title: Contaminant pattern and bioaccumulation of legacy and emerging organhalogen pollutants in the aquatic biota from an e-waste recycling region in South China.
abstract: Legacy pollutants, polychlorinated biphenyls (PCBs), dichlorodiphenyl trichloroethane and its metabolites (DDTs), and some emerging organhalogen pollutants, such as polybrominated diphenyl ethers (PBDEs), hexabromobenzene (HBB), pentabromotoluene (PBT), 2,3,4,5,6-pentabromoethyl benzene (PBEB), 1,2-bis (2,4,6-tribromophenoxy) ethane (BTBPE), and dechlorane plus (DP), were detected in an aquatic food chain (invertebrates and fish) from an e-waste recycling region in South China. Polychlorinated biphenyls, DDTs, PBDEs, and HBB were detected in more than 90% of the samples, with respective concentrations ranging from not detected (ND)-32,000 ng/g lipid weight, ND-850 ng/g lipid weight, 8 to 1,300 ng/g lipid weight, and 0.28 to 240 ng/g lipid weight. Pentabromotoluene, PBEB, BTBPE, and DP were also quantifiable in collected samples with a concentration range of ND-40 ng/g lipid weight. The elevated levels of PCBs and PBDEs in the organisms, compared with those in non-e-waste regions in South China, suggest that these two kinds of pollutants derived mainly from e-waste recycling practices. Hexabromobenzene was significantly correlated with PBDEs, implying that HBB come from the release of e-waste along with PBDEs and/or the pyrolysis of BDE209. Most of the compounds whose trophic magnification factor (TMF) could be calculated were found to biomagnify (TMF > 1). Hexabromobenzene was also found, for the first time, to biomagnify in the present food web, with a TMF of 2.1.
authors.affiliation: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xiao-Jun
authors.initials: XJ
authors.lastname: Luo
authors.forename: Jiang-Ping
authors.initials: JP
authors.lastname: Wu
authors.forename: Juan
authors.initials: J
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.forename: She-Jun
authors.initials: SJ
authors.lastname: Chen
authors.forename: Bi-Xian
authors.initials: BX
authors.lastname: Mai
mesh_terms: D000818:Animals; D002681:China; D003247:Conservation of Natural Resources; D003634:DDT / Q000493:pharmacokinetics; D004581:Electronics; D005411:Flame Retardants / Q000493:pharmacokinetics; D055768:Halogenated Diphenyl Ethers / Q000493:pharmacokinetics; D006846:Hydrocarbons, Halogenated / Q000493:pharmacokinetics*; D011078:Polychlorinated Biphenyls / Q000493:pharmacokinetics; D014874:Water Pollutants, Chemical / Q000493:pharmacokinetics*
chemical_list: D005411:Flame Retardants; D055768:Halogenated Diphenyl Ethers; D006846:Hydrocarbons, Halogenated; D014874:Water Pollutants, Chemical; D003634:DDT; D011078:Polychlorinated Biphenyls