Ion mineralization stabilizer for treating soil with heavy metal pollution and application method thereof

Abstract

The invention discloses ion mineralization stabilizer for treating soil with heavy metal pollution and an application method thereof. The ion mineralization stabilizer comprises, by weight percent, 5-30% of sulfur-based compound, 10-50% of phosphor-based compound, 10-50% of calcium-based compound, and 10-30% of silicon-based compound. The materials are respectively ground into powders with particle size not less than 200 meshes, and the powders are proportionally mixed well. The application method of the ion mineralization stabilizer for treating soil with heavy metal pollution includes: detecting arsenic content and leaching toxicity of the soil to be treated, placing the ion mineralization stabilizers in different proportions on the surface of the soil to be treated according to pollution level, well mixing to form mixed soil by ploughing and stirring, adding water to keep the water content of the mixed soil no less than 25%, covering the mixed soil with moisturizing material, curing for at least 5 days to keep heavy metals in the mixed soil to form stable minerals.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to an ion mineralization stabilizer for treating heavy metal-polluted soil and a use method thereof. Background technique [0002] Heavy metal pollution refers to environmental pollution caused by heavy metals or their compounds, mainly caused by human factors such as mining, waste gas discharge, sewage irrigation and the use of heavy metal products. Soil heavy metal pollution has the characteristics of concealment, long-term and irreversibility. The accumulation of harmful heavy metals in the soil to a certain extent will not only lead to soil degradation, decrease in crop yield and quality, but also pollute surface water and groundwater through runoff and leaching. , worsen the hydrological environment, and may directly poison plants or endanger human health through the food chain. At the beginning of April 2011, my country's first "12th Five-Year" special plan -...

AI Technical Summary

Problems solved by technology

Engineering restoration is a relatively classic soil heavy metal pollution control measure. It has the advantages of thoroughness and stability. Its disadvantages are: large amount of engineering and high investment costs. Improper measures will destroy the soil structure and lead to a decline in soil fertility.

However, there are disadvantages in this method: high repair costs, high energy consumption, and even secondary pollution

The disadvantages of this method: the treatment period is long, the later plant collection and treatment process is relatively complicated, and the maintenance management period is long

[0008] At present, our country is still in its infancy in the stabilization and restoration technology of heavy metal contaminated soil. Lime, phosphate, cement, etc. are mainly used to passivate heavy metal ions in the form of hydroxide or phosphate, which has poor long-term effect, large amount of medicament, and only It is suitable for the shortcomings of low-pollution soil, while the soil pollution in my country, especially the heavy metal-polluted soil around mining areas and smelters, has the characteristics of complex and high content