State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
Environ Pollut. 2018 Aug;239:233-241. doi: 10.1016/j.envpol.2018.03.055. Epub 2018 Apr 12.
Between 1945 and 1983, China was the world's largest producer of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs), and the second largest producer of hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs). The provinces of Liaoning, Hebei, Tianjin, Shandong, and Jiangsu around the Yellow and Bohai Seas have a long history of production and usage of OCPs and PCBs. To investigate their residual concentration, distribution, risk level, and temporal degradation, 7 OCPs and 7 indicator PCBs were determined in surface soils collected around the Yellow and Bohai Seas. Residues of the 7 OCPs and 7 PCBs were in the range of 5.89-179.96 ng g dry weight (dw) and non-detectable (ND)-385.67 ng g dw, respectively. Tianjin and Hebei provinces recorded the highest concentrations of OCPs and PCBs, respectively. Moreover, OCPs residues had a significant relationship with agriculture and orchard land-use types, whereas PCBs residues occurred more in wasteland. Lifetime carcinogenic and non-carcinogenic risks of OCPs and PCBs through ingestion, inhalation, and dermal contact indicated that OCPs and PCBs residues in surface soils are at a low risk level.
1945 年至 1983 年期间，中国是世界上最大的有机氯农药（OCPs）和多氯联苯（PCBs）生产国，也是六氯环己烷（HCHs）和滴滴涕（DDTs）的第二大生产国。黄海和渤海周边的辽宁、河北、天津、山东和江苏等省有着生产和使用 OCPs 和 PCBs 的悠久历史。为了调查它们的残留浓度、分布、风险水平和时间降解情况，在黄海和渤海周边地区采集了表层土壤，对其中的 7 种 OCPs 和 7 种指示性 PCBs 进行了测定。7 种 OCPs 和 7 种 PCBs 的残留量范围分别为 5.89-179.96ng/g 干重（dw）和 ND-385.67ng/g dw。天津和河北省的 OCPs 和 PCBs 浓度最高。此外，OCPs 的残留量与农业和果园用地类型有显著关系，而 PCBs 的残留量则更多地出现在荒地。通过摄入、吸入和皮肤接触途径对 OCPs 和 PCBs 的终生致癌和非致癌风险进行评估表明，表层土壤中的 OCPs 和 PCBs 残留处于低风险水平。
