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Ketzer, João MarceloORCID iD iconorcid.org/0000-0003-4796-8177
Publications (10 of 35) Show all publications
Cedeno, D. G., Conceicao, R. V., Wilbert de Souza, M. R., Schimdt Quinteiro, R. V., Carniel, L. C., Ketzer, J. M., . . . Bruzza, E. d. (2019). An experimental study on smectites as nitrogen conveyors in subduction zones. Applied Clay Science, 168, 409-420
Open this publication in new window or tab >>An experimental study on smectites as nitrogen conveyors in subduction zones
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2019 (English)In: Applied Clay Science, ISSN 0169-1317, E-ISSN 1872-9053, Vol. 168, p. 409-420Article in journal (Refereed) Published
Abstract [en]

We performed high pressure and high temperature (HPHT) experiments on NH4-doped montmorillonite (similar to 2 wt % of NH4) under pressures of 2.5, 4.0, and 7.7 GPa and temperatures from 200 to 700 degrees C. Each experiment was analyzed with XRD, FTIR, CHN elemental analysis, and SEM in order to determine the NH4-Smectite phase changes and their morphology, and the presence of ammonium in the runs. Our results show that smectite can easily transport nitrogen, speciated as ammonium (NH4+), incorporated into the smectite interlayer in mildly reducing environments to deeper levels in the Earth through cold thermal regime subduction zones. NH4-Smectite transforms into NH4-enriched micaceous phase (tobelite) through a NH4+-enriched interlayered I/S phase in relatively low pressures and temperatures (around 2.5 GPa and 500 degrees C). Tobelite is stable until more extreme conditions (7.7 GPa and 700 degrees C), together with lesser amounts of buddingtonite (an ammonium-bearing feldspar) kyanite, and garnet. Our experiments also show the effect of nitrogen in the feldspar stability, as potassic and sodic feldspar are stable up to similar to 5 GPa, while buddingtonite, is observed to be stable up to 7.7 GPa. Nitrogen can return to the surface once the stability of these nitrogen-enriched minerals is reached due to pressure or temperature increasing.

Place, publisher, year, edition, pages
Elsevier, 2019
Keywords
Nitrogen, Subduction zones, Ammonium, Pelagic sediments
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
urn:nbn:se:lnu:diva-80729 (URN)10.1016/j.clay.2018.11.006 (DOI)000455692700044 ()
Available from: 2019-02-20 Created: 2019-02-20 Last updated: 2019-02-20Bibliographically approved
Rodrigues, L., Ketzer, J. M., Oliveira, R., dos Santos, V., Augustin, A., Cupertino, J., . . . Dorle, W. (2019). Molecular and Isotopic Composition of Hydrate-Bound, Dissolved and Free Gases in the Amazon Deep-Sea Fan and Slope Sediments, Brazil. Geosciences, 9(2), 1-15, Article ID 73.
Open this publication in new window or tab >>Molecular and Isotopic Composition of Hydrate-Bound, Dissolved and Free Gases in the Amazon Deep-Sea Fan and Slope Sediments, Brazil
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2019 (English)In: Geosciences, ISSN 2076-3263, Vol. 9, no 2, p. 1-15, article id 73Article in journal (Refereed) Published
Abstract [en]

In this work, we investigated the molecular stable isotope compositions of hydrate-bound and dissolved gases in sediments of the Amazon deep-sea fan and adjacent continental slope, Foz do Amazonas Basin, Brazil. Some cores were obtained in places with active gas venting on the seafloor and, in one of the locations, the venting gas is probably associated with the dissociation of hydrates near the edge of their stability zone. Results of the methane stable isotopes (δ13C and δD) of hydrate-bound and dissolved gases in sediments for the Amazon fan indicated the dominant microbial origin of methane via carbon dioxide reduction, in which 13C and deuterium isotopes were highly depleted (δ13C and δD of −102.2% to −74.2% V-PDB and −190 to −150% V-SMOW, respectively). The combination of C1/(C2+C3) versus δ13C plot also suggested a biogenic origin for methane in all analysed samples (commonly >1000). However, a mixture of thermogenic and microbial gases was suggested for the hydrate-bound and dissolved gases in the continental slope adjacent to the Amazon fan, in which the combination of chemical and isotopic gas compositions in the C1/(C2+C3) versus δ13C plot were <100 in one of the recovered cores. Moreover, the δ13C-ethane of −30.0% indicates a thermogenic origin.

Place, publisher, year, edition, pages
MDPI, 2019
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
urn:nbn:se:lnu:diva-80085 (URN)10.3390/geosciences9020073 (DOI)
Available from: 2019-01-31 Created: 2019-01-31 Last updated: 2019-02-20Bibliographically approved
Iglesias, R. S., Ketzer, J. M., Maraschin, A. J. & Sbrissa, G. (2018). Characterization and modeling of CO2‐water‐rock interactions in Hygiene Sandstones (Upper Cretaceous), Denver Basin, aimed for carbon dioxide geological storage. Greenhouse Gases: Science and Technology, 8(4), 781-795
Open this publication in new window or tab >>Characterization and modeling of CO2‐water‐rock interactions in Hygiene Sandstones (Upper Cretaceous), Denver Basin, aimed for carbon dioxide geological storage
2018 (English)In: Greenhouse Gases: Science and Technology, E-ISSN 2152-3878, Vol. 8, no 4, p. 781-795Article in journal (Refereed) Published
Abstract [en]

Carbon capture and geological storage are among the most valuable technologies capable of reducing CO2 emissions. Long‐term interactions between CO2 and a reservoir, and the integrity of geological formations, are key factors in the selection of adequate reservoirs for permanent storage. Numerical models of CO2‐water‐rock geochemical interactions are often employed to predict the fate of CO2 stored in a reservoir over time. The Hygiene Sandstone, in the Denver Basin, Colorado, USA, is a geological formation with potential for CO2 storage, and was therefore studied in this work, in which we collected and characterized outcrop samples in order to supply the input parameters for numerical simulations. Four representative thin sections of Hygiene Sandstone outcrops were quantified in terms of detrital constituents, diagenesis, and porosity on the basis of conventional petrography. Sandstone mineralogy included, in decreasing order, quartz, K‐feldspar, muscovite, albite, illite, smectite, kaolinite, poikilotopic calcite, and siderite. Porosity ranged from 4% to 13%. A geochemical modeling study of CO2‐water‐rock interactions performed with two characterized samples and brine data from the Hygiene Sandstones, simulating reservoir conditions, suggested that the mineralogy of the sandstone is quite stable under the conditions that were tested and only minor mineralogical and porosity alterations would occur within a thousand years of storage.

Place, publisher, year, edition, pages
Wiley-Blackwell, 2018
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science
Identifiers
urn:nbn:se:lnu:diva-75696 (URN)10.1002/ghg.1788 (DOI)000440549700012 ()
Available from: 2018-06-12 Created: 2018-06-12 Last updated: 2019-02-22Bibliographically approved
da S. Ramos, A., de Araujo, G. E., Siviero, L., Ketzer, J. M., Heemann, R., Lourega, R. V. & Rodrigues, L. F. (2018). Comparative assessment between different sample preparation methodologies for PTGA CO2 adsorption assays—Pellet, powder, and fragment samples. Adsorption Science and Technology, 36(7-8), 1441-1455
Open this publication in new window or tab >>Comparative assessment between different sample preparation methodologies for PTGA CO2 adsorption assays—Pellet, powder, and fragment samples
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2018 (English)In: Adsorption Science and Technology, ISSN 0263-6174, E-ISSN 2048-4038, Vol. 36, no 7-8, p. 1441-1455Article in journal (Refereed) Published
Abstract [en]

The carbon dioxide sorption process at coal seams is very important for understanding the trapping mechanisms of carbon capture and storage. The gas retention capacity of coal seams can be estimated using indirect methods based on the adsorption/desorption isotherms obtained in the laboratory. However, the gas sorption capacity can be overestimated or underestimated depending on the sample preparation. This work evaluates different sample preparations and their theoretical adsorption capacity using coal samples from the Cambui coal field (Parana Basin), southern Brazil. Experiments using a thermogravimetric balance were done to calculate the theoretical adsorption capacity, while sample characterization was done through immediate analysis, elementary analysis, and mineralogical studies. The sample preparations used in this work were powder, pellets, and fragments. While the powder form presents an average behavior, without any experimental complication, the pellet is extremely sensitive to any variation in the sample preparation, such as fractures, and the fragment requires a much longer experiment time than the other sample preparations, being impracticable for some cases.

Place, publisher, year, edition, pages
Sage Publications, 2018
Keywords
Thermogravimetric balance, coal, carbon dioxide, adsorption, Pressurized ThermoGravimetric Analyzer (PTGA)
National Category
Analytical Chemistry
Research subject
Natural Science, Chemistry
Identifiers
urn:nbn:se:lnu:diva-74747 (URN)10.1177/0263617418779459 (DOI)
Available from: 2018-05-30 Created: 2018-05-30 Last updated: 2019-02-22Bibliographically approved
Engelmann, P. d., dos Santos, V. H., Barbieri, C. B., Augustin, A. H., Ketzer, J. M. & Rodrigues, L. F. (2018). Environmental monitoring of a landfill area through the application of carbon stable isotopes, chemical parameters and multivariate analysis. Waste Management, 76, 591-605
Open this publication in new window or tab >>Environmental monitoring of a landfill area through the application of carbon stable isotopes, chemical parameters and multivariate analysis
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2018 (English)In: Waste Management, ISSN 0956-053X, E-ISSN 1879-2456, Vol. 76, p. 591-605Article in journal (Refereed) Published
Abstract [en]

Leachate produced during an organic matter decomposition process has a complex composition and can cause contamination of surface and groundwaters adjacent to a landfill area. The monitoring of these areas is extremely important for the characterization of the leachate produced and to avoid or mitigate environmental damages. Thus, the present study has the objective of monitoring the area of a Brazilian landfill using conventional parameters (dissolved metals and anions in water) and alternative, stable carbon isotopes parameters (δ13C of dissolved organic and inorganic carbons in water) in addition to multivariate analysis techniques. The use of conventional and alternative parameters together with multivariate analysis showed that cells of the residues are at different phases of stabilization of the organic matter and probably already at C3 of the methanogenic phase of decomposition. In addition, the data showed that organic matter stabilization ponds present in the landfill are efficient and improve the quality of the leachate. Enrichment of the heavy 13C isotope in both surface and groundwater suggested contamination in two sampling sites.

National Category
Earth and Related Environmental Sciences
Research subject
Natural Science
Identifiers
urn:nbn:se:lnu:diva-74540 (URN)10.1016/j.wasman.2018.02.027 (DOI)
Available from: 2018-05-25 Created: 2018-05-25 Last updated: 2019-02-22Bibliographically approved
Ketzer, J. M., Augustin, A., Rodrigues, L. F., Oliveira, R., Praeg, D., Gomez Pivel, M. A., . . . Leonel, B. (2018). Gas seeps and gas hydrates in the Amazon deep-sea fan. Geo-Marine Letters, 38(5), 429-438
Open this publication in new window or tab >>Gas seeps and gas hydrates in the Amazon deep-sea fan
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2018 (English)In: Geo-Marine Letters, ISSN 0276-0460, E-ISSN 1432-1157, Vol. 38, no 5, p. 429-438Article in journal (Refereed) Published
Abstract [en]

Deep-sea fans have been proposed to act as carbon sinks, rapid deposition driving shallow methanogenesis to favor net storage within the gas hydrate stability zone (GHSZ). Here, we present new evidence of widespread gas venting from the GHSZ on the upper Amazon deep-sea fan, together with analyses of the first samples of gas hydrates recovered offshore NE Brazil. Multibeam water column and seafloor imagery over an 18,000-km2 area of the upper Amazon fan reveal 53 water column gas plumes, rising from venting features in water depths of 650–2600 m. Most gas vents (60%) are located along seafloor faults that record the ongoing gravitational collapse of the fan above deep décollements, while others (40%) are located in water depths of 650–715 m within the upper edge of the GHSZ. Gas compositions from hydrates recovered in vents at three locations on and north of the fan indicate biogenic sources (dominantly methane with 2–15% of CO2; δ13C from − 81.1 to − 77.3‰), whereas samples from vents adjacent to the fan proper include possible thermogenic contributions (methane 95%, CO2 4%, and ethane 1%; δ13C – 59.2‰). These results concur with previous findings that the upper edge of the GHSZ may be sensitive to temporal changes in water temperatures, but further point to the importance of gas escape from within areas of gas hydrate stability. Our results suggest the role of fluid migration along pathways created by faulting within rapidly deposited passive margin depocenters, which are increasingly recognized to undergo gravitational collapse above décollements. Our findings add to evidence that gas can escape from sediments to the sea in areas where gas hydrates are stable on passive margins, and suggest the need of further studies of the dynamics of deep-sea depocenters in relation to carbon cycling.

Place, publisher, year, edition, pages
Springer, 2018
National Category
Earth and Related Environmental Sciences
Research subject
Natural Science
Identifiers
urn:nbn:se:lnu:diva-77182 (URN)10.1007/s00367-018-0546-6 (DOI)000446101900004 ()
Available from: 2018-08-17 Created: 2018-08-17 Last updated: 2019-02-22Bibliographically approved
Schütz, M. K., Lopes, N. F., Cenci, A., Ketzer, J. M., Einloft, S., Dullius, J. & Ligabue, R. (2018). Influence of Alkaline Additives and Buffers on Mineral Trapping of CO2 under Mild Conditions. Chemical Engineering & Technology, 41(3), 573-579
Open this publication in new window or tab >>Influence of Alkaline Additives and Buffers on Mineral Trapping of CO2 under Mild Conditions
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2018 (English)In: Chemical Engineering & Technology, ISSN 0930-7516, E-ISSN 1521-4125, Vol. 41, no 3, p. 573-579Article in journal (Refereed) Published
Abstract [en]

Carbon dioxide (CO2) gas is the main contributor to climate change. CO2 storage in underground brines and oil‐field brines by mineral trapping has been considered as a promising alternative in order to reduce CO2 emissions. However, permanent storage of CO2 in stable carbonate minerals is greatly dependent on brine pH, being favored over an alkaline pH. The effect of alkaline additives (NaOH, KOH, CaO) and buffer solutions (NaHCO3/NaOH, Na2HPO4/NaOH, NH4Cl/NH4OH) on the mineral trapping of CO2 under mild conditions using a synthetic brine is investigated. The results indicate that both NaOH+NH4Cl/NH4OH and KOH+NH4Cl/NH4OH mixtures promote precipitation mainly of calcium carbonate (CaCO3).

National Category
Chemical Engineering
Research subject
Natural Science, Environmental Science
Identifiers
urn:nbn:se:lnu:diva-74539 (URN)10.1002/ceat.201600513 (DOI)
Available from: 2018-05-25 Created: 2018-05-25 Last updated: 2019-02-22Bibliographically approved
Medina-Silva, R., de Oliveira, R. R., Pivel, M. A. G., Borges, L. G. A., Simao, T. L. L., Pereira, L. M., . . . Giongo, A. (2018). Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean. Journal of Marine Systems, 178, 52-61
Open this publication in new window or tab >>Microbial diversity from chlorophyll maximum, oxygen minimum and bottom zones in the southwestern Atlantic Ocean
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2018 (English)In: Journal of Marine Systems, ISSN 0924-7963, E-ISSN 1879-1573, Vol. 178, p. 52-61Article in journal (Refereed) Published
Abstract [en]

Conspicuous physicochemical vertical stratification in the deep sea is one of the main forces driving microbial diversity in the oceans. Oxygen and sunlight availability are key factors promoting microbial diversity throughout the water column. Ocean currents also play a major role in the physicochemical stratification, carrying oxygen down to deeper zones as well as moving deeper water masses up towards shallower depths. Water samples within a 50-km radius in a pockmark location of the southwestern Atlantic Ocean were collected and the prokaryotic communities from different water depths - chlorophyll maximum, oxygen minimum and deep-sea bottom (down to 1355 m) - were described. At phylum level, Proteobacteria were the most frequent in all water depths, Cyanobacteria were statistically more frequent in chlorophyll maximum zone, while Thaumarchaeota were significantly more abundant in both oxygen minimum and bottom waters. The most frequent microorganism in the chlorophyll maximum and oxygen minimum zones was a Pelagibacteraceae operational taxonomic unit (OTU). At the bottom, the most abundant genus was the archaeon Nitrosopurnilus. Beta diversity analysis of the 16S rRNA gene sequencing data uncovered in this study shows high spatial hetero-geneity among water zones communities. Our data brings important contribution for the characterisation of oceanic microbial diversity, as it consists of the first description of prokaryotic communities occurring in different oceanic water zones in the southwestern Atlantic Ocean.

Place, publisher, year, edition, pages
Elsevier, 2018
Keywords
Epipelagic, Mesopelagic, Bathypelagic, Metabarcoding, 16S rRNA, Vertical stratification, Pockmark
National Category
Biological Sciences
Research subject
Ecology, Aquatic Ecology
Identifiers
urn:nbn:se:lnu:diva-71131 (URN)10.1016/j.jmarsys.2017.10.008 (DOI)000418215000005 ()
Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2019-02-22Bibliographically approved
Siqueira, T. A., Iglesias, R. S. & Ketzer, J. M. (2017). Carbon dioxide injection in carbonate reservoirs: a review of CO2-water-rock interaction studies. Greenhouse Gases: Science and Technology, 7(5), 802-816
Open this publication in new window or tab >>Carbon dioxide injection in carbonate reservoirs: a review of CO2-water-rock interaction studies
2017 (English)In: Greenhouse Gases: Science and Technology, E-ISSN 2152-3878, Vol. 7, no 5, p. 802-816Article in journal (Refereed) Published
Abstract [en]

Carbon dioxide injection in geological formations is currently a common procedure in several reservoirs worldwide. More recently, it has been considered a permanent storage solution, avoiding emission to the atmosphere from large industrial sources. Also, it is largely employed in the oil & gas exploration industry, for enhanced oil recovery (EOR) operations. However, it is a known fact that injection of large amounts of CO2 into geological reservoirs may lead to a series of alterations due to chemical and physical interactions with minerals and fluids, especially in carbonate or carbonate-rich reservoirs. Experimental and numerical models have been employed in many studies in the past, to investigate these effects on the geological environment. So far, most of these studies focused on siliciclastic formations, whereas carbonate reservoirs, which are known to be much more chemically reactive when interacting with CO2, were much less investigated. We present a review of experimental and numerical models that have been employed for studying CO2-water-rock interactions, and their application to the investigation of the impact in carbonate reservoir quality and integrity caused by the injection of carbon dioxide.

National Category
Earth and Related Environmental Sciences
Research subject
Natural Science
Identifiers
urn:nbn:se:lnu:diva-71483 (URN)10.1002/ghg.1693 (DOI)
Available from: 2018-03-12 Created: 2018-03-12 Last updated: 2019-02-22Bibliographically approved
dos Santos, V. H. M., Ketzer, J. M. & Rodrigues, L. F. (2017). Classification of Fuel Blends Using Exploratory Analysis with Combined Data from Infrared Spectroscopy and Stable Isotope Analysis. Energy & Fuels, 31(1), 523-532
Open this publication in new window or tab >>Classification of Fuel Blends Using Exploratory Analysis with Combined Data from Infrared Spectroscopy and Stable Isotope Analysis
2017 (English)In: Energy & Fuels, ISSN 0887-0624, E-ISSN 1520-5029, Vol. 31, no 1, p. 523-532Article in journal (Refereed) Published
Abstract [en]

Chemometric tools were applied for exploratory analysis and classification of fuel blends using the combined information on Fourier transform infrared spectroscopy and stable isotope analysis through isotope ratio mass spectrometry. Principal component analysisand hierarchical clustering analysis were applied for exploratory analysis, while support vector machine (SVM) was used to classify the biodiesel/diesel blends. All of the chemometric models used present better results from the combination of spectral information with isotopic data for biodiesel contents of over 10% in the mixture, with the best results being Obtained from the SVM classification. Therefore, the development presented in this paper could become an important technique to improve the discrimination of the feedstock used in biodiesel production and a resource for quality control in industry.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2017
National Category
Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
urn:nbn:se:lnu:diva-75683 (URN)10.1021/acs.energyfuels.6b01937 (DOI)000392553800051 ()
Available from: 2018-06-12 Created: 2018-06-12 Last updated: 2019-02-22Bibliographically approved
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ORCID iD: ORCID iD iconorcid.org/0000-0003-4796-8177

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