Method for evaluating environmental pollution degree of uranium tailings percolation leaching

Abstract

The invention discloses a method for evaluating environmental pollution degree of uranium tailings percolation leaching, comprising the following steps: respectively placing uranium tailings samples into a 9K medium and an ABS + S medium, calculating pollution evaluation index values of different sampling points of uranium tailings and waste rock tailings to the surrounding soil environment by using measured average iron oxidation rate, hydrogen ion concentration and acid production concentration, and comparing the pollution evaluation index values with the judgment standard to obtain the pollution degree of a certain uranium tailings piled up for a long time to the surrounding soil environment.

Description

technical field [0001] The invention belongs to the field of environmental pollution evaluation of smelting tailings, in particular to an evaluation method for the degree of environmental pollution of uranium tailings percolation and leaching sites. Background technique [0002] With the continuous mining of uranium resources, the uranium tailings waste generated after leaching is stacked in the open air, and the uranium tailings waste is piled up for a long time to produce acidic wastewater after air oxidation, and continuously releases radium, radon and other radioactive substances, and the uranium in the tailings, etc. Under the acidic environment, coupled with the action of acidophilic microorganisms, metals will seep from insoluble substances into soluble and fluid substances into the ground surface, into groundwater and soil, and then cause damage to the soil ecological environment. Therefore, the pollution of uranium tailings to the surrounding farmland and other soil...

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Problems solved by technology

In the existing patents and documents, for example, patent CN106222239B provides a visual detection method for heavy metal uranium pollution, using Serratia marcescens and Cochlear rosea as heavy metal uranium sensitive bacteria and resistant bacteria, through Different colors can effectively realize visual detection. This method can only qualitatively judge whether the water body is polluted by heavy metal uranium, but cannot judge the degree of pollution.

Patent CN107058197A provides a microbial preparation for efficiently transforming heavy metal cadmium in polluted soil. Thiobacillus, Leptospira ferrooxidans, etc.) are enriched and cultivated to convert cadmium into a soluble state, and accelerate the dissolution of cadmium into the solution to achieve soil heavy metal remediation. It has not been used in the evaluation of environmental pollution.

Another example is the patent CN103838969A which provides a microbial index evaluation method for salinization-petroleum-heavy metal compound polluted soil quality. factors, as well as the weight of the three evaluation factors and the final evaluation method, but this method is not applicable to Acidimicrobium ferrooxidans, Leptospirilum ferriphilum, Thiobacillus thiooxidans ( Thiobacillus thiooxidans) Activity Judgment

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