Mining soil remediation method

Abstract

The invention discloses a mining soil remediation method. The method comprises the following steps that the contaminated soil in a mining area is excavated with excavating equipment and is subjected to preliminary filtration; a soil sterilant is added into the soil, the soil and the soil sterilant are stirred, and secondary filtration is conducted during stirring; straw manure and grass ash are applied to each mu of the contaminated soil surface, 5kg of a remediation agent is added to 100 times the mass of water to be sprayed to the soil surface; the soil is deeply ploughed, soil remediation agent to the soil surface; plants with enrichment capacity of heavy metal are planted in the soil, when the plants grow to the growth stage, a plant growth inhibitor is sprayed to the plants; when theplants grow to the maturity stage, a heavy metal pollution remediation promoter is sprayed; and harvesting is conducted during senescence of the plants to remove heavy metal contamination. The restoration method can effectively remediate the soil contaminated by keratinization, and is feasible for residential land and planting land.

Description

technical field [0001] The invention relates to the technical field of ecological pollution control, in particular to a method for repairing soil in mining areas. Background technique [0002] In recent decades, due to global industrialization, a large number of potentially toxic substances have been discharged into the biosphere, including heavy metals, which can enter soil, rivers, and groundwater through various channels. Heavy metals are pollutants that are difficult to control. They have a long incubation period, chronic accumulation of hazards, are not easy to be noticed by people, and are non-degradable. Once they enter the environment, they will produce persistent and series of pollution, which is not easy to be removed. Tailings ponds in metal mines are an important source of heavy metal pollution in the environmental system. Tailings are a kind of solid waste generated during the mining process. These wastes contain high concentrations of toxic heavy metals. When t...

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Problems solved by technology

[0003] However, there are still few effective cases of bioremediation of heavy metal-contaminated soil in mining areas at home and abroad, especially in the study of soil treatment, plant species selection and phytoremediation mechanism.