caa a22 4500 467904081 CHVBK 20180406152828.0 cr unu---uuuuu 170328e20061001xx s 000 0 eng 10.1007/s10661-005-9108-2 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9108-2 Metal Fractionation Studies in Surfacial and Core Sediments in the Achankovil River Basin in India [Elektronische Daten] [M. Prasad, A. Ramanathan, Sunil Shrivastav, Anshumali,, Rajinder Saxena] 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. Springer Science+Business Media, Inc., 2006 heavy metals nationallicence Achankovil River nationallicence selective sequential extraction nationallicence enrichment factor nationallicence anthropogenic factor nationallicence Prasad M. School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut Ramanathan A. School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut Shrivastav Sunil School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut Anshumali, School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut Saxena Rajinder Department of Earth Science, Uppsala University, Villavägen 16, SE-752 36, Uppsala, Sweden aut Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 77-102 0167-6369 121:1-3<77 2006 121 10661 https://doi.org/10.1007/s10661-005-9108-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9108-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Prasad M. School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut NATIONALLICENCE 700 1- Ramanathan A. School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut NATIONALLICENCE 700 1- Shrivastav Sunil School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut NATIONALLICENCE 700 1- Anshumali School of Environmental Sciences, Jawaharlal Nehru University, 110 067, New Delhi, India aut NATIONALLICENCE 700 1- Saxena Rajinder Department of Earth Science, Uppsala University, Villavägen 16, SE-752 36, Uppsala, Sweden aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Springer Netherlands 121/1-3(2006-10-01), 77-102 0167-6369 121:1-3<77 2006 121 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer