Chemical speciation distribution characteristics and ecological risk assessment of heavy metals in soil from Sunan mining area,Anhui Province,China |
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| Authors: | Dawei Huang Manli Lin Weihua Peng |
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| Affiliation: | 1. School of Earth and Environment, Anhui University of Science and Technology, Huainan, China;2. National Engineering Research Center of Coal Mine Water Hazard Controlling, Suzhou, China;3. School of Resources and Civil Engineering, Suzhou University, Suzhou, China;4. School of Resources and Civil Engineering, Suzhou University, Suzhou, China;5. School of Space and Environment, Beihang University, Beijing, China |
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| Abstract: | In this study, the content characteristics, comprehensive pollution assessment, and morphological distribution characteristics of heavy metals (Mn, Cd, Cr, Pb, Ni, Zn, and Cu) were researched based on the processes of field investigation, sample collection, and experimental analysis. Results showed that the mean concentrations of Mn, Pb, Cr, Cu, Cd, Zn, and Ni in surface soils were 522.77, 22.56, 55.10, 25.41, 0.25, 57.02, and 48.47 mg kg?1, respectively. The surface soil from Sunan mining area was contaminated by Cu, Cd, and Ni in different degrees, and high CV values of Cd, Zn, Pb, and Ni were influenced by local human activities possibly. The evaluation results suggested that the mean Igeo values were in the sequence of Cd (0.657) > Ni (0.052) > Cu (?0.293) > Mn (?0.626) > Zn (?0.761) > Cr (?0.884) > Pb (?0.899). Besides, Cd was the most significant potential risk factor among all elements. Nevertheless, the Cd of bioavailable speciations with higher proportion had stronger migration and toxicity, and was more easier to be absorbed and enriched than other elements by some crops (e.g., vegetables, rice), and being at a relatively higher potential ecological risk in soil. |
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| Keywords: | chemical speciations ecological risk assessment heavy metals Sunan mining area |
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