uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Metal fractionation studies in surfacial and core sediments in the Achankovil River basin in India
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
School of Environmental Sciences, Jawaharlal Nehru University, New Delhi, India.
Show others and affiliations
2006 (English)In: Environmental Monitoring & Assessment, ISSN 0167-6369, E-ISSN 1573-2959, Vol. 121, no 1-3, 77-102 p.Article in journal (Refereed) Published
Abstract [en]

The Fractionation of Fe, Zn, Cu, Pb, Mn and Cd in the sediments of the Achankovil River, Western Ghats, India using a sequential extraction method was carried out to understand the metal availability in the basin for biotic and abiotic activities. Spatial distribution of heavy metals has been studied. Sediment grain size has significant control over the heavy metal distribution. The fluctuations in their concentration partly depend upon the lithology of the river basin and partly the anthropogenic activities. The sediments are dominated by sand and are moderately to strongly positively skewed and are very leptokurtotic in nature. The quartzite and feldspars are abundant minerals along with significant amount of mica with low clay content. The core sediments show increasing trend of heavy metal concentration with depth due to the recent addition of anthropogenic sources and post-diagenic activities. Significant amount of Cd (18%) was found in carbonate fraction, which may pose environmental problems due to its toxic nature. Small concentrations of metals, except Cd and Cu, are in exchangeable fraction, which indicate low bio-availability. Enrichment Factor (EF) for individual metals shows the contribution from terrregious and in part from anthropogenic sources. Selective Sequential Extraction (SSE) study shows the variation in specific metal distribution pattern, their distribution in different phases and their bio-availability. Maximum amount of the metals were bound to the non-residual fractions (mainly Fe-oxides). Overall, bio-availability of these micronutrients from sediments seems to be very less. Non-residual phase is the most important phase for majority of heavy metals studied. Among the non-residual fraction, maximum amount of the heavy metals bound to Fe-oxides. The study high lights the need for in-depth study of heavy metals distribution and fractionation in the smaller river basins to get precise information on the behavior and transport of heavy metals in the fluvial environment and their contribution to the world ocean.

Place, publisher, year, edition, pages
2006. Vol. 121, no 1-3, 77-102 p.
Keyword [en]
heavy metals, Achankovil River, selective sequential extraction, enrichment factor, anthropogenic factor
National Category
Oceanography, Hydrology, Water Resources
URN: urn:nbn:se:uu:diva-18974DOI: 10.1007/s10661-005-9108-2ISI: 000241453500006PubMedID: 16758286OAI: oai:DiVA.org:uu-18974DiVA: diva2:46746
Available from: 2007-01-05 Created: 2007-01-05 Last updated: 2011-05-19Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textPubMed
By organisation
Air and Water Science
In the same journal
Environmental Monitoring & Assessment
Oceanography, Hydrology, Water Resources

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 155 hits
ReferencesLink to record
Permanent link

Direct link