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A preliminary study of OCPs in underground river surface sediments from Chongqing typical karst areas
Author(s): Yang Mei, Pu Junbing, Zhang Junpeng, Hu Zhiyong
Pages: 1340-
1344
Year: 2009
Issue:
7
Journal: Chinese Journal of Environmental Engineering
Keyword: 重庆; 地下河; 表层沉积物; OCPs;
Abstract: 利用GC-ECD对重庆典型岩溶区地下河表层沉积物中19种有机氯农药进行分析,结果表明,研究区总有机氯农药浓度为4.73~286.03 ng/g,DDTs浓度为0.35~181.78 ng/g,HCHs浓度为nd~23.53 ng/g.与国内外其他河流表层沉积物有机氯农药相比为高,说明重庆典型岩溶区地下河已处于较高污染状态.统计DDE/DDD发现,除姜家溶洞外,其他取样点DDE/DDD均大于1,表明研究区DDT降解主要在好氧环境中进行.除靛水地下河,其他取样点表层沉积物(DDD+DDE)/DDT均大于0.5,表明这些地区近年来没有新的DDT类农药输入.
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