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| Study on Heavy Metal Pollution in Topsoil of Gangue Field in Coal Mining Area |
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Received:May 24, 2023
Revised:June 01, 2023
Accepted:June 05, 2023
Published Online:September 04, 2023
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| DOI：doi：10.3969/j.issn.1007-7545.2023.10.020 |
| KeyWord:topsoil; heavy metal; pollution; gangue dump; Shenfu Dongsheng coalfield |
| Author | Institution |
| ZHANG Xiaomeng |
东华理工大学 水资源与环境工程学院 |
| GUO Qiaoling |
东华理工大学 水资源与环境工程学院 |
| YANG Yunsong |
南昌工学院 经济与管理学院;南昌工学院 经济与管理学院 |
| DAI Bing |
东华理工大学 水资源与环境工程学院 |
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| Abstract: |
| It is of great significance for environmental protection to treat coal gangue by landfilling and covering with soil, and to fill the subsidence area with gangue in layers to make the gully land flat. At present, most coal mines in Shenfu Dongsheng Coalfield have treated coal gangue by the way of landfilling. Applying a gangue dump in the Shenfu Dongsheng Coalfield as the research object to analyze the spatial distribution characteristics of As, Cd, Cr, Cu, Mn, Ni, Pb, and Zn contents in the surface soil (surface and -1 m away) of the waste dump, as well as the occurrence forms of heavy metals in the soil. The results show that the contents of As, Cd, Cr, Cu, Pb and Zn in gangue dumping field exceed the soil background value of this area, causing pollution to the local soil environment to some extent. The contents of As, Cd, Cr, Cu, Mn, Ni and Pb in the soil at -1 m are higher than that in the surface soil, and the contents of eight heavy metals in the soil at -1 m are higher than that in the control area. In gangue discharge field, the residuals of Cd, Cr, Cu and Ni account for the largest proportion; the oxidizable states of As account for the largest proportion; The exchangeable and reducible states of Mn, Zn and Pb account for a large proportion; Mn, Zn and Pb exist in more unstable forms, which have a great impact on the ecological environment. |
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