title: Bioaccumulation of PCDD/Fs, PCBs and PBDEs by earthworms in field soils of an E-waste dismantling area in China.
abstract: A total of 60 paired samples of earthworm, corresponding soil and wormcast were collected to investigate the bioaccumulation tendency of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs), polychlorinated biphenyls (PCBs) and polybrominated diphenyl ethers (PBDEs) in earthworms from a typical E-waste dismantling area in east China. Significant correlations were observed for the total concentrations among different matrix types except for PCDD/Fs in soil and earthworm. The bioaccumulation tendency showed some differences among the contaminants. Calculated biota-soil accumulation factors (BSAFs) indicated that PCBs and PBDEs had higher bioaccumulation potential compared to PCDD/Fs, which was somewhat different from laboratory studies. The plot of mean BSAFs versus log Kow values for PCBs and PBDEs was well fitted by a second-order polynomial with the maximum BSAF at approximately log Kow of 6.5. While for PCDD/Fs, only a slightly decreasing trend was observed with increasing log Kow. Composition analysis indicated that tetra-, penta- and hexa-halogenated homologs had higher bioaccumulation levels, indicating that medium-halogenated congeners with log Kow around 6.5 are more easily accumulated by earthworms. Furthermore, the ratios of BDE-47/-99 and BDE-99/-100 showed some discrepancies with the technical products and other biotic species, suggesting different bioaccumulation potential of PBDEs in earthworm.
authors: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Hongtao
authors: H
authors: Shang
authors: Pu
authors: P
authors: Wang
authors: Thanh
authors: T
authors: Wang
authors: Yawei
authors: Y
authors: Wang
authors: Haidong
authors: H
authors: Zhang
authors: Jianjie
authors: J
authors: Fu
authors: Daiwei
authors: D
authors: Ren
authors: Weihai
authors: W
authors: Chen
authors: Qinghua
authors: Q
authors: Zhang
authors: Guibin
authors: G
authors: Jiang
mesh_terms: D000818:Animals; D001572:Benzofurans / Q000378:metabolism*; D002681:China; D059029:Electronic Waste; D004784:Environmental Monitoring; D055768:Halogenated Diphenyl Ethers / Q000378:metabolism*; D009835:Oligochaeta / Q000378:metabolism*; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000378:metabolism; D011108:Polymers / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D001572:Benzofurans; D055768:Halogenated Diphenyl Ethers; D000072317:Polychlorinated Dibenzodioxins; D011108:Polymers; D012987:Soil; D012989:Soil Pollutants; C016068:polychlorodibenzofuran; D011078:Polychlorinated Biphenyls