title: Relationship between the lability of sediment-bound Cd and its bioaccumulation in edible oyster.
abstract: 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 (3.2-12.2mgkg(-1)) even though the total concentration of Cd in the bottom sediment was low (0.17-0.49mgkg(-1)).
authors.affiliation: Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India. Electronic address: pchak@nio.org.
authors.forename: Parthasarathi
authors.initials: P
authors.lastname: Chakraborty
authors.affiliation: Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
authors.forename: Darwin
authors.initials: D
authors.lastname: Ramteke
authors.affiliation: Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
authors.forename: Sucharita
authors.initials: S
authors.lastname: Chakraborty
authors.affiliation: Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
authors.forename: Kartheek
authors.initials: K
authors.lastname: Chennuri
authors.affiliation: Geological Oceanography Division, CSIR-National Institute of Oceanography, Dona Paula, Goa 403004, India.
authors.forename: Pratirupa
authors.initials: P
authors.lastname: Bardhan
mesh_terms: D000818:Animals; D002104:Cadmium / Q000032:analysis / Q000493:pharmacokinetics*; D049896:Crassostrea / Q000378:metabolism*; D063366:Estuaries; D005506:Food Contamination; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D007194:India; D013816:Thermodynamics; D014329:Tropical Climate; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000493:pharmacokinetics*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium
keywords: Bioaccumulation of Cd; Cd accumulation in oyster; Cd-speciation; Lability and bioaccumulation; Lability of Cd-complexes