Characteristics and transport of organochlorine pesticides in urban environment: air, dust, rain, canopy throughfall, and runoff.
Characteristics and transport of organochlorine pesticides in urban environment: air, dust, rain, canopy throughfall, and runoff.
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DOI：
10.1039/c0em00110d
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Wei Zhang;Y. Ye;D. Hu;Langbo Ou;Xuejun Wang
中科院分区：
文献类型：
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作者：
Wei Zhang;Y. Ye;D. Hu;Langbo Ou;Xuejun Wang
研究了有机氯农药在城市大气、沙尘、雨水、冠层穿透雨和径流水等多种环境中的迁移特征。大气和雨水中均以六氯环己烷（HCHs）为主，而滴滴涕（DDT）相关物质与粉尘的亲和力较高。空气、雨水和灰尘中DDT和DDE的浓度较高，说明环境中的技术滴滴涕正在降解，研究区可能存在未知的局部或区域性DDT排放源。来源识别结果表明，北京城区环境中DDTs具有新的特征，可能来源于偏远地区的大气迁移。沙尘、雨水、林冠穿透水和径流中α-/γ-HCH的比值接近1，表明林冠可能使用杀虫剂。径流中的OCPs来自各种来源，包括雨水，灰尘和冠层穿透雨。在径流中，DDTs和六氯苯（HCB）主要来自沙尘，HCHs主要来自降雨和冠层穿透雨。
Characteristics and transport of organochlorine pesticides (OCPs) in urban multiple environments, including air, dust, rain, canopy throughfall, and runoff water, are explored in this study. Hexachlorocyclohexanes (HCHs) dominated in both air and rain water, and dichlorodiphenyltrichloroethane (DDT) related substances showed a higher affinity to dust. Relatively high concentrations of DDT and dichlorodiphenyldichloroethylene (DDE) in air, rain and dust imply that technical DDT in the environment has been degrading, and there may be unknown local or regional emission sources that contain DDTs in the study area. Source identification showed that DDTs in Beijing urban environments with a fresh signature may originate from the atmospheric transport from remote areas. The ratio of α-/γ-HCH in dust, rain, canopy throughfall and runoff were close to 1, indicating the possible use of lindane. OCPs in runoff were transported from various sources including rain, dust, and canopy throughfall. In runoff, DDTs and hexachlorobenzene (HCB) were mainly transported from dust, and HCHs were mainly from rain and canopy throughfall.