Organochlorine pesticide residues in surface water from Sichuan Basin to Aba Prefecture profile, east of the Tibetan Plateau  

作　　者：Hongxia LIU Ying HU Shihua QI Xinli XING Yuan ZHANG Dan YANG Chengkai QU 

机构地区：[1]State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, Wuhan 430074, China [2]Hubei Key Laboratory of Mine Environmental Pollution Control & Remediation, School of Environmental Science and Engineering, Hubei Polytechnic University, Huangshi 435003, China [3]Faculty of Engineering, China University of Geosciences, Wuhan 430074, China

出　　处：《Frontiers of Earth Science》2015年第2期248-258,共11页地球科学前沿（英文版）

摘　　要：Organochlorine pesticides （OCPs） found in rivers from the Sichuan Basin to Aba Prefectttre profile were analyzed to assess possible health risks to adults and children who use the river as a source of drinking water. OCP concentrations in surface water ranged between 22.29-274.28 ng·L^-1. Compared with other published data around the world, OCP levels in this study were moderate. Among all OCPs, hexachlorobenzene （HCB） and hexa- chlorocyclohexanes （HCHs） were the predominant com- pounds. Higher concentrations of OCPs were attributed close to the agricultural fields of the Sichuan Basin, current OCPs inputs, and long-range atmospheric transport from abroad. Various spatial patterns of OCPs in the profile might be affected by the usage and physicochemical properties of the pesticides, in addition to the adjacent geographical environment. The health risk assessment indicated that most OCPs had little impact on human health according to the acceptable risk level for carcino- gens （10^-6） recommended by the US EPA. However, carcinogenic effects caused by heptachlor, Aldrin, HCB, and a-HCH might occur in drinking water. The risk of negative impacts caused by OCPs is much higher for children than for adults.Organochlorine pesticides （OCPs） found in rivers from the Sichuan Basin to Aba Prefectttre profile were analyzed to assess possible health risks to adults and children who use the river as a source of drinking water. OCP concentrations in surface water ranged between 22.29-274.28 ng·L^-1. Compared with other published data around the world, OCP levels in this study were moderate. Among all OCPs, hexachlorobenzene （HCB） and hexa- chlorocyclohexanes （HCHs） were the predominant com- pounds. Higher concentrations of OCPs were attributed close to the agricultural fields of the Sichuan Basin, current OCPs inputs, and long-range atmospheric transport from abroad. Various spatial patterns of OCPs in the profile might be affected by the usage and physicochemical properties of the pesticides, in addition to the adjacent geographical environment. The health risk assessment indicated that most OCPs had little impact on human health according to the acceptable risk level for carcino- gens （10^-6） recommended by the US EPA. However, carcinogenic effects caused by heptachlor, Aldrin, HCB, and a-HCH might occur in drinking water. The risk of negative impacts caused by OCPs is much higher for children than for adults.

关 键 词：organochlorine pesticides （OCPs） surfacewater spatial distribution health risk assessment TIBETANPLATEAU 

分 类 号：X832[环境科学与工程—环境工程] TS272[农业科学—茶叶生产加工]