Method for remediating heavy metal polluted soil by comprehensively utilizing biochemical resources

Abstract

The invention discloses a method for remediating heavy metal polluted soil by comprehensively utilizing biochemical resources. The method comprises the following three steps: spraying a pesticide, enriching earthworms for remediation and performing microbial decomposition, wherein the pesticide in the pesticide spraying process is prepared from the following materials in parts by mass: 280-320 parts of organic fertilizer, 28-32 parts of a microbial agent, 0.05-0.1 part of pyrethrum, 0.03-0.09 part of derris and 0.02-0.06 part of bacillus thuringiensis powder. According to the method, the soil fertility can be improved, pests in the soil and on the surface can be killed, the microbial decomposition process is added, the effect is remarkable, and the operation is easy.

Description

technical field

[0001] The invention discloses a soil remediation method, in particular to a method for comprehensively utilizing biochemical resources to repair heavy metal-contaminated soil, and belongs to the field of soil remediation methods. Background technique

[0002] Soil heavy metal pollution refers to the phenomenon that due to the addition of metals to the soil due to human activities, the heavy metals in the soil are significantly higher than the original content, and the quality of the ecological environment is deteriorated. Heavy metals in polluted soil mainly include mercury (Hg), cadmium (Cd), lead (Pb), chromium (Cr) and metalloid arsenic (As) and other elements with significant biological toxicity, as well as zinc (Zn) and copper with certain toxicity. (Cu), nickel (Ni) and other elements. Mainly come from pesticides, wastewater, sludge and atmospheric deposition, etc. For example, mercury mainly comes from mercury-containing wastewater, cadmium and lead ...

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