Ecological remediation method for mining soil

Abstract

The invention discloses an ecological remediation method for mining soil. The ecological remediation method comprises the following steps that the mining soil to be remediated is ploughed till the ploughing depth reaches 15-25 cm, crushed till the particle size reaches 1-3 cm, and air-dried for 3-5 days, and the step is repeated for three to four times; with attapulgite, bagasse, quick lime and straw as base materials, an ecological remediation agent with the water content being 35%-45% is prepared by adding bacillus subtilis, sodium humate and hydroxyl butyl cellulose to be mixed with water evenly; the prepared ecological remediation agent is evenly scattered onto the ploughed and crushed mining soil, and the mining soil is ploughed again; and the ploughed mining soil is covered with the ecological remediation agent again with the covering height being 0.3-0.8 cm, and standing is conducted for 25-35 days. The ecological remediation method is simple, the remediation materials are easy to prepared, the production cost is reduced, and pollution to people, livestock and the ambient environment is avoided; and various absorption materials are adopted so that heavy metal element in the mining soil can be absorbed, and the soil environment is improved.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration and relates to a mine soil ecological restoration method. Background technique [0002] With the rapid development of my country's mining industry, a large amount of tailings waste has been produced. The treatment and disposal of these waste residues are generally stored in the form of tailings ponds, which not only occupy a large amount of land, but also pollute soil, groundwater and surface water through acidification and rainfall leaching. [0003] For the heavy metal-contaminated soil, heavy metal-containing waste residues and wastes in mining areas and surrounding areas, the commonly used harmless technology is solidification. Solidification is to add additives to change the physical and chemical properties of the soil, and to change its concentration in the soil through the adsorption or co-precipitation of heavy metals. Reduce the leaching toxicity, bioavailability and disso...

AI Technical Summary

Problems solved by technology

First of all, due to the limitation of the water and fertilizer retention performance of the soil matrix on the surface of the mine soil, under the environmental conditions of drought or heavy rainfall, the water and nutrients of the soil are easy to lose, resulting in the growth of vegetation being inhibited or even dead

Secondly, due to the unreasonable vegetation types and their combinations, the survival rate of plants on the mine soil surface is low, and vegetation maintenance is difficult