Remediation method for improving remediation effect of heavy metal contaminated soil

Abstract

The invention discloses a remediation method for improving the remediation effect of heavy metal contaminated soil. The method comprises the following steps: (1), stripping soil with the thickness of10-50cm from the surface layer of heavy metal contaminated soil, stacking the soil into a remediation pool, and inoculating magnetotactic bacteria; (2), after culturing for 15-25 days, enabling the soil in the remediation pool to be completely soaked in water, setting a magnetic field, and keeping the state for 20-25 days; (3), draining water in the remediation pool, and then leaching the soil inthe pool with clear water; (4), spraying liquid humic acid into the soil in the remediation pool; (5), adding molasses into the heavy metal contaminated soil with the surface soil stripped, spraying liquid humic acid after ploughing and standing, backfilling the soil in the (4), and planting plants capable of enriching heavy metal; and (6), regularly harvesting, removing and reseeding the plants capable of enriching the heavy metals in the (5), and regularly detecting the content of each heavy metal in the heavy metal contaminated soil until the content of the heavy metals in the heavy metal contaminated soil reaches the safety standard.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a restoration method for improving the restoration effect of heavy metal-contaminated soil. Background technique [0002] With the advancement of industrialization, the environmental problems generated in the process of economic development have gradually attracted people's attention. In recent years, the heavy metal pollution of the atmosphere, water and soil environment and its treatment and restoration have gradually become the focus of people's attention. Among them, due to the complex composition of pollutants in the soil, the difficulty of treatment, and the high cost, the treatment and restoration of heavy metal pollution in soil is currently a hot and difficult point in the research of heavy metal pollution restoration. [0003] Soil heavy metal pollution refers to the phenomenon that the accumulation of heavy metals in the soil due to natural activities ...

AI Technical Summary

Problems solved by technology

Due to the convenient operation and quick effect, it plays an irreplaceable role in the process of polluted soil treatment; at present, the main curing agents are cement, lime, fly ash, etc., and their application range is narrow, the cost is high, and some curing agents themselves There are secondary pollution, such as fly ash, the long-term curing effect of the curing agent is unstable, etc.

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