title: Bioconcentration of Ag, Cd, Co, Mn and Zn in the Mangrove Oyster (Crassostrea gasar) and Preliminary Human Health Risk Assessment: A Radiotracer Study.
abstract: Bioaccumulation kinetics of five dissolved metals were determined in the mangrove oyster Crassostrea gasar, using corresponding radiotracers ((54)Mn, (57)Co, (65)Zn, (109)Cd and (110m)Ag). Additionally, their bioaccessibility to human consumers was estimated. Results indicated that over a 14-day exposure (54)Mn and (57)Co were linearly concentrated in oysters whereas (109)Cd, (65)Zn and (110m)Ag were starting to saturate (steady-state not reached). Whole-body concentration factors at 14 days (CF14d in toto) ranged from 187 ± 65 to 629 ± 179 with the lowest bioconcentration capacity for Co and the highest for Ag. Depuration kinetics were best described by a double-exponential model with associated biological half-lives ranging from 26 days (Ag) to almost 8 months (Zn and Cd). Bioaccessible fraction of the studied elements was estimated using in vitro digestions, which suggested that oysters consumed seasoned with lemon enhanced the accessibility of Cd, Mn and Zn to human consumers, but not Ag and Co.
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco.|Nuclear Chemistry and Environmental Research Centre, National Nuclear Research Institute, Ghana Atomic Energy Commission, P. O. Box LG 80, Legon, Accra, Ghana.
authors.forename: Harriet
authors.initials: H
authors.lastname: Kuranchie-Mensah
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco.
authors.forename: Jean-Louis
authors.initials: JL
authors.lastname: Teyssié
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco.
authors.forename: François
authors.initials: F
authors.lastname: Oberhänsli
authors.affiliation: Bureau of Technical Support for Safety Regulation, Office of Atoms for Peace, Chatuchak, Bangkok, 10900, Thailand.
authors.forename: Yutthana
authors.initials: Y
authors.lastname: Tumnoi
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco.
authors.forename: Simon
authors.initials: S
authors.lastname: Pouil
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco.
authors.forename: Michel
authors.initials: M
authors.lastname: Warnau
authors.affiliation: Radioecology Laboratory, International Atomic Energy Agency - Environment Laboratories (IAEA-EL), 4a Quai Antoine Ier, 98000, Monaco, Principality of Monaco. m.metian@iaea.org.
authors.forename: Marc
authors.initials: M
authors.lastname: Metian
mesh_terms: D000818:Animals; D049896:Crassostrea / Q000737:chemistry*; D005506:Food Contamination / Q000032:analysis*; D006801:Humans; D019216:Metals, Heavy / Q000032:analysis*; D011868:Radioisotopes / Q000032:analysis; D018570:Risk Assessment; D012758:Shellfish / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis
chemical_list: D019216:Metals, Heavy; D011868:Radioisotopes; D014873:Water Pollutants
keywords: Bioaccumulation; Metals; Seafood safety; Tropical African bivalve