Organochlorine pesticides and polychlorinated biphenyls in surface water around Beijing
Organochlorine pesticides and polychlorinated biphenyls in surface water around Beijing
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北京周边地表水中有机氯农药和多氯联苯
DOI：
10.1007/s11356-016-7663-4
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发表时间：
2016
影响因子：
5.8
通讯作者：
ou
中科院分区：
文献类型：
--
作者：
Shao Yang;Han Shen;Ouyang Jie;Yang Guosheng;Liu Weihua;Ma Lingling;Luo Min;Xu Di;ou
调查了2015和2016两年夏季至冬季北京周边地表水中有机氯农药(OCPs)和多氯联苯(PCbs)的污染物浓度、来源、季节变化和生态毒理风险。∑有机氯农药和∑多氯联苯的浓度在L−1(L−1)的9.81~32.1ng(平均15.1%±77.78 ng)和L−1的7.41%~54.5ng(L−1的平均值21.3%±91.87%)之间。六六六(HCHs)是水相和颗粒相的主要污染物。至于多氯联苯，氯化程度较低的多氯联苯是主要污染物。六氯环己烷、二氯二苯基三氯乙烷和多氯联苯的组成表明，水中有机氯农药和多氯联苯的来源是研究地区历史上的使用情况。有机氯农药的季节变化明显，而多氯联苯的季节变化不明显。中国地表水水质未超标。密云水库是北京的主要饮用水来源，与美国环保局的癌症风险标准相比，密云水库的浓度低于风险水平。
Contaminant concentrations, sources, seasonal variation, and eco-toxicological risk of organochlorine pesticides (OCPs) and polychlorinated biphenyls (PCBs) in surface water around Beijing from summer to winter in 2015 and 2016 were investigated. The concentrations of ∑OCPs and ∑PCBs ranged from 9.81 to 32.1 ng L−1(average 15.1 ± 7.78 ng L−1) and from 7.41 to 54.5 ng L−1(average 21.3 ± 1.87 ng L−1), respectively. Hexachlorocyclohexane (HCHs) were the dominated contamination both in aqueous and particulate phase. For PCBs, lower chlorinated PCBs were the major contaminants. Compositions of HCHs, dichlorodiphenyltrichloroethane (DDTs), and PCBs indicated that the sources of OCPs and PCBs in water were due to historical usage in the study areas. For OCPs, there was an obvious variation among three seasons, while insignificant change was shown for PCBs. Water quality standards for China’s surface water were not exceeded in this study. Concentrations at Miyun Reservoir, the primary source of drinking water to Beijing, when compared to the USEPA’s criterion for cancer risk was below the level of risk.