Evaluation method and system for heavy metal content characteristics and potential risks of soil

Abstract

The invention belongs to the technical field of evaluation of heavy metal content of soil in a mining area and discloses an evaluation method and system for heavy metal content characteristics and potential risks of the soil. The potential risks of the soil in the Ili mining area are analyzed through collecting a soil sample and chemically determining the heavy metal content of the soil by adopting a single factor index method, a Nemerow comprehensive pollution index method and a geoaccumulation index method. According to the evaluation method and system, disclosed by the invention, six heavymetal pollution degrees of the soil are as follows in sequence: the pollution degree of Dadamutu coal mine is Cd>Pd>Zn>Cr>Cu>Ni; the pollution degree of Chinghua coal mine is Cd>Pd>Zn>Cu>Cr>Ni; the pollution degree of Tichanggou coal mine is Cd>Pd>Zn>Cu>Cr>Ni; the heavy metal accumulation condition in the soil of the three mining areas is the Tichanggou coal mine>the Chinghua coal mine>the Dadamutu coal mine. The evaluation method and system, disclosed by the invention can provide theoretical basis for post-period pollution management of heavy metal pollution of the soil in the Ili mining area, repairing of heavy metal polluted soil in the Ili mining area and ecological environment protection work of Ili.

Description

technical field [0001] The invention belongs to the technical field of soil heavy metal content evaluation in mining areas, and in particular relates to a soil heavy metal content characteristic and a potential risk evaluation method and system. Background technique [0002] Coal is one of the important energy sources in our country. Of course, this is inseparable from my country's rich coal reserves and coal production. Coal mining can bring us great economic benefits. However, large-scale unreasonable coal mining will pollute water resources, the surrounding atmosphere, and cause serious pollution to the soil around the mining area. Firstly, the large-scale unreasonable mining of coal will directly lead to land subsidence, which not only affects the topography, but also leads to the loss of soil nutrients; secondly, a large amount of waste coal gangue will be generated during the coal washing process, occupying a large area of ​​land Stacking, the stacking process will ...

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Problems solved by technology

[0005] To sum up, the problems existing in the existing technology are: at present, there are few analyzes on the change of heavy metal content in the mining area soil and the analysis of the pollution risk assessment in the mining area, and there are few analyzes on the heavy metal content and pollution risk assessment in the Yili mining area.

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