摘要
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。
19 kinds of organochlorine pesticides（OCPs） in surface sediments of Chongqing karst areas were analyzed by GC-ECD. The total concentration range of OCPs was 4.73 - 286.03 ng/g, the concentration range of DDTs was 0.35 - 181.78 ng/g and the concentration range of HCHs was nd -23.53 ng/g. Compared with other rivers,the organchlorine pesticides in sediments of Chongqing typical karst areas is in the high level. DDE/DDD demonstrates DDT degraded in the aerobic environment except Jiangjiarongdong. （ DDD ＋ DDE）/DDTs shows no new types of DDT input in recent years except Dianshui underground river.
出处
《环境工程学报》
CAS
CSCD
北大核心
2009年第7期1340-1344,共5页
Chinese Journal of Environmental Engineering
基金
重庆市科委院士专项基金资助项目(CSTC2007BC7001)
国家自然科学基金资助项目(40672165)
关键词
重庆
地下河
表层沉积物
OCPS
Chongqing
underground river
surface sediments
organochlorine pesticides
