title: Persistence of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/F) in Ya-Er Lake area, China.
abstract: The concentrations of polychlorinaxed dibenzo-p-dioxins and dibenzofurans (PCDD/F) in surface sediment, soil, human hair, and fish muscle from Ya-Er Lake area, China, were analyzed. The results showed that there were very high concentrations of PCDD/F existing in these samples. The results also indicated that Ya-Er Lake, which received a large amount of waste water from a nearby chloroalkali plant, was heavily polluted by PCDD/F. The present study demonstrated that those congeners, which possess at least three chlorine atoms in the lateral position with a fourth chlorine atom in the neighborhood bond of the third single chlorine atom, such as 1,2,7,8-TCDF and 2,3,6,7-TCDF, were very resistant to biodegradation due to the "neighbor effect" of every two chlorine atoms. The present study suggested that human hair may be a suitable alternative bioindicator for detecting PCDD/F exposure.
authors.affiliation: State Key Laboratory for Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072, China. wuwz@ihb.ac.cn
authors.forename: W Z
authors.initials: WZ
authors.lastname: Wu
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: K W
authors.initials: KW
authors.lastname: Schramm
authors.forename: A
authors.initials: A
authors.lastname: Kettrup
mesh_terms: D000818:Animals; D001572:Benzofurans / Q000032:analysis / Q000378:metabolism / Q000493:pharmacokinetics*; D001673:Biodegradation, Environmental; D000072338:Dibenzofurans, Polychlorinated; D004784:Environmental Monitoring / Q000379:methods; D005399:Fishes; D019015:Geologic Sediments / Q000737:chemistry; D006197:Hair / Q000737:chemistry; D006801:Humans; D018482:Muscle, Skeletal / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives / Q000032:analysis / Q000378:metabolism / Q000493:pharmacokinetics*; D012989:Soil Pollutants / Q000032:analysis*; D014018:Tissue Distribution
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D012989:Soil Pollutants