贵阳市饮用水源地有机氯农药污染的检测与特征分析  

Detection and Feature Analysis of Organochlorine Pesticide Pollution in Drinking Water Sources in Guiyang

作　　者：魏琛[1] 宋丽婧 杨卫萍[1] 陆天友[1] 王萍[1] 姚新梅[1] 

机构地区：[1]贵州大学土木学院,贵州贵阳550025

出　　处：《环境科学与技术》2016年第3期131-135,共5页Environmental Science & Technology

基　　金：贵州省科技计划课题:贵州省城市典型饮用水源地面源污染及自动监测设施智能运维系统研究与示范(黔科合SY字〔2014〕3045号);贵州大学研究生创新基金项目:贵州典型饮用水源地农药面源污染迁移途径与水质响应研究(研理工2014063)

摘　　要：集中式饮用水源中有机氯污染物研究对开展水源地环境保护具有重要的意义。采用气相色谱/质普联用技术（GC/MS）,同时检测贵阳市4个主要集中式饮用水源地的11个水样中13种有机氯农药残留情况,并分析了污染物分布特征。研究表明,该方法除百菌清回收率偏低,〈60%以外,其他物质回收率在70.78%-100.62%,相对标准偏差（RSD）为0.8%-13.4%,在0.05-2μg/m L（n=6）低浓度范围内,各物质标准曲线线性相关系数（r）在0.995 6-0.999 6之间,线性良好,灵敏度高、分析速度快适用于微污染源水的检测。检测结果显示,有10个水样中能检出有机氯农药,红枫湖有机氯污染情况较阿哈水库和百花湖的要严重,松柏山水库有机氯污染未能检出。水样中以HCHs、甲氰菊酯农药为主,检出率达到64.4%,HCHs最高浓度达到5.37μg/L,甲氰菊酯最高浓度达到0.047μg/L;百菌清、三唑酮检出率为到27.3%,百菌清最高浓度达到14.097μg/L,三唑酮最高浓度达到2.836μg/L。Research of organochlorine pollutant in the centralized drinking water sources is of great significance for environmental protection in water sources. The residue of 13 organochlorine pesticides in 11 water samples in four main centralized drinking water sources in Guiyang is detected by GC/MS technology and the pollutant distribution characteristics are analyzed. Studies show that the chlorothalonil recovery rate in this method is less than 60% and the recovery rate of other substances is between 70.78% and 100.62%, with the relative standard deviation（RSD） of 0.8% -13.4% and within the low concentration range of 0.05-2 μg/m L（n=6）. The linear correlation coefficient（r） of the standard curve of each substance is between 0.995 6 and 0.999 6. With good linearity, high sensitivity and fast analysis speed, this method is suitable for detection of micro-polluted source water. Detection results show that the organochlorine pesticide can be detected in 10 water samples, the organochlorine pollution in the Red Maple Lake is more serious than that in Aha Lake and Baihua Lake and the organochlorine pollution in Songbaishan Reservoir cannot be detected. The detection rate of the main HCHs and fenpropathrin pesticide in the water sample is 64.4%, with the highest concentration of HCHs as 5.37 μg/L and fenpropathrin as 0.047 μg/L.The detection rate of chlorothalonil and triadimefon is 27.3%, with the highest concentration of chlorothalonil as 14.097 μg/L and triadimefon as 2.836 μg/L, which would provide scientific reference for the research on persistent pollutants in other water sources in Guizhou Province.

关 键 词：集中式饮用水源地 气相色谱/质谱联用 有机氯农药 残留特征 

分 类 号：X132[环境科学与工程—环境科学]