西华段沙颍河和贾鲁河表层水体中有机氯农药研究

Studies on Organochlorine Pesticides(OCPs) in Surface Waters of Shaying River and Jialu River

采用固相萃取-气相色谱/质谱联用分析水体中有机氯农药的方法,分析了淮河(河南段)沙颍河和贾鲁河表层水体中有机氯农药的分布及组成特征。结果表明,研究区14个采样点中共检出包括六六六、滴滴涕、七氯、环氧七氯、反式九氯、艾氏剂、硫丹硫酸酯和甲氧滴滴涕在内的共13种有机氯农药,其总含量范围在97.41～496.16 ng/L,其中以六六六(HCHs)和滴滴涕(DDTs)为主,各类有机氯农药均未超出国家地表水环境质量标准。研究区的有机氯农药污染除主要源于历史上农田中有机氯农药的残留外,也有近期新农药污染源进入水环境的可能。

A method for analyzing the residual of organoehlorinated pesticides （OCPs） in waters by using solid phase extraction and gas chromatography-mass spectrometry was established to study the distribution and composition of OCPs in the surface water body of Shaying River and Jialu River. At the 14 sampling sites of study area, a total of 13 kinds of OCPs, including HCHs, DDTs, Heptaehlor, Heptaehlor epexide, trans-Nonachlor,Aldrin,Endosulfan sulfate and Methoxychlor were detected. Total amounts of OCPs in surface water were 97.41 -496.16 ng/L,and HCHs and DDTs were the main components. The concentrations of ＇all existences accorded with the target values of GB 3838-2002. Through analyzing the composition of OCPs,it was found that the origins of OCPs in study areas were historical residues and the recent discharge of pesticides.