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An overview and assessment of the existing technological options for management and resource recovery from beach wrack and dredged sediments: An environmental and economic perspective
Maharaja Sayajirao Univ Baroda, India.ORCID iD: 0000-0001-7027-147X
Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science. (Environmental Engineering and Recovery)ORCID iD: 0000-0002-1903-760X
2022 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 302, article id 113971Article in journal (Refereed) Published
Sustainable development
SDG 6: Ensure availability and sustainable management of water and sanitation for all
Abstract [en]

The present work discusses the problems and management options of beach wrack and dredged sediments. Beach wrack and dredged sediments near the shores have affected the coastal ecosystem, badly. The piles of beach wrack residues might be a significant emitter of greenhouse gases (GHGs) and dredged sediment is a substantial source of heavy metals and other pollutants. The recovery of valuable resources such as metals and nutrients from these so-called "wastes" is a sustainable strategy to enhance the resilience of the coastal ecosystem and management. The beach wrack meadows can be a potential source for green energy production. Even the demand for biodegradable polymers can be supplied by utilizing the waste beach wracks. The residues of beach wrack species like Posidonia oceanica, Zostera marina, Ulva spc. and Enhalus acorodies can be very beneficial species in terms of economic growth. Red algae have been the most favored and efficient candidate for methane yield. In case of dredged sediment, dewatering of sediment is an essential step for successful resource extraction. Although, extraction methods are almost similar to that applied for soil treatment, which includes pretreatment, physical partitioning, washing, thermal treatment, biological extraction, and immobilization. The fractionation study can be a beneficial tool for determining the metal species present in the sediment. Immobilization techniques are successful but continuous monitoring is required. The vitrification technique is highly effective but very expensive. Thermal treatment is useful for volatile metals such as mercury (Hg), but costs are high. Biological extractions are comparatively cheap but time-consuming. Henceforth, very few extraction methods are available for sediment and required further advancement in this field.

Place, publisher, year, edition, pages
Elsevier, 2022. Vol. 302, article id 113971
Keywords [en]
Beach wrack, Nuisance, Resource recovery, Sediment mining, And sequential extraction
National Category
Environmental Sciences
Research subject
Natural Science, Environmental Science
Identifiers
URN: urn:nbn:se:lnu:diva-108351DOI: 10.1016/j.jenvman.2021.113971ISI: 000714693900001PubMedID: 34715612Scopus ID: 2-s2.0-85117800303Local ID: 2021OAI: oai:DiVA.org:lnu-108351DiVA, id: diva2:1617993
Available from: 2021-12-08 Created: 2021-12-08 Last updated: 2022-11-11Bibliographically approved

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Pal, DivyaHogland, William

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