生态环境学报Issue(12)：1958-1963,6.
有机氯农药在太湖水体-沉积物中的交换特征
Water-to-Sediment Exchange of Organochlorine Pesticides in Taihu Lake
摘要
Abstract
Organochlorine pesticides (OCPs) are important persistent organic pollutants (POPs), Because of their half-volatility, persistence, and high toxicity in the environment and biological accumulation through the food web, OCPs have done great harm to the environment and human health. OCPs are able to migrate between the different environmental media, proceed to long-range transport in the air, and lead to global environmental problems. High level of OCPs in the Taihu Lake Region was reported by the latest research. In order to understand the sources and the environmental behaviors of these OCPs in the Taihu Lake, the contents of OCPs in both water and sediment samples from Zhushan Bay of Taihu Lake were determined by GC-MS. The potential sources and water-sediment exchange flux of OCPs was discussed. The results indicated that HCB were the most dominant compounds in the sediment, and the content was 2.33 ng·g-1 (DW). Relative higher contents of OCPs werep,p’-DDT,p,p’-DDE andβ-HCH, the contents were 0.67 ng·g-1, 0.64 ng·g-1 and 0.37 ng·g-1, respectively. It can be seen from the OCPs in Taihu Lake water samples, the highest content ofp,p’-DDT was 426.26 pg·L-1, followed byα-HCH and endosulfan which contents were 289.99 pg·L-1 and 215.20 pg·L-1. According to ratio ofα-HCH/γ-HCH and HCHs source analysis, it can be found that HCHs pollution in Taihu Lake came from the use of industrial HCHs and lindane. The net exchange flux of HCHs were release fluxes, indicating the tendency to transfer these contaminants from sediment to water. This implies that the residue of HCHs in the lake sediment might have been an important source of HCHs to the water. The ratio ofp,p’-DDT/p,p’-DDE in water bodies is much larger than 1, and the net exchange flux of p,p’-DDT were deposition fluxes, indicating the new sources of input. It is notable that the fluxes for endosulfan I also followed the same pattern asp,p’-DDT, reflecting there were probably new sources to the Taihu Lake.关键词
太湖/水体/沉积物/交换通量/有机氯农药Key words
Taihu Lake/water/sediment/exchange flux/organochlorine pesticides分类
资源环境引用本文复制引用
亓学奎,马召辉,王英,姜霞,金军,汪雨..有机氯农药在太湖水体-沉积物中的交换特征[J].生态环境学报,2014,(12):1958-1963,6.基金项目
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 （）
