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Geochemical partitioning of Cu and Ni in mangrove sediments: Relationships with their bioavailability

DRS at CSIR-National Institute of Oceanography

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Title Geochemical partitioning of Cu and Ni in mangrove sediments: Relationships with their bioavailability
 
Creator Chakraborty, P.
Ramteke, D.
Chakraborty, S.
 
Subject GEOLOGY AND GEOPHYSICS
 
Description Sequential extraction study was performed to determine the concentrations of non-residual metal-complexes in the mangrove sediments from the Divar Island, (west coast of India). Accumulation of metal in the mangrove roots (from the same location) was determined and used as an indicator of bioavailability of metal. An attempt was made to establish a mechanistic linkage between the non-residual metal complexes and their bioavailability in the mangrove system. The non-residual fractions of Cu and Ni were mainly associated with Fe/Mn oxyhydroxide and organic phases in the sediments. A part of these metal fractions were bioavailable in the system. These two phases were the major controlling factors for Ni speciation and their bioavailability in the studied sediments. However, Cu was found to interact more strongly with the organic phases than Ni in the mangrove sediments. Organic phases in the mangrove sediments acted as buffer to control the speciation and bioavailability of Cu in the system.
 
Date 2015-08-24T09:40:31Z
2015-08-24T09:40:31Z
2015
 
Type Journal Article
 
Identifier Marine Pollution Bulletin, vol.93(1-2); 2015; 194-201
http://drs.nio.org/drs/handle/2264/4753
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2015] Elsevier
 
Publisher Elsevier