Intra-annual variations of arsenic totals and species in tropical estuary surface sediments
DRS at CSIR-National Institute of Oceanography
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Title |
Intra-annual variations of arsenic totals and species in tropical estuary surface sediments
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Creator |
Chakraborty, P.
Jayachandran, S. Babu, P.V.R. Karri, S. Tyadi, P. Yao, K.M. Sharma, B.M. |
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Subject |
arsenic
adsorption sediments salinity river discharge |
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Description |
Arsenic totals and species were found to vary during a one year period in the surface sediments of Godavari estuary (the third largest river in India). This study suggests that increasing salinity of overlying water column of sediments may alter the mobility of arsenic complexes in an estuarine system. The higher salt (NaCl) concentrations result in less arsenic adsorption to the sediment due to formation of weak arsenic complexes because of competition from Cl sup(-) ions or due to a reduction in interparticle attraction by the action of Na sup(+). It is suggested that controlled freshwater discharge (from a dam) in an estuary influences the salinity of surface water and can have significant impact on the distribution and speciation of arsenic in the sediments and water column in such system.
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Date |
2012-08-21T06:02:16Z
2012-08-21T06:02:16Z 2012 |
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Type |
Journal Article
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Identifier |
Chemical Geology, vol.322-323; 2012; 172-180
http://drs.nio.org/drs/handle/2264/4115 |
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Language |
en
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Rights |
An edited version of this paper was published by Elsevier. Copyright [2012] Elsevier
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Publisher |
Elsevier
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