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Diagenesis and bioavailability of mercury in the contaminated sediments of Ulhas Estuary, India

DRS at CSIR-National Institute of Oceanography

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Title Diagenesis and bioavailability of mercury in the contaminated sediments of Ulhas Estuary, India
 
Creator Ram, A.
Borole, D.V.
Rokade, M.A.
Zingde, M.D.
 
Subject intertidal environment
pollution effects
lead isotopes
diagenesis
 
Description Sequential extraction of Hg was performed in a core collected from intertidal area in Ulhas Estuary in order to characterize the downward distribution and diagenetic behavior of Hg in a polluted estuary. Concentration of total Hg ranged between 0.46 and 6.40 mu g g sup(-1) with significant decrease in surficial sediment as a result of closing of two Hg-cell based chlor-alkali plants. Results of sequential extraction showed that >65% Hg was strongly bound to organo-sulphur and inorganic sulphide species that are not bioavailable. Flux of only 18.8% of Hg was found compared to its value deposited on sediment–water interface. Hence, it is concluded that there is no significant diagenetic remobilization of Hg in Ulhas Estuary. This core also has been analyzed for sup(210)Pb geochronology. The estimated sedimentation rate is 0.31 cm y sup(-1) in the present sampling region
 
Date 2009-11-10T11:28:25Z
2009-11-10T11:28:25Z
2009
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.58(11); 1685-1693
http://drs.nio.org/drs/handle/2264/3427
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2009] Elsevier
 
Publisher Elsevier