大渡河瀑布沟水电站流域有机氯农药风险评价  

Risk Assessment of Organochlorine Pesticides in the Pubugou Hydropower Station Basin of Dadu River

作　　者：罗曼琳 徐威 田雨 钱磊 吴怡 LUO Manlin;XU Wei;TIAN Yu;QIAN Lei;WU Yi(Sichuan Academy of Eco-environmental Sciences,Chengdu 610041,China;Sichuan Province Environmental Protection Technology&Engineering Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]四川省生态环境科学研究院,四川成都610041 [2]四川省环保科技工程有限责任公司,四川成都610041

出　　处：《环境科学与技术》2024年第6期138-143,共6页Environmental Science & Technology

基　　金：2024年度四川省生态环境保护科技计划项目(2024HB01)。

摘　　要：作者在四川大渡河瀑布沟水电站流域布设17个地表水采样点位,通过索式提取后,对样品进行固相萃取和氮吹前处理,采用气相色谱-质谱仪对地表水中的有机氯农药含量进行测定,并进行分布特征及环境风险评价研究,以便为水电站的管理和环境保护提供科学建议。结果表明:丙体六六六、丁体六六六、硫丹硫酸酯、异狄氏剂、异狄氏剂醛、异狄氏剂酮、环氧七氯、艾氏剂、狄氏剂、硫丹检出率分别为5.88%、11.77%、5.88%、41.18%、35.29%、70.59%、11.77%、17.65%、17.65%、41.18%,其余指标均未检出;与已有研究相比,硫丹、丁体六六六处于较高水平,丙体六六六、异狄氏剂、环氧七氯处于中等水平,甲体六六六、乙体六六六、异狄氏剂醛、异狄氏剂酮处于较低水平;伍家湾点位环氧七氯超过《地表水环境质量标准》(GB 3838-2002)Ⅲ类标准,污染程度较为严重,艾氏剂、环氧七氯、狄氏剂、异狄氏剂、异狄氏剂醛、硫丹硫酸酯、异狄氏剂酮的健康风险不可接受,建议上述区域周边农田严格禁止该类农药的使用。Seventeen surface water sampling sites were set up in the Pubugou Hydropower Station Basin of Dadu River,Sichuan Province.After soxhlet extraction,the samples were extracted by solid phase extraction and nitrogen blowing treat⁃ment.The content of porganochlorine pesticides(OCPs)in the surface water was determined by gas chromatography-mass spectrometer,and the distribution characteristics and environmental risk assessment were studied,for the purpose to provide scientific advice for the management and environmental protection of hydropower stations.The results showed that the detec⁃tion rates ofγ-HCH,δ-HCH,endosulfan sulfat,endrin,endrin aldehyde,endrin ketone,heptachlor epoxide,aldrin,dieldrin and endosulfan were 5.88%,11.77%,5.88%,41.18%,35.29%,70.59%,11.77%,17.65%,17.65%,41.18%.The other indexes were not detected.Compared with previous studies,endosulfan andδ-HCH were at a high level,γ-HCH,isodieldrin and heptachloride epoxide were at a medium level,andα-HCH,β-HCH,isodieldrin aldehyde and isodieldrin ketone were at a low level.The heptachlor epoxide of Wujiawan point exceeded the categoryⅢof Environmental Quality Standard for Surface Water(GB 3838-2002),and the pollution was serious.OCPs components were detected and the carcinogenic risk was unacceptable.It is recommended to strictly prohibit the use of this pesticide in the farmland surrounding the sites.

关 键 词：地表水 有机氯农药 分布特征 风险评价 

分 类 号：X820.4[环境科学与工程—环境工程]