重庆典型岩溶区地下河水体有机氯农药污染初步研究

利用GC-ECD对重庆典型岩溶区地下河水体中有机氯农药(OCPs)进行检测，结果表明，地下河水中OCPs浓度为3.41～51.34ng/L，均值为13.23ng/L；滴滴涕(DDTs)浓度为0.07～2.37ng/L，均值为0.72ng/L；六六六(HCHs)浓度为1.16～39.82ng/L，均值为7.89ng/L。南川湾滩地下河水体有机氯农药污染最为严重，其上游纸厂排放废水是影响该地下河有机氯农药污染的主要原因。与国内外其它河流相比较，研究区地下河水体有机氯农药含量处于中低水平。由于岩溶区特殊的二元结构，地表水体一旦受到污染，将直接影响到地下水体。因此，对岩溶地下河进行有机污染物的调查研究具有重要的现实意义 

A preliminary study of OCPs in underground river water in Chongqing typical karst area

Organochlorine pesticides (OCPs) in underground river water in Chongqing typical karst area was analyzed by GC-ECD. The results show that concentration of OCPs ranges from 3.41 to 51.34 ng/L with an average of 13.23 ng/L;the concentration of DDTs ranges from 0.07 to 2.37 ng/L with an average of 0.72 ng/L;the concentration of HCHs ranges from 1.16 to 39.82 ng/L with an average of 7.89 ng/L. Wantan underground river is the most seriously polluted river in Nanchuan with the concentration of OCPs reaching 51.34 ng/L, which mainly resulted from the paper mills' waste water discharge. Comparing with other surface rivers in the world, the concentration of OCPs is in low level in the underground river. Due to the binary structure in karst area, once contaminated, it will have an impact on the underground river. Therefore, the investigation of underground river has important practical significance.