakulteten för samhällsvetenskap (FSV), Institutionen för samhällsstudier (SS). Coll Carlo Alberto, I-10024 Moncalieri, Italy.
    Vallino, Elena
    University of Torino, Italy.
    Cerutti, Alessandro K.
    University of Torino, Italy.
    Pairotti, Maria Beatrice
    University of Torino, Italy.
    Alternative scenarios of green consumption in Italy: An empirically grounded model2013Inngår i: Environmental Modelling & Software, ISSN 1364-8152, E-ISSN 1873-6726, Vol. 47, s. 225-234Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Any transition towards a more environmentally sustainable world will strongly depend on people’swillingness to adopt the best available practices. We present here the Consumption Italy (CITA) model, anempirically grounded agent-based model designed to represent household consumption in Italy and toestimate the related greenhouse gas emissions under different environmental policy scenarios. Weexplored the effect of a price increase for high impact goods and services (e.g., because of the intro-duction carbon taxes) and of a change of agents’ environmental concern (e.g., because of informationcampaigns). We found that both kind of actions can orient people consumption in the desired direction.However, their target and intensity should be carefully calibrated to produce significant effects at anacceptable cost.

  • 111.
    Brun, Christian
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Peltola, Pasi
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Åström, Mats E.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Johansson, Maj-Britt
    Department of Soil and Environment, Swedish University of Agricultural Sciences.
    Spatial distribution of major, trace and ultra trace elements in three Norway spruce (Picea abies) stands in boreal forests, Forsmark, Sweden2010Inngår i: Geoderma, ISSN 0016-7061, E-ISSN 1872-6259, Vol. 159, nr 3-4, s. 252-261Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The spatial distribution of 49 major, trace and ultra trace elements within a Norway spruce system was examined in three sites within the Forsmark area in central Sweden. The system included stemwood, roots, fresh green shoots, litterbags, humus, mineral soil, rhizosphere soil and moss. Based on Principal Component Analysis and manual plots the elements were grouped according to their distribution within the different compartments. One large group of elements occurring abundantly in the soil, and in much lower concentrations in the biota and litter was distinguished, containing mainly elements typically associated with soil minerals. A similar pattern was found for a second group of elements, but with higher concentrations in the biological samples and/or litter. In contrast, there was also one group of elements with high concentrations in biological samples and/or litter and low content in soil. This was mainly nutrients, but also the highly toxic Cd, Hg and Sb. This study is part of the site investigation programme, carried out by the Swedish Nuclear Fuel and Waste Management Company (SKB), in order to locate a suitable area for a deep repository for nuclear fuel waste.

  • 112. Brunold, S.
    et al.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Möller, K.
    Measurements of environmental stress conditions and evaluation for service life prediction2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 101-110Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 113. Brunold, S
    et al.
    Köhl, M
    Möller, K
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Accelerated indoor testing2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 175-196Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 114.
    Bröms, Elena
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Orsaker till Vattenaloes (Stratiotes aloides L.) omfattande utbredning i Limsjön, Leksand, Dalarna2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    Detta arbete handlar om Limsjön belägen i Leksands kommun, Dalarnas län. Limsjön är en del av Österdalälven som ligger i östra delen av kommunen. Området är en våtmark och omfattar cirka 95 hektar varav 25 hektar utgörs av sjön. Det är en betydelsefull fågelsjö, Natura-2000 och ett rekreationsområde. Sedan 2006 håller sjön på att växa igen till följd av etableringen av den flytande akvatiska makrofyten Vattenaloe (Stratiotes aloides L.). Stratiotes aloides L. har utvecklat en tät vegetationsmatta med cirka 80 000 000 individer (2017) som har ockuperat cirka 20 hektar av våtmarken. Om utbredningen fortgår kommer fåglar, vattenlevande organismer och ursprungsvegetationen i området att drabbas hårt. Denna invasion orsakar bland annat utarmning av en mycket sällsynt kransalg Höstlike (Nitella syncarpa).  Dessutom kommer fosfor (P) som är lagrad i våtmarkens sediment att frisättas och rinna ut i Österdalälven. Studien tyder på att de hydrokemiska förhållandena som råder i Limsjön är ytterst gynnsamma för denna art. Limsjön är en igenväxande, naturligt grund, väl uppvärmd, näringsrik sjö med ett långsamt vattenflöde, med en klar lutning i tillrinningsområdet och en lång uppehållstid.  Alla dessa faktorer tillsammans med insläpp av dräneringsytvatten bidrar till Limsjöns eutrofiering eller övergödning och följaktligen till ökningen av Stratiotes aloides L. individantal.

  • 115.
    Bunse, Carina
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Bacterioplankton in the light of seasonality and environmental drivers2017Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Bacterioplankton are keystone organisms in marine ecosystems. They are important for element cycles, by transforming dissolved organic carbon and other nutrients. Bacterioplankton community composition and productivity rates change in surface waters over spatial and temporal scales. Yet, many underlying biological processes determining when, why and how bacterioplankton react to changes in environmental conditions are poorly understood. Here, I used experiments with model bacteria and natural assemblages as well as field studies to determine molecular, physiological and ecological responses allowing marine bacteria to adapt to their environment.

    Experiments with the flavobacterium Dokdonia sp. MED134 aimed to determine how the metabolism of bacteria is influenced by light and different organic matter. Under light exposure, Dokdonia sp. MED134 expressed proteorhodopsin and adjusted its metabolism to use resources more efficiently when growing with lower-quality organic matter. Similar expression patterns were found in oceanic datasets, implying a global importance of photoheterotrophic metabolisms for the ecology of bacterioplankton.

    Further, I investigated how the composition and physiology of bacterial assemblages are affected by elevated CO2 concentrations and inorganic nutrients. In a large-scale experiment, bacterioplankton could keep productivity and community structure unaltered by adapting the gene expression under CO2 stress. To maintain pH homeostasis, bacteria induced higher expression of genes related to respiration, membrane transport and light acquisition under low-nutrient conditions. Under high-nutrient conditions with phytoplankton blooms, such regulatory mechanisms were not necessary. These findings indicate that open ocean systems are more vulnerable to ocean acidification than coastal waters.

    Lastly, I used field studies to resolve how bacterioplankton is influenced by environmental changes, and how this leads to seasonal succession of marine bacteria. Using high frequency sampling over three years, we uncovered notable variability both between and within years in several biological features that rapidly changed over short time scales. These included potential phytoplankton-bacteria linkages, substrate uptake rates, and shifts in bacterial community structure. Thus, high resolution time series can provide important insights into the mechanisms controlling microbial communities.

    Overall, this thesis highlights the advantages of combining molecular and traditional oceanographic methodological approaches to study ecosystems at high resolution for improving our understanding of the physiology and ecology of microbial communities and, ultimately, how they influence biogeochemical processes.

  • 116.
    Bunse, Carina
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Lundin, Daniel
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Lindh, Markus V.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Lund University.
    Sjöstedt, Johanna
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Israelsson, Stina
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Martínez-García, Sandra
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Universidade de Vigo, Spain.
    Baltar, Federico
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). University of Otago, New Zealand.
    Muthusamy, Sarala Devi
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Pontiller, Benjamin
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Karlsson, Christofer M. G.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Legrand, Catherine
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Pinhassi, Jarone
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Seasonality and co-occurrences of free-living Baltic Sea bacterioplanktonManuskript (preprint) (Annet vitenskapelig)
  • 117.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Ferrans, Laura
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Krumins, Janis
    University of Latvia, Latvia.
    Jani, Yahya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Klavins, Maris
    University of Latvia, Latvia.
    Fluorescence Spectroscopy – Applied Tool for Organic Matter Analysis2019Inngår i: Goldschmidt Abstracts, 2019, 2019Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Large applied projects in various sub-fields of environmental science studied and analyzed properties of organic matter. The “Life-Sure” is as continuation of started work for cost effective bottom sediments treatment where organic matter play important role of sorption of urban contaminants; “CONTRA” - beach wrack studies for advanced value-based bioeconomy development. Another project on Jurassic clay is interesting in discourse on Pleistocene glaciers glaciodynamics. Material from field was tested by 3D fluorescence excitation-emission matrix (EEM) providing “fingerprints” for a single compound or a mixture of fluorescent components. Thus humic macromolecules might be well seen nevertheless structural units have variable effects on the wavelength as well as intensity of fluorescence. It decreases with increasing molecular size of the humic macromolecule. For applied environmental projects this is well non-destructive tool to quantify the decomposition degree of organic matter requiring negligible amount of sample. This important method is valid for both organic matter and humic substances analytics. Chemical nature of humic substances can be correlated to structural information, e.g., functional groups, poly-condensation, aromaticity, dynamic properties related to intermolecular interactions. Acquired data from EEM provided significant input for scientific knowledge and innovation along with other analytical tools. 

  • 118.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Jani, Yahya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Kriipsalu, Mait
    Estonian Univ Life Sci, Estonia.
    Vincevica-Gaile, Zane
    Univ Latvia, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Celma, Gunita
    Univ Latvia, Latvia.
    Ozola, Ruta
    Univ Latvia, Latvia.
    Rozina, Laine
    Univ Latvia, Latvia.
    Rudovica, Vita
    Univ Latvia, Latvia.
    Hogland, Marika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Viksna, Arturs
    Univ Latvia, Latvia.
    Pehme, Kaur-Mikk
    Estonian Univ Life Sci, Estonia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Klavins, Maris
    Univ Latvia, Latvia.
    On the way to 'zero waste' management: Recovery potential of elements, including rare earth elements, from fine fraction of waste2018Inngår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 186, s. 81-90Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Existing schemes of solid waste handling have been improved implementing advanced systems for recovery and reuse of various materials. Nowadays, the 'zero waste' concept is becoming more topical through the reduction of disposed waste. Recovery of metals, nutrients and other materials that can be returned to the material cycles still remain as a challenge for future. Landfill mining (LFM) is one of the approaches that can deal with former dumpsites, and derived materials may become important for circular economy within the concept 'beyond the zero waste'. Perspectives of material recovery can include recycling of critical industrial metals, including rare earth elements (REEs). The LFM projects performed in the Baltic Region along with a conventional source separation of iron-scrap, plastics etc. have shown that the potential of fine-grained fractions (including clay and colloidal matter) of excavated waste have considerably large amounts of potentially valuable metals and distinct REEs. In this paper analytical screening studies are discussed extending the understanding of element content in fine fraction of waste derived from excavated, separated and screened waste in a perspective of circular economy. Technological feasibility was evaluated by using modified sequential extraction technique where easy extractable amount of metals can be estimated. Results revealed that considerable concentrations of Mn (418-823 mg/kg), Ni (41-84 mg/kg), Co (10.7-19.3 mg/kg) and Cd (1.0-3.0 mg/kg) were detected in fine fraction (<10 mm) of waste sampled from Hogbytorp landfill, while Cr (49-518 mg/kg) and Pb (30-264 mg/kg) were found in fine fraction (<10 mm) of waste from Torma landfill revealing wide heterogeneity of tested samples. Waste should become a utilizable resource closing the loop of anthropogenic material cycle as the hidden potential of valuable materials in dumps is considerable. (C) 2018 Elsevier Ltd. All rights reserved.

  • 119.
    Burlakovs, Juris
    et al.
    University of Latvia, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Orupold, Kaja
    Estonian University of Life Sciences, Estonia.
    Bhatnagar, Amit
    University of Eastern Finland, Finland.
    Gaile-Vincevica, Zane
    University of Latvia, Latvia.
    Rudovica, Vita
    University of Latvia, Latvia.
    Kriipsalu, Mait
    Estonian University of Life Sciences, Estonia.
    Hogland, Marika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Stapkevica, Mara
    University of Latvia, Latvia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Klavins, Maris
    University of Latvia, Latvia.
    Field-portable X-ray fluorescence spectrometry as rapid measurement tool for landfill mining operations: comparison of field data vs. laboratory analysis2015Inngår i: International Journal of Environmental Analytical Chemistry, ISSN 0306-7319, E-ISSN 1029-0397, Vol. 95, nr 7, s. 609-617Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Landfill mining applied in reclamation at the territories of old dump sites and landfills is a known approach tended to global economic and environmental benefits as recovery of metals and energy is an important challenge. The aim of this study was to analyse the concentration of several metallic elements (Ca, Cu, Cr, Fe, K, Mn, Pb, Zn) in the fine fraction of waste derived in the landfill and to compare the results of measurements obtained by field-portable equipment with the data gained by advanced analytical tools. Atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS) were used for the quantitative detection of metallic elements at the laboratory; whereas field-portable X-ray fluorescence spectrometry (FPXRF) was applied for rapid sample characterisation in the field (on-site). Wet digestion of samples (fine fraction of waste at landfill) was done prior analytical procedures at the laboratory conditions, but FPXRF analysis was performed using raw solid samples of waste fine fraction derived in the Kudjape Landfill in Estonia. Although the use of AAS and ICP-MS for the measurements of metals achieves more precise results, it was concluded that precision and accuracy of the measurements obtained by FPXRF is acceptable for fast approximate evaluation of quantities of metallic elements in fine fraction samples excavated from the waste at landfills. Precision and accuracy of the results provided by express method is acceptable for quick analysis or screening of the concentration of major and trace metallic elements in field projects; however, data correction can be applied by calculating moisture and organic matter content dependent on sample matrix as well as special attention must be paid on sample selection and homogenisation and number of analysed samples.

  • 120.
    Burlakovs, Juris
    et al.
    University of Latvia, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Vincevica-Gaile, Zane
    University of Latvia, Latvia.
    Rudovica, Vita
    University of Latvia, Latvia.
    Orupold, Kaja
    Estonian University of Life Sciences, Estonia.
    Stapkevica, Mara
    University of Latvia, Latvia.
    Bhatnagar, Amit
    University of Eastern Finland, Finland.
    Kriipsalu, Mait
    Estonian University of Life Sciences, Estonia.
    Hogland, Marika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Klavins, Maris
    University of Latvia, Latvia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Mobility of Metals and Valorization of Sorted Fine Fraction of Waste After Landfill Excavation2016Inngår i: Waste and Biomass Valorization, ISSN 1877-2641, E-ISSN 1877-265X, Vol. 7, nr 3, s. 593-602Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Reclamation of landfills and dumpsites requiresdetailed technical and economic evaluation of actual and potential pollution at the site, including detection of the main contaminants, their concentration, chemical stability and mobility in the environment. Contamination with metallic elements and metalloids is among the most important problems that limits recultivation of landfills and dumpsites and reuse of landfilled materials. This study was implemented at the Kudjape Municipal Landfill, located on Saaremaa Island in Estonia. The Kudjape Landfill is apartly closed landfill recultivated by covering it with a layer of a fine fraction of landfill material after the landfill mining operations. The fine fraction was derived at the site by sorting the landfill material (i.e., disposed waste) using mechanical screening, manual sorting and sieving. Obtained relatively homogeneous material, consisting of particles smaller than 10 mm, was defined as a fine fractionof waste. Samples from the fine fraction at different depth were collected and analyzed. Metal mobility was assessed after the sequential extraction. Results revealed that such elements as Zn, Mn, Mg are found in various fractions; Fe,Cd, Cr—mainly in residual fraction; Cu, Pb, Ni, Ba, Co and Rb mostly in fractions of residuals and reduced compounds,but they are presented in larger proportion of acid and water soluble fractions. Slight interconnection ofdetected parameters and sampling depth was revealed. Sequential extraction of elements in the fine fraction suggested the valorization of waste and confirmed that such landfill material can be successfully used as a landfill covering layer under the specific engineering circumstances.

  • 121.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). University of Latvia, Latvia.
    Kriipsalu, M.
    Estonian University of Life Sciences, Estonia.
    Arina, D.
    Latvia University of Agriculture, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Shmarin, S.
    Kyiv National University, Ukraine.
    Denafas, G.
    Kaunas University of Technology, Lithuania.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Former dump sites and the landfill mining perspectives in baltic countries and Sweden: The status2013Inngår i: SGEM2013 Conference Proceedings, 2013, s. 485-492Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Landfills are considered as places where the life cycle of products ends thus meaning that resources and materials, which before were valuables, become useless and are disposed forever in places away from the sight. Landfills that were not closed appropriately are of primary importance as the EU legislation demands closure of noncompliant landfills, re-cultivation followed by soil and groundwater remediation. Waste dumps in former times were created without any environmental planning and it causes problems. Planned actions to reduce and prevent impacts to the environment and get extracted valuables from dump sites are proposed in a new approach known as "landfill mining" (LFM). The number of dumpsites which are still not appropriately closed according to the EU Directives has diminished, but not completely. Landfills that are located close to the Baltic Sea and Black Seas could be good candidates for LFM. This research topic has had evolved in many aspects with the interest increase on material recovery, refuse derived fuels (RDF) production, greenhouse gas and leachate emission diminishing. Real-time applied LFM in last decade in Sweden has started and Estonian scientists and entrepreneurs took over the initiative - the project in Saaremaa Island is an example of closing the life cycle of dumpsites by following a more sustainable approach. The rise of raw material and energy costs promotes the process of LFM to be economically feasible, but this approach must be adjusted in regulations (permittingprohibiting schemes, environmental impact assessment, staff safety, monitoring).

  • 122.
    Burlakovs, Juris
    et al.
    University of Latvia, Latvia.
    Kriipsalu, Mait
    Estonian University of Life Sciences, Estonia.
    Arina, Dace
    Institute of Physical Energetics, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Ozola, Ruta
    University of Latvia, Latvia.
    Denafas, Gintaras
    Kaunas University of Technology, Lithuania.
    Hogland, Marika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Mykhaylenko, Valeriy
    Taras Shevchenko National University of Kyiv, Ukraine.
    Jani, Yahya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Orupold, Kaja
    Estonian University of Life Sciences, Estonia.
    Turkadze, Tsitsino
    A. Tsereteli State University, Georgia.
    Daugelaite, Valdone
    Kaunas University of Technology, Lithuania.
    Bucinskas, Algimantas
    Kaunas University of Technology, Lithuania.
    Rudovica, Vita
    University of Latvia, Latvia.
    Horttanainen, Mika
    Lappeenranta University of Technology, Finland.
    Klavins, Maris
    University of Latvia, Latvia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Metals and rare Earth’s elements in landfills: case studies2016Inngår i: 3rd Int. Symposium on Enhanced Landfill Mining, Lisboa, 8-10/2/2016, 2016Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Landfills are considered as places where the life cycle of products ends and materialshave been “disposed forever”. The landfill mining (LFM) approach can deal with formerdumpsites and this material may become important for circular economy perspectiveswithin the concept “Beyond the zero waste”. Potential material recovery should includeperspectives of recycling of critical industrial metals where rare Earth elements (REEs)are playing more and more important role. Real-time applied LFM projects in the BalticRegion have shown the potential of fine-grained fractions (including clay and colloidalmatter) of excavated waste as storage of considerably large amounts of valuable metalsand REEs. Analytical screening studies have extended a bit further the understanding offine fraction contents of excavated, separated and screened waste in a circular economyperspective. The Swedish Institute and Latvian Research Program “Res Prod” supportedthe research.

  • 123.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM). Univ Latvia, Latvia.
    Kriipsalu, Mait
    Estonian Univ Life Sci, Estonia.
    Klavins, Maris
    Univ Latvia, Latvia.
    Bhatnagar, Amit
    Univ Eastern Finland, Finland.
    Vincevica-Gaile, Zane
    Univ Latvia, Latvia.
    Stenis, Jan
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Jani, Yahya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Mykhaylenko, Valeriy
    Taras Shevchenko Natl Univ Kyiv, Ukraine.
    Denafas, Gintaras
    Fac Chem Technol, Lithuania.
    Turkadze, Tsitsino
    Akaki Tsereteli State Univ, Republic of Georgia.
    Hogland, Marika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Rudovica, Vita
    Univ Latvia, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Rosendal, Rene Moller
    Danish Waste Solut ApS, Denmark.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Paradigms on landfill mining: From dump site scavenging to ecosystem services revitalization2017Inngår i: Resources, Conservation and Recycling, ISSN 0921-3449, E-ISSN 1879-0658, Vol. 123, s. 73-84Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    For the next century to come, one of the biggest challenges is to provide the mankind with relevant and sufficient resources. Recovery of secondary resources plays a significant role. Industrial processes developed to regain minerals for commodity production in a circular economy become ever more important in the European Union and worldwide. Landfill mining (LFM) constitutes an important technological toolset of processes that regain resources and redistribute them with an accompanying reduction of hazardous influence of environmental contamination and other threats for human health hidden in former dump sites and landfills. This review paper is devoted to LFM problems, historical development and driving paradigms of LFM from 'classical hunting for valuables' to 'perspective in ecosystem revitalization'. The main goal is to provide a description of historical experience and link it to more advanced concept of a circular economy. The challenge is to adapt the existing knowledge to make decisions in accordance with both, economic feasibility and ecosystems revitalization aspects. (C) 2016 Elsevier B.V. All rights reserved.

  • 124.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Kriipsalu, Mait
    Estonian Univ Life Sci, Estonia.
    Porshnov, Dmitry
    Univ Latvia, Latvia.
    Jani, Yahya
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Ozols, Viesturs
    Univ Latvia, Latvia.
    Pehme, Kaur-Mikk
    Estonian Univ Life Sci, Estonia.
    Rudovica, Vita
    Univ Latvia, Latvia.
    Grinfelde, Inga
    Latvia Univ Life Sci & Technol, Latvia.
    Pilecka, Jovita
    Latvia Univ Life Sci & Technol, Latvia.
    Vincevica-Gaile, Zane
    Univ Latvia, Latvia.
    Turkadze, Tsitsino
    Akaki Tsereteli State Univ, Georgia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Klavins, Maris
    Univ Latvia, Latvia.
    Gateway of Landfilled Plastic Waste Towards Circular Economy in Europe2019Inngår i: Separations, E-ISSN 2297-8739, Vol. 6, nr 2, s. 1-8, artikkel-id 25Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    For decades, significant work has been conducted regarding plastic waste by dealing with rejected materials in waste masses through their accumulation, sorting and recycling. Important political and technical challenges are involved, especially with respect to landfilled waste. Plastic is popular and, notwithstanding decrease policies, it will remain a material widely used in most economic sectors. However, questions of plastic waste recycling in the contemporary world cannot be solved without knowing the material, which can be achieved by careful sampling, analysis and quantification. Plastic is heterogeneous, but usually all plastic waste is jointly handled for recycling and incineration. Separation before processing waste through the analytical approach must be applied. Modern landfill mining and site clean-up projects in contemporary waste management systems require comprehensive material studies ranging from the macro-characterization of waste masses to a more detailed analysis of hazardous constituents and properties from an energy calorific standpoint-where, among other methods, thermogravimetric research coupled with life cycle assessment (LCA) and economic assessment is highly welcomed.

  • 125.
    Burlakovs, Juris
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Pehme, Kaur-Mikk
    Estonian Univ Life Sci, Estonia.
    Anne, O.
    Kriipsalu, Mait
    Estonian Univ Life Sci, Estonia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Remarks on novel case studies for integrated pollution prevention in the baltic sea region2018Inngår i: International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM, International Multidisciplinary Scientific GeoConference & EXPO SGEM , 2018, nr 3.2, s. 1167-1174Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The Baltic Sea is suffering from extended surplus of phosphorus, nitrogen and other pollutants. It causes diminishing biodiversity and increased eutrophication (mainly due to nitrogen and phosphorous in various substances). The common effort in the region is environmental standpoint in sustainable circular economy. Oil pollutants, heavy metals, organic substances are being released to the Baltic Sea and consequences for maritime environment are serious. However, Baltic Sea Region is one of the most innovative regions in the world considering environmental technology development. The interregional potential is about to solve the above mentioned challenges there were developed the project “Reviving Baltic Resilience (RBR)”. By using prior experiences in other EU projects as well as continuously working and acquiring new data and knowledge, our aim is to test at proactive methods/technologies for preventing pollution reaching the maritime environment and entering biological chains. The paper focuses on three novel case studies: 1) pollution prevention through phytoremediation at landfill close to the sea; 2) studies on sludge deposits with focus on recovery potential; 3) prevention of release of pollutants from sediments in bays and lagoons. This project was supported by Interreg South Baltic program “Reviving Baltic Resilience” (RBR) and Swedish Institute “PECEC”. © SGEM 2018.

  • 126.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    General methodology2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 141-146Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 127.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Initial risk analysis of potential failure modes2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 147-158Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 128.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Phase change behaviour of some latent heat storage media based on calcium chloride hexahydrate2009Inngår i: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 83, nr 4, s. 485-500Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Phase change behaviour of pure and some chemically modified calcium chloride hexahydrate materials suggested in the literature as suitable heat storage media was studied in storage systems with a low degree of mixing in order to evaluate their long-term reversibility. The influence of gravitation on the phase change properties of the pure system was elaborated by determining local salt concentrations in the liquid phase and changes in the volume of the system during repeated melting and crystallization, whereby the amounts of the different phases being present could be assessed. It was found that thermo gravitational effects are of minor importance in generating salt concentration gradients in the liquid phase when compared to the concentration gradients resulting from the sedimentation of the formed tetrahydrate and the hexahydrate during the phase change reactions. Due to these effects it was not possible to prevent irreversible tetrahydrate formation and deterioration in heat storage capability by adding a surplus of water to the hexahydrate materials, if seeds for the tetrahydrate were present during repeated melting and crystallization. Upon addition of SrCl(2) center dot 6H(2)O a solid solution of the two hexahydrates is formed and as a result the formation of the tetrahydrate is suppressed. Due to irreversible formation of SrCl(2) center dot 6H(2)O a state of true congruent melting seems, however, not possible to reach. Phase segregation effects also in this case lead to irreversible calcium chloride tetrahydrate formation if seeds for the latter are added during repeated melting and crystallization. If Ca(OH)(2) is also added, the tetrahydrate formation can be further suppressed. But, even in this case, irreversible tetrahydrate formation can not be prevented if the composition of the liquid phase corresponds to the hexahydrate. On addition of 5 wt% KCl or 5 wt% KCl + 2 wt% SrCl(2) center dot 6H(2)O or 5 wt% KCl + 0.4 wt% NaCl, repeated melting and crystallization in the presence of seeds of the tetrahydrate can, however, be carried out without irreversible formation of the latter occurs. In the heat storage system CaCl(2) center dot 6H(2)O + 5 wt% KCl, formation of tetrahydrate is observed but its rate of dissolution is found considerably faster than in the pure hexahydrate system. It was concluded that with those modified calcium chloride hexahydrate systems reversible phase change cycling can be performed and therefore there is for example no the need for thickener agents to be added to avoid irreversible tetrahydrate formation successively reducing heat storage capability of systems in those cases.

  • 129.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Qualification testing2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 159-174Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 130.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Selecting material for the exterior panel of a private car back door by adopting a total cost accounting approach2009Inngår i: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 30, nr 3, s. 826-832Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A total cost accounting approach for material selection is demonstrated by analysing the suitability of some light weight materials for use in the exterior panel of a back door to a private car. For pre-selection purposes, the suitability of using low alloy steel, aluminium, SMC and a hybrid GMT/aluminium material as construction material for the exterior panel of the back door are compared by taking into account differences in production cost, cost associated with excess mass, cost of probable failures and damages, maintenance and operational costs, end-of-life cost, and cost associated with probable ecological damage. From one manufacturer's point of view and considering only the production cost for the installed part of the back door, steel is the best alternative for large production volumes. However, this is not the case when taking into account all costs. All the other materials seem better and exhibit essentially the same qualities. The main reason is lower fuel consumption. The results of the suitability analysis nicely reflect the relative importance of the various factors contributing to the total cost but the suitability analysis also points to the need of performing a more advanced analysis taking into account also aspects like safety and ease of surface treatment.

  • 131.
    Carlsson, Bo
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Service life prediction from results of accelerated aging2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 197-224Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 132.
    Carlsson, Bo
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Frei, U
    Köhl, M
    Möller, K
    Accelerated testing for life time assessment of solar absorber surfaces1998Inngår i: Climatic and Air Pollution Effects on Materials and Equipment / [ed] Committee of European Environmental Engineering Societies. Working Group Climatic and Air Pollution Effects on Materials and Equipment., Pfinztal: Gesellschaft für Umveltsimulation, GUS , 1998, s. 93-?Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 133.
    Carlsson, Bo
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Jorgensen, G.
    Köhl, M.
    Introduction to the performance and durability assessment of optical materials for solar thermal systems2004Inngår i: Performance and durability assessment: optical materials for solar thermal systems / [ed] Michael Köhl, B. Carlsson, G. J. Jorgensen,and A. W. Czanderna, Amsterdam: Elsevier, 2004, 1, s. 3-16Kapittel i bok, del av antologi (Annet vitenskapelig)
  • 134.
    Carlsson, Bo
    et al.
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Persson, Helena
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Meir, Michaela
    Aventa AS, Norway.
    Rekstad, John
    University of Oslo, Norway.
    A total cost perspective on use of polymeric materials in solar collectors - Importance of environmental performance on suitability2014Inngår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 125, s. 10-20Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    To assess the suitability of solar collector systems in which polymeric materials are used versus those in which more traditional materials are used, a case study was undertaken. In this case study a solar heating system with polymeric solar collectors was compared with two equivalent but more traditional solar heating systems: one with flat plate solar collectors and one with evacuated tube solar collectors. To make the comparison, a total cost accounting approach was adopted. The life cycle assessment (LCA) results clearly indicated that the polymeric solar collector system is the best as regards climatic and environmental performance when they are expressed in terms of the IPPC 100 a indicator and the Ecoindicator99, H/A indicator, respectively. In terms of climatic and environmental costs per amount of solar heat collected, the differences between the three kinds of collector systems were small when compared with existing energy prices. With the present tax rates, it seems unlikely that the differences in environmental and climatic costs will have any significant influence on which system is the most favoured, from a total cost point of view. In the choice between a renewable heat source and a heat source based on the use of a fossil fuel, the conclusion was that for climatic performance to be an important economic factor, the tax or trade rate of carbon dioxide emissions must be increased significantly, given the initial EU carbon dioxide emission trade rate. The rate would need to be at least of the same order of magnitude as the general carbon dioxide emission tax rate used in Sweden. If environmental costs took into account not only the greenhouse effect but also other mechanisms for damaging the environment as, for example, the environmental impact factor Ecoindicator99 does, the viability of solar heating versus that of a natural gas heating system would be much higher.

  • 135.
    Carlsson, Bo
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Persson, Helena
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Meir, Michaela
    Aventa AS, Norway.
    Rekstad, John
    Olso University, Norway.
    Importance of climatic and environmental cost on suitability of polymeric materials in solar therma collectors2012Inngår i: Proceedings: Linnaeus ECO-TECH 2012, international conference on natural sciences and environmental technologies for waste and wastewater treatment, remediation, emissions related to climate, environmental and economic effects ; the eighth International Conference on the Establishment of Cooperation between Companies and Institutions in the Nordic Countries, the Baltic Sea Region, and the World, November 26-28, 2012, Kalmar, Sweden / [ed] Eva Kumar, Joacim Rosenlund, Fabio Kaczala, William Hogland, 2012Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    To assess suitability ofsolar collector systems with polymeric materials versus those with moretraditional materials such as metals a case study was undertaken within theframework of Task 39 of the IEA Solar Heating and Cooling Programme. In thisstudy one solar heating system with polymeric solar collectors were comparedwith two equivalent but more traditional solar heating systems, one with flatplate collectors and one with evacuated tube solar collectors. Life Cycle Assessment(LCA) results obtained clearly indicated that the polymeric solar collectorsystem is the most favourable as regards climatic and environmentalperformance. In terms of climatic and environmental costs per solar heat collected,the differences between the three kinds of collector systems, however, aresmall when compared with existing energy prices. In the choice between arenewable heat source and a heat source based on the use of a fossil fuel,which was also analysed in the present study, the conclusion was that forclimatic performance to be an important economic factor, the rate of carbondioxide emission must be considerably increased above the level given by thepresent EU carbon dioxide emission trade rate. The rate would be at least ofthe same order of magnitude as the general carbon dioxide emission tax rateemployed in

    Sweden.An alternative to an increase in the EU carbon dioxide emission trade ratewould be to introduce a tax system based on environmental cost, making use ofe.g. Ecoindicator99, to include also other impacts on the environment not justthe greenhouse effect.

  • 136.
    Carlsson, Bo
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Wärn, Per
    Nylinder, Åke
    Ljung, Kåre
    Marström, Göran
    Suitability of carbon fibre reinforced plastic, CFRP, versus glass fibre reinforced plastic, GFRP, in Wind Turbine Blades – A total cost analysis: Final report, Swedish Energy Agency Project 31634-12009Rapport (Annet vitenskapelig)
  • 137.
    Carlsson, Sara
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Hållbar dagvattenhantering - En fallstudie i Nyköping2017Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [en]

    In urban areas stormwater have become a problem due to limited infiltration. Impermeable surfaces such as asphalt covers and buildings cause changes in the flow of water and content of contaminating products, which normally are not processed by sewage treatment works. Instead, the stormwater often drained off to an adjacent watercourse which end in a lake or the sea, in order to limit inundation of streets and cellars in houses. Using vegetated recipients, such as wetlands, tree plantations, grass and herbcovered surfaces is anefficient and economical way to manage stormwaterinflow, which also improves the infiltration and the biodiversity in the area. Green ceilings reduce the formation of stormwater, especially designed ditches are efficient storage at extreme rainfalls and slow down the drainage

     

    In this study, a few different natural retaining and equalisation methods are evaluated and  proposed for the design of an industrial area in Nyköping municipality which is planned to be a residential area. Challenges for the introduction of various natural water systems are that they need land space and relate to the existing buildings and at the same time get a sufficient drainage. Much of the report is based on the requirement in the area of Södermanland county, but also presents expected precipitation rates for the entire country that are essential for optimal water treatment

  • 138.
    Cassani, Stefano
    et al.
    University of Insubria, Italy.
    Kovarich, Simona
    University of Insubria, Italy.
    Papa, Ester
    University of Insubria, Italy.
    Roy, Partha Pratim
    University of Insubria, Italy.
    Rahmberg, Magnus
    IVL Swedish Environm Res Inst Ltd, Stockholm.
    Nilsson, Sara
    IVL Swedish Environm Res Inst Ltd, Stockholm.
    Sahlin, Ullrika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Jeliazkova, Nina
    IdeaConsult Ltd, Bulgaria.
    Kochev, Nikolay
    Paisij Hilendarski Univ Plovdiv, Bulgaria.
    Pukalov, Ognyan
    Paisij Hilendarski Univ Plovdiv, Bulgaria.
    Tetko, Igor V.
    German Res Ctr Environm Hlth, Germany.
    Brandmaier, Stefan
    German Res Ctr Environm Hlth, Germany.
    Durjava, Mojca Kos
    Publ Hlth Inst Maribor, Slovenia.
    Kolar, Boris
    Publ Hlth Inst Maribor, Slovenia.
    Peijnenburg, Willie
    Natl Inst Publ Hlth & Environm RIVM, Netherlands ; Leiden Univ, Netherlands.
    Gramatica, Paola
    Univ Insubria, Italy.
    Evaluation of CADASTER QSAR Models for the Aquatic Toxicity of (Benzo)triazoles and Prioritisation by Consensus Prediction2013Inngår i: ATLA (Alternatives to Laboratory Animals), ISSN 0261-1929, Vol. 41, nr 1, s. 49-64Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    QSAR regression models of the toxicity of triazoles and benzotriazoles ([B] TAZs) to an alga (Pseudokirchneriella subcapitata), Daphnia magna and a fish (Onchorhynchus mykiss), were developed by five partners in the FP7-EU Project, CADASTER. The models were developed by different methods - Ordinary Least Squares (OLS), Partial Least Squares (PLS), Bayesian regularised regression and Associative Neural Network (ASNN) - by using various molecular descriptors (DRAGON, PaDEL-Descriptor and QSPR-THESAURUS web). In addition, different procedures were used for variable selection, validation and applicability domain inspection. The predictions of the models developed, as well as those obtained in a consensus approach by averaging the data predicted from each model, were compared with the results of experimental tests that were performed by two CADASTER partners. The individual and consensus models were able to correctly predict the toxicity classes of the chemicals tested in the CADASTER project, confirming the utility of the QSAR approach. The models were also used for the prediction of aquatic toxicity of over 300 (B)TAZs, many of which are included in the REACH pre-registration list, and were without experimental data. This highlights the importance of QSAR models for the screening and prioritisation of untested chemicals, in order to reduce and focus experimental testing.

  • 139. Cederqvist, Lars
    et al.
    Sorensen, Carl D.
    Reynolds, Anthony P.
    Öberg, Tomas
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Improved process stability during friction stir welding of 5 cm thick copper canisters through shoulder geometry and parameter studies2009Inngår i: Science and technology of welding and joining, ISSN 1362-1718, E-ISSN 1743-2936, Vol. 14, nr 2, s. 178-184Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The spent nuclear fuel from Swedish power plants will be placed in copper canisters that are sealed with friction stir welding and the stability and robustness of this process is now being optimised in three steps: first, the shoulder geometry was identified that produced the most stable weld cycle, then the welding parameters were optimised for that geometry with regards to stability, and finally, the chosen geometry and welding parameters were verified and evaluated during multiple weld cycles. The shoulder study showed that stable welds could be produced repeatedly with a convex scroll geometry which proved more stable than various concave and flat scroll geometries. In the subsequent parameter study, not only were the most stable values for the welding parameters derived, but a clear relationship was shown between power input and tool temperature. This relationship can be used to more accurately control the process within the parameter windows, not only for this application but for other applications where the welding temperature needs to be kept within a specified range. Similarly, the potential of the convex scroll shoulder geometry for use in applications with other metals and thicknesses is evident.

  • 140.
    Cederqvist, Lars
    et al.
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Öberg, Tomas
    Högskolan i Kalmar, Naturvetenskapliga institutionen.
    Reliability study of friction stir welded copper canisters containing Sweden's nuclear waste2008Inngår i: Reliability Engineering & System Safety, ISSN 0951-8320, E-ISSN 1879-0836, Vol. 93, nr 10, s. 1491-1499Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The plan for the final disposal of spent fuel from Swedish nuclear power plants is to place it in copper canisters that are sealed and stored in a deep repository. The canisters will be sealed by friction stir welding (FSW) and the reliability of this process has now been evaluated. The reliability study was performed in three steps: first an optimization experiment to identify optimal process settings and establish the process window; then a demonstration experiment with welding under production-like conditions; and finally a post-demonstration series to evaluate an adjustment in the welding equipment. A process window was defined around the optimal process setting, i.e., the limits within which the welding variables must lie in order for the process to produce the desired result. In the demonstration experiment, a series of 20 sealing welds was carried out under production-like conditions. The maximum discontinuity in each weld — detected by non-destructive testing — was fitted to a generalized extreme value distribution. The 95% confidence interval for the maximum discontinuity in a production series of 4500 canisters was estimated at 4.5–7.7 mm. The best estimate from the post-demonstration series suggests that the maximum size of a discontinuity will not exceed 2.3 mm. A main conclusion is that the FSW process produces reliable results, fulfilling the predetermined requirements for minimum copper thickness by a very good margin.

  • 141. Cinner, J. E.
    et al.
    Daw, T. M.
    McClanahan, T. R.
    Muthiga, N.
    Abunge, C.
    Hamed, S.
    Mwaka, B.
    Rabearisoa, A.
    Wamukota, Andrew
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Fisher, E.
    Jiddawi, N.
    Transitions toward co-management: The process of marine resource management devolution in three east African countries2012Inngår i: Global Environmental Change, ISSN 0959-3780, E-ISSN 1872-9495, Vol. 22, nr 3, s. 651-658Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Communities are increasingly empowered with the ability and responsibility of working with national governments to make decisions about marine resources in decentralized co-management arrangements. This transition toward decentralized management represents a changing governance landscape. This paper explores the transition to decentralisation in marine resource management systems in three East African countries. The paper draws upon expert opinion and literature from both political science and linked social-ecological systems fields to guide exploration of five key governance transition concepts in each country: (1) drivers of change; (2) institutional arrangements; (3) institutional fit; (4) actor interactions; and (5) adaptive management. Key findings are that decentralized management in the region was largely donor-driven and only partly transferred power to local stakeholders. However, increased accountability created a degree of democracy in regards to natural resource governance that was not previously present. Additionally, increased local-level adaptive management has emerged in most systems and, to date, this experimental management has helped to change resource user's views from metaphysical to more scientific cause-and-effect attribution of changes to resource conditions. (C) 2012 Elsevier Ltd. All rights reserved,

  • 142.
    Dace, Elina
    et al.
    Riga Tech Univ, Latvia.
    Muizniece, Indra
    Riga Tech Univ, Latvia.
    Blumberga, Andra
    Riga Tech Univ, Latvia.
    Kaczala, Fabio
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Searching for solutions to mitigate greenhouse gas emissions by agricultural policy decisions - Application of system dynamics modeling for the case of Latvia2015Inngår i: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 527, s. 80-90Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    European Union (EU) Member States have agreed to limit their greenhouse gas (GHG) emissions from sectors not covered by the EU Emissions Trading Scheme (non-ETS). That includes also emissions from agricultural sector. Although the Intergovernmental Panel on Climate Change (IPCC) has established a methodology for assessment of GHG emissions from agriculture, the forecasting options are limited, especially when policies and their interaction with the agricultural system are tested. Therefore, an advanced tool, a system dynamics model, was developed that enables assessment of effects various decisions and measures have on agricultural GHG emissions. The model is based on the IPCC guidelines and includes the main elements of an agricultural system, i.e. land management, livestock farming, soil fertilization and crop production, as well as feedback mechanisms between the elements. The case of Latvia is selected for simulations, as agriculture generates 22% of the total anthropogenic GHG emissions in the country. The results demonstrate that there are very limited options for GHG mitigation in the agricultural sector. Thereby, reaching the non-ETS GHG emission targets will be very challenging for Latvia, as the level of agricultural GHG emissions will be exceeded considerably above the target levels. Thus, other non-ETS sectors will have to reduce their emissions drastically to "neutralize" the agricultural sector's emissions for reaching the EU's common ambition tomove towards low-carbon economy. The developed model may serve as a decision support tool for impact assessment of various measures and decisions on the agricultural system's GHG emissions. Although the model is applied to the case of Latvia, the elements and structure of the model developed are similar to agricultural systems in many countries. By changing numeric values of certain parameters, the model can be applied to analyze decisions and measures in other countries. (C) 2015 Elsevier B.V. All rights reserved.

  • 143.
    Dahlström, Erika
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Kan Gotland reducera en stor del av sina koldioxidutsläpp genom CCS?2019Independent thesis Basic level (degree of Bachelor), 10 poäng / 15 hpOppgave
    Abstract [sv]

    De ökande växthusgasutsläppen till atmosfären leder till skadliga effekter för jordens klimat. Växthusgasutsläppen minskar i för långsam takt för att klimatpolitiska mål ska kunna nås, till exempel Parisavtalet från 2015. Koldioxidlagring eller CCS (Carbon Capture and Storage) ses som en viktig teknik för att minska industriers utsläpp, speciellt inom energiproduktion men även inom cementindustri, för att minska utsläpp från tillverkningsprocessen. I den här studien undersöks möjligheterna för koldioxidlagring i ett område i sydöstra Östersjön. Syftet är att undersöka möjligheten att Gotland kan reducera en stor del av sina koldioxidutsläpp genom CCS-teknik. En source to sink-matchning utförs genom att matcha koldioxidutsläppen från utvalda industrier på Gotland med geologiska reservoarer i Östersjön, för att se om reservoarerna kan lagra koldioxiden. Resultaten visar att lagringskapaciteten i området är enorm teoretiskt sett, i praktiken är kapaciteten låg och det krävs en undersökning av ett större område än det som undersöktes i denna studie. Kostnaderna för CCS-teknik är mycket höga och det krävs statliga finansieringar inledningsvis för implementering. Kostnaden för koldioxidutsläpp bör vara högre än kostnaden för koldioxidlagring. Teknikutveckling, samhällsförändring och samarbete mellan länder är viktigt för att öka takten av CCS implementering.

  • 144.
    Dale, Virginia H.
    et al.
    Oak Ridge Natl Lab, USA.
    Kline, Keith L.
    Oak Ridge Natl Lab, USA.
    Parish, Esther S.
    Oak Ridge Natl Lab, USA.
    Cowie, Annette L.
    Univ New England, Australia.
    Emory, Robert
    Weyerhaeuser Co, USA.
    Malmsheimer, Robert W.
    SUNY Coll Environm Sci & Forestry, USA.
    Slade, Raphael
    Imperial Coll London, UK.
    Smith, Charles Tattersall (Tat), Jr.
    Univ Toronto, Canada.
    Wigley, Thomas Bently (Ben)
    NCASI, USA.
    Bentsen, Niclas S.
    Univ Copenhagen, Denmark.
    Berndes, Goran
    Chalmers University of Technology.
    Bernier, Pierre
    Canadian Forest Serv, Canada.
    Brandao, Miguel
    Inst Soil Sci & Plant Cultivat, Poland.
    Chum, Helena L.
    NREL, USA.
    Diaz-Chavez, Rocio
    Imperial Coll London, UK.
    Egnell, Gustaf
    Swedish University of Agricultural Science.
    Gustavsson, Leif
    Linnéuniversitetet, Fakulteten för teknik (FTK), Institutionen för byggd miljö och energiteknik (BET).
    Schweinle, Jorg
    Thunen Inst Int Forestry & Forest Econ, Germany.
    Stupak, Inge
    Univ Copenhagen, Denmark.
    Trianosky, Paul
    Sustainable Forestry Initiat Inc, USA.
    Walter, Arnaldo
    State Univ Campinas UNICAMP, Brazil.
    Whittaker, Carly
    Rothamsted Res, UK.
    Brown, Mark
    Univ Sunshine Coast, Australia.
    Chescheir, George
    NCSU, USA.
    Dimitriou, Ioannis
    Swedish University of Agricultural Science.
    Donnison, Caspar
    Univ Southampton, UK.
    Eng, Alison Goss
    US Dept Energy DOE, USA.
    Hoyt, Kevin P.
    Univ Tennessee, USA.
    Jenkins, Jennifer C.
    Enviva LP, USA.
    Johnson, Kristen
    US Dept Energy DOE, USA.
    Levesque, Charles A.
    Innovat Nat Resource Solut LLC, USA.
    Lockhart, Victoria
    Resource Management Serv LLC, USA.
    Negri, Maria Cristina
    Argonne Natl Lab, USA.
    Nettles, Jami E.
    Weyerhaeuser Co, USA.
    Wellisch, Maria
    Agr & Agri Food Canada, Canada.
    Status and prospects for renewable energy using wood pellets from the southeastern United States2017Inngår i: Global Change Biology Bioenergy, ISSN 1757-1693, E-ISSN 1757-1707, Vol. 9, nr 8, s. 1296-1305Artikkel i tidsskrift (Annet vitenskapelig)
    Abstract [en]

    The ongoing debate about costs and benefits of wood-pellet based bioenergy production in the southeastern United States (SE USA) requires an understanding of the science and context influencing market decisions associated with its sustainability. Production of pellets has garnered much attention as US exports have grown from negligible amounts in the early 2000s to 4.6 million metric tonnes in 2015. Currently, 98% of these pellet exports are shipped to Europe to displace coal in power plants. We ask, 'How is the production of wood pellets in the SE USA affecting forest systems and the ecosystem services they provide?' To address this question, we review current forest conditions and the status of the wood products industry, how pellet production affects ecosystem services and biodiversity, and what methods are in place to monitor changes and protect vulnerable systems. Scientific studies provide evidence that wood pellets in the SE USA are a fraction of total forestry operations and can be produced while maintaining or improving forest ecosystem services. Ecosystem services are protected by the requirement to utilize loggers trained to apply scientifically based best management practices in planning and implementing harvest for the export market. Bioenergy markets supplement incomes to private rural landholders and provide an incentive for forest management practices that simultaneously benefit water quality and wildlife and reduce risk of fire and insect outbreaks. Bioenergy also increases the value of forest land to landowners, thereby decreasing likelihood of conversion to nonforest uses. Monitoring and evaluation are essential to verify that regulations and good practices are achieving goals and to enable timely responses if problems arise. Conducting rigorous research to understand how conditions change in response to management choices requires baseline data, monitoring, and appropriate reference scenarios. Long-term monitoring data on forest conditions should be publicly accessible and utilized to inform adaptive management.

  • 145.
    Daneshvar, Ehsan
    et al.
    Isfahan Univ Technol, Dept Fisheries, Fac Nat Resources, Esfahan, Iran.
    Kousha, Masoud
    Isfahan Univ Technol, Dept Fisheries, Fac Nat Resources, Esfahan, Iran.
    Sohrabi, Mohammad Salar
    Isfahan Univ Technol, Dept Fisheries, Fac Nat Resources, Esfahan, Iran.
    Panahbehagh, Bardia
    Kharazmi Univ, Fac Math & Comp Sci, Tehran, Iran.
    Bhatnagar, Amit
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Younesi, Habibollah
    Tarbiat Modares Univ, Fac Nat Resources, Dept Environm Sci, Noor, Iran.
    Sternberg, Steven P. K.
    Univ Minnesota, Dept Chem Engn, Duluth, MN 55812 USA.
    Application of response surface methodology for the biosorption of Acid Blue 25 dye using raw and HCl-treated macroalgae2015Inngår i: Desalination and Water Treatment, ISSN 1944-3994, E-ISSN 1944-3986, Vol. 53, nr 6, s. 1710-1723Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The present study was conducted to optimize the various experimental conditions, such as biomass loading, initial C.I. Acid Blue 25 (AB25) dye concentration, and initial solution pH for biosorption of dye on raw and HCl-treated brown alga, Padina australis and red alga, Jania adhaerens. Biosorption process was optimized in a batch system under Box-Behnken design. Second-order polynomial equation was successfully used to describe the effects of studied variables on response. The quadratic models exhibited higher R-2 values, significant p-values, and insignificant lack-of-fit p-values showed high adequacy for predicting the response. Chemically modified red alga exhibited better AB25 dye biosorption capacity as compared to modified brown alga. Maximum dye removal efficiencies of 77.34, 71.28, 50.56, and 85.19% for P. australis, HCl-treated P. australis, J. adhaerens, and HCl-treated J. adhaerens, respectively, were obtained at optimal conditions. The surface modification on tested algal biomass was found to be strongly dependent on their cell wall constituents.

  • 146.
    Dano, Alexandre
    et al.
    UNS UPMC CNRS OCA, France.
    Praeg, Daniel
    OGS Ist Nazl Oceanog Geofis Sperimentale, Italy.
    Migeon, Sebastien
    UNS UPMC CNRS OCA, France.
    Augustin, Jean-Marie
    IFREMER, France.
    Ceramicola, Silvia
    OGS Ist Nazl Oceanog Geofis Sperimentale, Italy.
    Ketzer, João Marcelo
    Pontif Univ Rio Grande PUCRS, Brazil.
    Augustin, Adolpho Herbert
    Pontif Univ Rio Grande PUCRS, Brazil.
    Ducassou, Emmanuelle
    Univ Bordeaux 1, France.
    Mascle, Jean
    UNS UPMC CNRS OCA, France.
    Fluid Seepage in Relation to Seabed Deformation on the Central Nile Deep-Sea Fan, Part 1: Evidence from Sidescan Sonar Data2014Inngår i: Submarine Mass Movements and their Consequences: 6th International Symposium / [ed] Krastel, S Behrmann, JH Völker, D Stipp, M Berndt, C Urgeles, R Chaytor, J Huhn, K Strasser, M Harbitz, CB, Springer, 2014, s. 129-139Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The central Nile Deep-Sea Fan contains a broad area of seabed destabilisation in association with fluid seepage: slope-parallel sediment undulations are associated with multibeam high-backscatter patches (HBPs) related to authigenic carbonates. During the 2011 APINIL campaign, a deep-towed sidescan and profiling system (SAR) was used to acquire high-resolution data along three transects across water depths of 1,700-2,650 m. Three seabed domains are distinguished, all developed within stratified sediments overlying mass-transport deposits (MTDs). Upslope of the undulations (<1,950 m), sidescan HBPs record focused fluid seepage via seabed cracks. In the western area of undulations, sidescan HBPs are distinct from intermediate-backscatter patches (IBPs) that extend up to 850 m parallel to the undulations, mainly along their downslope flanks; some contain sub-circular HBPs up to 300 m wide, three associated with smaller (<10 m) hydroacoustic gas flares. Focused fluid seeps are inferred to have shifted over time to form elongate carbonate pavements, preferentially along the footwalls of faults beneath the undulations that provide pathways for fluid flow. In contrast, in the eastern area of undulations, sidescan imagery reveal only slope-transverse furrows formed by turbulent flows, interpreted to indicate that fossil carbonates sampled during submersible operations have been exhumed by erosion.

  • 147.
    Das, Supriyo Kumar
    et al.
    Linnéuniversitetet, Fakultetsnämnden för naturvetenskap och teknik, Institutionen för naturvetenskap, NV.
    Bendle, James
    Routh, Joyanto
    Evaluating branched tetraether lipid-based palaeotemperature proxies in an urban, hyper-eutrophic polluted lake in South Africa2012Inngår i: Organic Geochemistry, ISSN 0146-6380, E-ISSN 1873-5290, Vol. 53, s. 45-51Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    We evaluate the application of the branched glycerol dialkyl glycerol tetraether (br GDGT) based palaeotemperature and palaeoenvironmental proxy to a hyper-eutrophic, polluted and shallow oxic lake. Lake Zeekoevlei is the largest freshwater lake in South Africa, located close to Cape Town. We use published lake-based and soil-based calibration equations, and compare the reconstructed mean annual air temperature (MAT) with regional (South African) and local (Cape Town) instrumental temperature records. The distribution of br GDGTs in the lake sediments is influenced by air temperature. The lake-based calibration equation, which uses the methylation index of branched tetraethers/cyclisation ratio of branched tetraethers (MBT/CBT), formulated for African lakes (. Tierney et al., 2010), fits well with the instrumental temperature records. Moreover, the CBT-derived pH likely reflects historic socioeconomic changes in catchment. Our results suggest that a polluted/hyper-eutrophic status and shallow water urban setting do not preclude application of the MBT/CBT-MAT proxy. However, further research is necessary to understand the behaviour of br GDGT-producing bacteria in polluted and highly productive lakes. © 2012 Elsevier Ltd.

  • 148.
    Davidsson, Åsa
    et al.
    Lund University.
    Eriksson, Eva
    Technical University of Denmark, Denmark.
    Fick, Jerker
    Umeå University.
    Ozonation and Thermal Pre-Treatment of Municipal Sewage Sludge: Implications for Toxicity and Methane Potential2013Inngår i: Journal of Residuals Science and Technology, ISSN 1544-8053, E-ISSN 2376-578X, Vol. 10, nr 2, s. 85-91Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The aim of this study was to determine effects on methane potential and overall sludge quality from two different sludge pre-treatment technologies (ozonation high/low dosage and thermal treatment 55/70 degrees C). In general both treatments produced increased methane potential. Thermal treatment resulted in higher chemical oxygen demand (COD)-solubilisation, while the highest volatile fatty acids (VFA) increase was obtained with ozonation. Sludges had inhibiting effects in a barley seed germination assay and a yeast oestrogen screen both before and after pre-treatment, but inhibition was reduced by ozone treatment and digestion. No statistical significant reduction in concentrations of included pharmaceuticals could be observed.

  • 149.
    Davidsson, Åsa
    et al.
    Lund University.
    Kjerstadius, Hamse
    Lund University.
    Haghighatafshar, Salar
    Lund University.
    Fick, Jerker
    Umeå University.
    Olsson, Mikael Emil
    Technical University of Denmark, Denmark.
    Wachtmeister, Hilla
    Technical University of Denmark, Denmark.
    Eriksson, Eva
    Technical University of Denmark, Denmark.
    Ia Cour Jansen, J.
    Lund University.
    Effect of anaerobic digestion at 35, 55 and 60 °C on pharmaceuticals and organic contaminants2014Inngår i: Water Science and Technology, ISSN 0273-1223, E-ISSN 1996-9732, Vol. 69, nr 6, s. 1282-1288Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The application of treated sewage sludge on farmland is a suggested method for recycling nutrients and reducing demand for commercial fertilizer. However, sludge needs to be safe from possible contaminants which can cause acute and long-term health and environmental problems. Residual pharmaceuticals and organic contaminants are mentioned as emerging threats since wastewater treatment plants are not designed to degrade these substances. The aim of this study was to screen and evaluate the presence, and reduction, of pharmaceuticals and polycyclic aromatic hydrocarbons (PAHs) during anaerobic digestion of mixed primary and waste-activated sludge at 35, 55 and 60°C and during pasteurization at 70°C. The study showed the difficulty of analysing pharmaceutical compounds in low concentrations in the sludge matrix. No general reduction of these compounds was seen during treatment, but for individual substances some reduction occured. The PAHs were generally not reduced during digestion or pasteurization, but for three substances (indeno[1,2,3-cd]pyrene and dibenzo[a,h]anthracene (analysed together) and benzo[g,h,i]perylene) reduction (up to 60%) during digestion was seen. Digestion at 35 and 55°C resulted in about the same order of reduction of the three individual PAHs, which was higher than for digestion at 60°C.

  • 150.
    Davydov, Roman
    et al.
    Peter the Great St. Petersburg Polytechnic University, Russia.
    Sokolov, Michael
    All-Russian Research Institute of Phytopathology, Russia.
    Hogland, William
    Linnéuniversitetet, Fakulteten för Hälso- och livsvetenskap (FHL), Institutionen för biologi och miljö (BOM).
    Glinushkin, A.
    All Russian Res Inst Phytopathol, Russia.
    Markaryan, A.
    The application of pesticides and mineral fertilizers in agriculture2018Inngår i: MATEC Web of Conferences, EDP Sciences, 2018Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Regulation of using pesticides and agrochemicals application in agriculture is one of the important problem now, as also the problem of storage of mineral fertilizers and their improper using, which have negative influence on the chemical and the food security of the country. This paper discusses the features and benefits of monodisperse aerosols of pesticides in plant protection after a long-term research. A new line of development of science, engineering, industrial and innovative technologies-the author's project "Monodisperse Anthropogenic Aerosols" is proposed. The measures for its implementation are presented. © The Authors, published by EDP Sciences, 2018.

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