Method for combined remediation of heavy metal in soil through biomass charcoal-plant-microorganism

Abstract

The invention discloses a method for three-phase combined remediation of heavy metal in soil through biomass charcoal-plant-microorganism. The method comprises the following steps: applying peanut shell biomass charcoal to soil, turning the soil, then spraying bacillus subtilis diluent to the soil, sowing paspalum notatum seeds after the soil is stable, and performing later maintenance on the paspalum natatum seeds. The method can effectively remove the heavy metal in the soil, selected materials are cheap, wide in source and easy to get, the method has the advantages of low cost, high efficiency and thorough in treatment, the removal rate of heavy metal copper can reach 85 percent, and the removal rate of heavy metal zinc can reach 83 percent.

Description

Technical field [0001] The invention relates to a method for using biomass charcoal-plants-microbes to repair heavy metals in soil, which can efficiently remove heavy metals in soil, and belongs to the field of resource utilization of agricultural solid waste. Background technique [0002] Soil is one of the essential elements for human survival and the guarantee for the survival of animals and plants. With the rapid economic development and the vigorous development of heavy industry, human activities have produced many pollutants, including heavy metals, and heavy metals entering the soil will cause heavy metals in the soil to exceed the standard. Heavy metals can neither be absorbed nor degraded in the soil, but can only remain in the soil, and continue to accumulate through the food chain, causing great harm to organisms. Therefore, the prevention and repair of heavy metal pollution in the soil is urgent. [0003] Using biomass charcoal-plants-microbes to repair heavy metals i...

AI Technical Summary

Problems solved by technology

[0004] One of the purposes of the present invention is to provide a method for efficiently remediating heavy metals in soil. This method is mainly aimed at the problem of low removal efficiency of heavy metals in soil. Remove part of the heavy metals in the soil, and biochar can also be used as energy to supply microorganisms and plants to grow in the soil, and plants and microorganisms supply and promote each other, and can also increase soil fertility; biochar, plants, microorganisms three Both phases can adsorb and decompose heavy metals in soil, which improves the removal efficiency of heavy metals in soil, and has a good prospect for remediation application.

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