| This study collected 42 soil samples from the surrounding area of Xiaoshifang lead-zinc mine in Huili County of Sichuan. Contents of 5 kinds of heavy metal Pb, Cd, Hg, As and Cr in these samples were measured and the pollution level of the soil was assessed, as well as the ecological and health risks were evaluated. Results showed that contents of Pb and Cd were higher than the restriction in Environmental quality standard for soils GB15618-1995, with an over-limit ratio of 9.5%. By the Nemerow multi-factor index, the soil around the mine was under mild contamination. By the view of ecological risk, the soil was in low risk and we suggested Cd, Hg and Pb considered as the primary controlling elements. The total non-cancerogenic risk was smaller than 1, meaning noncancerogenic risk in safe range. The total cancerogenic risk of carcinogenic metals Cd, As and Cr was less than 10-6, indicating the cancerogenic risk was low and would not impact human health. |
