Method of comprehensive assessment for heavy metal pollution of metal slag and soil

Abstract

The invention discloses a method of comprehensive assessment for heavy metal pollution of metal slag and soil. The method includes: establishing a fuzzy comprehensive assessment factor set: U= {u1, u2..., um}, with ui being a pollution factor of an assessment object; establishing an assessment set: V= {v1, v2..., vn}, with vj being an assessment level of the pollution factor ui; establishing a weight set: A= {a1, a2..., am} according to pollution levels of the pollution factors, with a weight ai indicating the weight of the pollution factor ui; determining a degree of membership of each pollution factor to the assessment level so as to obtain a corresponding fuzzy relation matrix R; subjecting the weight set A and the relation matrix R to compound operation to obtain a fuzzy comprehensive assessment vector B; normalizing the fuzzy comprehensive assessment vector B, and using a maximum level as an environment quality assessment level according to the principle of maximum membership degree in fuzzy mathematics. The method has the advantage that comprehensive pollution of heavy metals in slag and soil in mining areas is assessed more accurately, reasonably and objectively.

Description

technical field [0001] The invention relates to the technical field of comprehensive evaluation of environmental pollution, in particular to a comprehensive evaluation method for heavy metal pollution in metal slag soil. Background technique [0002] As a kind of persistent and potentially toxic pollutants, heavy metals can exist in the environment for a long time and accumulate continuously because they cannot be biodegraded once they enter the environment, seriously endangering human and ecological safety. The long-term mining of mines and the random stacking of slag will cause serious heavy metal pollution in the local environment. The long-term mixed stacking of slag and soil will become a new pollution source and cause the threat of heavy metal pollution, making heavy metal poisoning a common problem in mining areas, which not only affects the development of the mine itself , and affect the people's life and agricultural production in the surrounding areas of the mine. ...

AI Technical Summary

Problems solved by technology

[0004] The current heavy metal pollution evaluation method generally adopts the weighting method of pollutant concentration exceeding the standard. However, due to the large difference in the physiological toxicity of different heavy metals, their toxicity levels to individuals are different, and the weighting method of pollutant concentration exceeding the standard underestimates some low concentrations. Toxic effects of toxic components, thus affecting the accuracy of final evaluation results

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