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Trace metal fractionation in the Pichavaram mangrove–estuarine sediments in southeast India after the tsunami of 2004
Central University of Bihar, India.
Jawaharlal Nehru University, India.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Jawaharlal Nehru University, India.
2013 (English)In: Environmental Monitoring & Assessment, ISSN 0167-6369, E-ISSN 1573-2959, Vol. 185, no 10, 8197-8213 p.Article in journal (Refereed) Published
Abstract [en]

The geochemistry of coastal sediments of southern India was altered after the tsunami in 2004. A five-step sequential extraction procedure was applied to assess the effects of tsunami on mobility and redistribution of selected elements (Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Zn). Ten surface sediments and three cores were analyzed for different metal fractions (exchangeable, carbonate, reduced, oxidized, and residual). Total metal concentrations increased in mangrove sediments after the tsunami, but their spatial distribution did not show significant variation (except Mn). The sediments were mixed by the tsunami, and there was lack of variation in metal concentrations in different fractions with depth (except Pb and Mn). High concentrations of Pb and Zn occurred in the oxide fractions, whereas Cu, Cr, Cd, and Ni were high in the organic and sulfide-rich fractions. Metals in the residual fraction (lattice bound) had the highest concentration suggesting their non-availability and limited biological uptake in the system. Most of the metals (except Mn) do not constitute a risk based on the different geochemical indices.

Place, publisher, year, edition, pages
Springer Verlag (Germany) , 2013. Vol. 185, no 10, 8197-8213 p.
Keyword [en]
Tsunami, Metals, Mangrove sediments, Bioavailability, Risk assessment
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-99398DOI: 10.1007/s10661-013-3167-6ISI: 000323836100021OAI: oai:DiVA.org:liu-99398DiVA: diva2:656925
Note

Funding Agencies|FORMAS||

Available from: 2013-10-17 Created: 2013-10-17 Last updated: 2017-12-06Bibliographically approved

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