Bioaccumulation of polychlorinated dibenzo-p-dioxins and dibenzofurans in the foodweb of Ya-Er Lake area, China.
Bioaccumulation of PCDD/F in the foodweb was investigated in the Ya-Er Lake area, which was heavily polluted by PCDD/F. The high concentrations of PCDD/F in sediment can be transferred and bioaccumulated by aquatic organisms and humans through various pathways. Benthonic invertebrate animals and aquatic plants with a lot of fibers in the root can accumulate PCDD/F from sediment and water. Snail (Bellamya aeruginosa), shrimp (Macrobranchium sp.) and freshwater mussel (Acuticosta chinensis (Lea)) took up PCDD/F from the water and maintained the emission patterns, whereas fish tended to selectively accumulate 2,3,7,8-substituted isomers. The tissues of fish-eating bird and duck (Anas platyrhynchos) were very highly contaminated by PCDD/F due to ingestion of fish and other aquatic organisms from sediment. The residual concentration in breast milk depended on the original concentration of PCDD/F in the food. A resident in Ya-Er Lake area showed a daily intake of PCDD/F of about 9.14 pg TEQ/kg body weight/day. This is higher than the tolerable daily intake (TDI) for PCDD/F (1 pg TEQ/kg body weight/day), which was recommended by the World Health Organization (WHO).
Wu
W Z
WZ
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, People's Republic of China. wuwz@ihb.ac.cn
Schramm
K W
KW
Kettrup
A
A
D000818:Animals; D001572:Benzofurans / Q000032:analysis* / Q000493:pharmacokinetics*; D001711:Biotransformation; D001717:Birds; D049872:Bivalvia / Q000378:metabolism; D002681:China; D033364:Decapoda / Q000378:metabolism; D004372:Ducks; D005260:Female; D005399:Fishes; D005618:Fresh Water / Q000032:analysis*; D019015:Geologic Sediments / Q000032:analysis*; D006801:Humans; D008895:Milk, Human / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis* / Q000493:pharmacokinetics*; D012908:Snails / Q000378:metabolism; D014874:Water Pollutants, Chemical / Q000032:analysis*
D001572:Benzofurans; D000072317:Polychlorinated Dibenzodioxins; D014874:Water Pollutants, Chemical; C023614:dibenzofuran