Zhu Xiao-long1.2 Wei Xiao-fang1.2 Chen Qi-si2 Gao Xian-ping2 Ma Ning1.2 Lu Zai-liang2
(1. Appraisal Center for Environment and Engineering of ChongQing, Chongqing 401121, China;
2. Management and Service Center for Solid Wastes of ChongQing, Chongqing 401121, China)
Abstract: Soil samples were collected from a typical pesticide contaminated site in Southwest, China, and the hexachlorocyclohexanes (HCHs) and dichlorodiphenyltrichloroethanes (DDTs) were analyzed with GC-MS to understand the residual level and vertical distribution characteristics in soil. The results show that the residual concentrations of HCHs and DDTs in soils were nd～90.8 mg/kg (with a mean of 3.65 mg/kg) and nd～465 mg/kg (with an average of 11.22 mg/kg), respectively. The vertical characteristics of DDTs and HCHs in the soil profile indicated the detected rate was universally high and the deepest soil layer polluted by contaminants was up to 1100 cm. Although the vertical variations of DDTs and HCHs among different soil sample site were obviously different, it all shows the great capability of vertical migration possibly owing to the reconstruction of workplace area during the production. Overall, these results indicated that the industrial site was seriously contaminated by DDTs and HCHs, it is necessary to investigate and assess in detail, and then remedy for environmental safety in reutilization.
Key words: pesticide industrial site; HCHs; DDTs; residual level; vertical distribution
EARTH AND ENVIRONMENT Vol. 42, No.4, Tot No.300, 2014, Page489-495
