HUANG Dawei1,3,GUI Herong2,3
(1.School of Earth and Environment, Anhui University of Science and Technology, Huainan 232001, China;
2.School of Resources and Civil Engineering, Suzhou University, Suzhou 234000, China;
3.National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou 234000, China)
Abstract: To study soil heavy metal content characteristics in Sunan mining area of Huaibei coalfield, China contents of Fe, Mn, Cd, Cr, Pb, Ni, Zn and Cu in surface soil samples were analyzed. Geoaccumulation index and potential ecological risk index method were used to evaluate soil pollution degree respectively, and multivariate statistical analysis was applied to examine the sources of soil heavy metals. Results show that the mean contents of Cd, Cr, Pb, Ni, Zn and Cu are not exceeding the national secondary standard of environment quality for soil at all. Comprehensive evaluation results indicate that Cd pollution accumulation is obvious, and Cd is the main ecological risk factor. Cluster analysis sorts heavy metals into Group I (Fe, Ni and Pb), Group II (Mn, Cu and Cd) and Group III (Zn and Cr), and elements in each group are extreme similar in geochemical process. Principal component analysis identifies 3 principal components (PC1, PC2 and PC3) from the heavy metals, PC1 (Mn, Cu and Cd) is representative of mining and road dust pollution , PC2 (Fe, Ni and Pb) is representing soil parent materials and tail gas emissions, and PC3 (Zn and Cr) belongs to transportation and agricultural production pollution.
Keywords: Sunan mining area; soil heavy metal; content characteristics; evaluation; source
EARTH AND ENVIRONMENT Vol.45, No.5, Tot No.319, 2017, Page 546-554
