Microbial remediation method for tailing pond heavy metal pollution

Abstract

The invention provides a method for tailing pond microbial remediation with multiple sulfate-reducing bacteria EM2, SRB-4 and iron ion reducing bacteria Biometek-A. The above bacteria are introduced into tailings and nutrients needed by microbial growth are added to construct a set of tailing pond microbial remediation system. Some nutrients added into the tailings and growth of the reducing bacteria can inhibit the growth of inherent oxidizing bacteria in tailings and obviously inhibit the oxidation and dissolution of multiple heavy metal ions, thus improving the pH of tailings, lowering theredox potential, and at the same time greatly reducing the permeability of tailings. Therefore, the remediation method can reach a remediation effect on the tailing pond.

Description

technical field [0001] The invention belongs to the field of bioremediation, and in particular relates to a microbial remediation method for heavy metal pollution in tailing ponds by applying a variety of sulfate-reducing bacteria and iron ion-reducing bacteria to tailings heavy metal pollution. Background technique [0002] At present, the remediation methods of heavy metal pollution in tailings ponds are mainly divided into three categories: physical methods, chemical methods and biological methods. Due to the small area of ​​heavy metal pollution in foreign countries, the combination of chemical and physical treatment is mainly adopted after ectopic chemical solidification and then landfill. This restoration method is very costly. At present, the in-situ chemical solidification technology is mainly used in China. The biggest problem is that the cost is too high, the soil properties are easily changed, and the plant production is reduced. It should also be emphasized that...

AI Technical Summary

Problems solved by technology

Due to the small area of ​​heavy metal pollution in foreign countries, the combination of chemical and physical treatment is mainly adopted after ectopic chemical solidification and then landfill. This repair method is very expensive.

At present, the in-situ chemical solidification technology is mainly used in China. The biggest problem is that the cost is too high, the soil properties are easily changed, and the plant production is reduced.

It should also be emphasized that the above methods are only for sites that have been polluted by heavy metals (no new sources of heavy metal pollution), and it is difficult to apply to the pollution sites where heavy metals are continuously leached out (non-ferrous metal mine tailings)

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