期刊
MARINE POLLUTION BULLETIN
卷 100, 期 1, 页码 344-351出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2015.08.027
关键词
Cd-speciation; Lability of Cd-complexes; Bioaccumulation of Cd; Cd accumulation in oyster; Lability and bioaccumulation
资金
- GEOSINKS project [PSC0106]
- CSIR
- UGC
A linkage between Cd speciation in sediments and its bioaccumulation in edible oyster (Crassostrea sp.) from a tropical estuarine system was established. Bioaccumulation of Cd in edible oyster increased with the increasing lability and dissociation rate constants of Cd-sediment complexes in the bottom sediments. Total Cd concentration in sediment was not a good indicator of Cd-bioavailability. Increasing trace metal competition in sediments increased lability and bioavailability of Cd in the tropical estuarine sediment Low thermodynamic stability and high bioavailability of Cd in the estuarine sediment were responsible for high bioaccumulation of Cd in edible oysters (3.2-12.2 mg kg(-1)) even though the total concentration of Cd in the bottom sediment was low (0.17-0.49 mg kg(-1)). (C) 2015 Elsevier Ltd. All rights reserved.
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