| 引用本文: | 康跃惠,刘培斌,王子健,吕怡兵,李其军.北京官厅水库-永定河水系水体中持久性有机氯农药污染.湖泊科学,2003,15(2):125-132. DOI:10.18307/2003.0205 |
| KANG Yuehui,LIU Peibin,WANG Zijian,LV Yibing,LI Qijun.Persistent Organochlorinated Pesticides in Water from Guanting Reservoir and Yongdinghe River, Beijing. J. Lake Sci.2003,15(2):125-132. DOI:10.18307/2003.0205 |
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| 摘要: |
| 报道了官厅水库-永定河水系中持久性有机氯农药的污染水平,研究发现在水体中存在六六六(HCHs),滴滴涕(DDTs),七氯等在内的有机氯污染物,在所有13个采样点的水样中,18种有机氯农药的浓度为4.2-96.9 ng/L,其中六六六、滴滴涕的含量分别为0.09-53.5ng/L和nd-46.8 ng/L.对污染来源进行分析,发现除了主要是源于历史上农田中有机氯农药的残留外,近期可能有新的农药污染源进入水环境,如林丹和三氯杀螨醇的使用可能造成了新的有机氯农药污染.和国内主要河流相比,官厅水库-永定河水系中有机氯农药的污染属轻度污染. |
| 关键词: 官厅水库 永定河 有机氯农药 污染 空间分布 |
| DOI：10.18307/2003.0205 |
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| 基金项目:国家重点基础研究发展规划项目(NKBRSF-G1999045710)和北京市重大科技项目(9550610400)联合资助. |
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| Persistent Organochlorinated Pesticides in Water from Guanting Reservoir and Yongdinghe River, Beijing |
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KANG Yuehui1, LIU Peibin2, WANG Zijian1, LV Yibing1, LI Qijun2
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1.State Key Laboratory of Environmental Aquatic Chemistry, Research Center of Eco-environment Science, Chinese Academy of Sciences, Beijing 100085, P. R. China;2.Beijing H ydraulic Research Institute, Beijing 100044, P. R. China
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| Abstract: |
| In the paper, concentrations of 18 persistent organochlorinated pesticides in 12 water samples from Guanting Reservoir/Yongdinghe River Watershed, Beijing, were analyzed by using gas chromatography and electron capture detector (GC-ECD). Pentachloro-nitrobenzene (PCNB) was used as internal standard and 2,4,5,6-tetrachloro-m-xylene (TMX) and PCB-209 were used as surrogate. The method recoveries were ranged from 85% to 110%,with a standard d eviation less than 10%. Persistent organic pollutants, such as HCHs, DDTs, and heptachlor were detected in the waters. Among 13 sampling locations, the total concentrations of 13 pesticides under investigation ranged from 4.2-96.9 ng/L. Among the 13 pesticides, concentration of HCHs and DDTs were 0.09-53.5ng/L and nd-46.8 ng/L, respectively. In comparison with concentrations of HCHs in other rivers in China, concentration of HCHs in this watershed were lower than those found in the Zhujiang River (Pearl River), Songhuajiang River, Haihe River and Baiyangdian Catchments and similar to those found in the Yangtze River and middle reaches of the Liaohe River. Concentrations of DDTs in this w atershed were higher than those found in the Zhujiang River and Haihe River and silimar to those found in the Yangtze River and Jiulongjiang River. The origins of organochlorinated pesticides in the watershed were investigated according to the geographical distribution and the isomers characteristics for HCHs and metabolites of DDTs. The ratios of a-HCH to g-HCH were ranged from 0.29-1.38 and indicated the new pollution sources in the watershed, for example the continual application of lindan. The origin of DDTs should come from industrial sources along the Yanghe River. For example, factories manufacturing organochlorinated pesticides in recent years could discharge wastewater-containing DDTs into the river. Our results showed that there were historical residues and recent discharges of organochlorinated pesticides into the watershed. |
| Key words: Guanting Reservoir Yongdinghe River chlorinated pesticides pollution spatial distribution |
