太湖沉积物柱状样中有机氯农药的垂直分布特征  

Vertical distribution characteristics of organochlorine pesticides in sediment core of Taihu Lake

作　　者：亓学奎[1,2] 马召辉[2] 王英[2] 姜霞[3] 金军[2,4] 汪雨[1] 

机构地区：[1]北京市理化分析测试中心,北京100089 [2]中央民族大学生命与环境科学学院,北京100081 [3]中国环境科学研究院,北京100012 [4]北京市食品环境与健康工程技术研究中心,北京100081

出　　处：《环境化学》2015年第5期918-924,共7页Environmental Chemistry

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101-010-04-1);中央民族大学一流大学一流学科建设项目(YLDX01013);北京市科技计划课题(Z131110000613072)资助

摘　　要：采用气相色谱质谱法测定了太湖沉积物柱状样品中有机氯农药(OCPs)含量,探讨了沉积柱中有机氯农药的垂直变化特征及可能的来源.研究结果表明:沉积柱中OCPs浓度为0.88—4.73 ng·g-1(干重),平均值为2.17 ng·g-1;DDTs、HCHs、六氯苯的残留量均较高,其中DDTs为0.10—1.32 ng·g-1,平均值为0.57 ng·g-1;HCHs的浓度为0.25—1.99 ng·g-1,平均值为0.65 ng·g-1;六氯苯为0.50—1.35 ng·g-1,平均值为0.92 ng·g-1.3个湖湾的沉积柱表层DDTs含量最高,有明显的表面富集现象,成分分析表明,太湖可能着存在着DDTs类物质的输入.The concentrations of organochlorine pesticides （ OCPs） in sediment cores of Taihu Lake were determined by GC-MS, and the vertical distribution and potential sources of OCPs were investigated. The results indicated that the total OCPs concentrations in sediment cores ranging from 0.88 to 4.73 ng·g^-1（ dry weight, dw） , and the average content was 2.17 ng·g^-1 . Hexachlorobenzene （ HCB） , DDTs and HCHs had higher concentrations than others. The concentration ranges of DDTs, HCHs and hexachlorobenzene （HCB） were 0.10—1.32 ng·g^-1, 0.25—1.99 ng·g^-1 and 0.50—1.35 ng·g^-1 , with the mean concentrations of 0. 92 ng·g^-1 , 0. 57 ng·g^-1 and 0. 65 ng·g^-1 respectively. The contents of DDTs in surface sediment cores from three bays were highest, and have an apparent surface enrichment. The composition analysis results suggest that there might be new input of DDTs in recent years.

关 键 词：太湖 沉积物柱样 有机氯农药 垂直分布 

分 类 号：X592[环境科学与工程—环境工程]