北京地区地表水中OCPs和PCBs的污染分析

发布时间：2018-05-01 11:41

  本文选题：有机氯农药 + 多氯联苯　； 参考：《中国环境科学》2016年09期

【摘要】：在夏、冬两季对北京地区密云,潮白河,玉渊潭和通惠河等地表水中17种有机氯农药(OCPs)和84种多氯联苯(PCBs)的含量进行了分析及来源解析.实验结果表明,OCPs总量在7.86~53.1ng/L之间,平均值为(16.9±14.6)ng/L.PCBs总量在2.99~32.7ng/L之间,平均浓度为(10.9±10.4)ng/L.HCHs,硫丹,DDTs和HCB是主要的OCPs污染物,其含量分别为(13.9±11.5)ng/L,(2.20±2.01)ng/L,(0.63±1.51)ng/L和(0.12±0.14)ng/L.α-HCH/γ-HCH平均比值为1.53,小于工业HCH中比值4~7,表明北京地区地表水中存在林丹的使用.而DDT/(DDD+DDE)比值1.22,表明北京地区并无新的DDTs污染源输入环境.PCBs以低氯代联苯为主,其中二氯,三氯,四氯和五氯联苯总和占∑84PCBs总量的79.2%.北京地区地表水中不同氯取代数PCBs组成与我国历史PCB产品组成相符,均以低氯代联苯为主,表明北京地区地表水中PCBs污染来源为历史使用.相比于国内其他区域水质而言,北京地区地表水OCPs和PCBs污染水平较低.
[Abstract]:In summer and winter, the contents of 17 organochlorine pesticides (OCPs) and 84 polychlorinated biphenyls (PCBs) in surface water of Miyun, Chaobaihe, Yuyuantan and Tonghui in Beijing were analyzed and their sources were analyzed. The results showed that the total amount of OCPs was in the range of 7.86~53.1ng/L, the average value was 16.9 卤14.6)ng/L.PCBs, and the average concentration was 10.9 卤10.4 ng / L HCHs. Endosulfan DDTs and HCB were the main OCPs pollutants. The average ratios of 伪 -HCH / 纬 -HCH in surface water in Beijing area were 1.53, which were lower than that in industrial HCH, which indicated that the use of Lin Dan existed in surface water in Beijing area, and the average ratio of 伪 -HCH / 纬 -HCH was 1.53, which was 2.20 卤2.01ng 路L ~ (-1) 1.51)ng/L and 0.12 卤0.14ng / L ~ (-1) ~ (-1) ~ 0.12 卤0.14ng / L ~ (-1) respectively, which was lower than that in industrial HCH. However, the ratio of DDT/(DDD to DDE is 1.22, which indicates that there is no new DDTs pollution source in Beijing. The low chlorinated biphenyls (LCB) is the main input environment. The sum of dichloro, trichloro, tetrachlorobenzene and pentachlorobenzene accounts for 79.2% of 鈭，

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