financially supported by the National Natural Science Foundation of China(Grant No.41172331);the Academician Foundation of Chongqing(CSTC,2010BC7004);Geological survey project of Ministry of Land and Resources of China(1212011087119)
Abstract Karst areas have much higher ecological vulnerability and are easy to be contaminated by polychlorinated biphenyls(PCBs) which are introduced as health risk pollutants.PCBs concentrations were used to underst...