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

A metal slag and comprehensive evaluation technology, applied in the field of comprehensive environmental pollution evaluation, can solve the problems of different levels of toxicity, affecting the accuracy of evaluation results, and underestimating toxic effects

Inactive Publication Date: 2015-01-21
CHINA UNIV OF MINING & TECH (BEIJING)
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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 to

Method used

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

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Embodiment

[0034] figure 1 It is a flowchart of a comprehensive evaluation method for metal slag heavy metal pollution provided by the embodiment of the present invention. As shown in the figure, the method mainly includes the following steps:

[0035] Step 11, establish fuzzy comprehensive evaluation factor set U={u 1 , u 2 ,...u m}, and evaluation set V={v 1 ,v 2 ,...v n}.

[0036] Among them, u i is any element in the set U, representing the pollution factor of the evaluation object; v j is any element in the set V, representing the pollution factor u i The evaluation level of ; among them, 1≤i≤m, 1≤j≤n.

[0037] Exemplarily, the set U=(copper, lead, chromium...), the elements in the set U can be determined according to the heavy metal elements contained in the evaluation object; the set V is a set of n evaluation levels, such as V=(clean, still clean, lightly polluted, moderately polluted and heavily polluted) and V=(I, II, III, IV, V) in the water body.

[0038] Step 12....

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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. ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 何绪文房增强程言君王春荣贾建丽王建兵刘永兵于妍
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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