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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
 
Creator Chakraborty, P.
Jayachandran, S.
Babu, P.V.R.
Karri, S.
Tyadi, P.
Yao, K.M.
Sharma, B.M.
 
Subject arsenic
adsorption
sediments
salinity
river discharge
 
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.
 
Date 2012-08-21T06:02:16Z
2012-08-21T06:02:16Z
2012
 
Type Journal Article
 
Identifier Chemical Geology, vol.322-323; 2012; 172-180
http://drs.nio.org/drs/handle/2264/4115
 
Language en
 
Rights An edited version of this paper was published by Elsevier. Copyright [2012] Elsevier
 
Publisher Elsevier