广州市食用鱼体内PCBs和DDTs的残留水平及食用风险评估

doi:10.11978/j.issn.1009-5470.2014.05.011

Abstract

Abstract: Residual levels and composition profiles of polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane and its metabolites (DDTs) were determined in seven species of fish at a wholesale fish market in Guangzhou, China. Concentrations of PCBs and DDTs ranged from 71~1488 and 695~38044 pg·g^-1 (wet weight), respectively. Significant positive correlations existed between lipid contents in the fish and log normalized concentrations of PCBs and DDTs, implying that high lipid content is conducive to the enrichment of these contaminants. Significant differences in concentrations of PCBs and DDTs were observed in different fish species. PCB 28 and PCB 153 were the predominant congeners of PCBs; and 1,1-dichloro-2,2-bis-(p-chlorophenyl)ethylene, (p,p′-DDE) and 1,1-dichloro-2,2-bis-(p-chlorophenyl)ethane, (p,p′-DDD) were the dominant components of DDTs. We found that 81.3% of samples with values of (DDE+DDD)/∑DDTs larger than 0.5, indicating that DDTs in these fish were mainly derived from historical residue. The estimated daily intakes per person of PCBs and DDTs via fish consumption in Guangzhou were 1.93~71.9 and 23.0~1875.6 ng·d^-1, respectively.

Key words: polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT), edible fish in Guangzhou, residual level, health risk

CLC Number:

P762.3

HAO Qing, SUN Yu-xin, XU Xiang-rong, LUO Xiao-jun, WANG Shuai-long, ZHANG Zai-wang, MAI Bi-xian. Residual levels of PCBs and DDTs in wholesale fish in Guangzhou, China and potential health risks[J].Journal of Tropical Oceanography, 2014, 33(5): 84-91.

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Residual levels of PCBs and DDTs in wholesale fish in Guangzhou, China and potential health risks

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