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Author(s): |
Bei Zhang, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
Yong Yang, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China
Weidong Li, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China ;Key Laboratory of Subtropical Agricultural Resources and Environment of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan, China
Shanqin Wang, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China ;Key Laboratory of Subtropical Agricultural Resources and Environment of the Ministry of Agriculture, Huazhong Agricultural University, Wuhan, China
Mingkai Qu, College of Resources and Environment, Huazhong Agricultural University, Wuhan, China |
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Abstract: |
83 samples of top-soils (0-20cm) were collected from an area in the urban-rural transition zone of Wuhan and the contents of Cd, Cu, Ni, Pb and Zn in soils were analyzed. Statistical results show that the average concentration of Cd exceeds national soil quality standard; Cu and Ni are more than national standard in a small part of the region, and Zn content is more than the standard in only a few locations. Pb content is completely under the national standard. Geostatistical and multivariate statistical analyses were conducted to indicate the sources of pollution. It is found that: the pollution of Cd and Ni is mainly caused by anthropogenic factors because it occurs mainly in densely populated areas where traffic is heavy; Cu and Zn are related to both anthropogenic factors and parent material; and the Pb content is mainly related to parent material. In this area the serious pollution is caused by Cd from manufacturers. Therefore, some effective measures should be adopted to reduce emissions so as to further control the pollution.
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