Microbial in-situ remediation method of heavy metal contaminated soil

Abstract

The invention relates to a microbial in-situ remediation method of heavy metal contaminated soil. The method comprises the following steps: (1) flora culture; (2) flora activation; (3) microbial growth agent preparation; (4) nutrient solution preparation; (5) primary pouring; and (6) remediation. According to the microbial in-situ remediation method of heavy metal contaminated soil, heavy metal microbial degradation floras and a microbial growth accelerator serve as the main ingredients, certain microbial nutrients are replenished and the microbial growth accelerator is added to promote high speed reproduction of heavy metal microbial transformation floras while preferably putting the heavy metal microbial transformation floras in the soil, thus greatly improving the transformation and degradation efficiency of the heavy metal elements in the soil, solving the problems of long time and slowness in effect taking in a microbial in-situ remediation method of heavy metal contaminated soil and enabling the microbial in-situ remediation technology to become the reliable, efficient and operable heavy metal contaminated soil control means.

Description

technical field [0001] The invention belongs to the field of contaminated soil treatment and relates to microbial in-situ remediation, in particular to a microbial in-situ remediation method for heavy metal polluted soil. Background technique [0002] Soil pollution is caused by human activities that cause the content of certain harmful components to be significantly higher than the original content of the soil and exceed the self-purification capacity of the soil, which causes changes in the composition, structure and function of the soil, and harmful substances or their decomposition products are released in the soil. Gradually accumulate and reach the level of endangering human health. Among them, soil heavy metal pollution is one of the most prominent soil pollution problems, which mainly come from sewage irrigation, industrial waste residue, urban garbage, industrial waste stacking and atmospheric deposition. Soil heavy metal pollution mainly includes mercury (Hg), cad...

AI Technical Summary

Problems solved by technology

However, the existing microbial remediation technology for heavy metal-contaminated soil has certain limitations, such as long duration of microbial remediation, slow effect, great impact on the environment, and not suitable for remediation of severely polluted soil, etc.

[0005] Studies have shown that a common factor limiting the process of microbial in situ remediation of heavy metal-contaminated sites is that contaminated sites usually lack sufficient nutrients for the growth of foreign or indigenous microorganisms, so that the potential of these microorganisms to control heavy metals cannot be fully utilized. It has become an ideal measure for soil heavy metal pollution control