Acid heavy metal contaminated soil leaching remediation method

Abstract

The invention relates to an acid heavy metal contaminated soil leaching remediation method. The method comprises the steps of sampling classification, leaching treatment, passivation maintenance, deodorization treatment and the like. According to the method, the contaminated components of the soil are analyzed, and the soil is classified, so that different treatment modes are adopted, heavy metalsubstances in the heavily contaminated soil need to be leached firstly, and after the content of the heavy metal substances is reduced, a remediation material is added into the soil for passivation and maintenance. For medium and light polluted soil, a repairing material can be directly mixed into the soil for passivation and maintenance. The method has the effect of improving the repairing quality by adopting multiple repairing methods for comprehensive treatment.

Description

technical field [0001] The invention relates to the field of soil pollution treatment, in particular to a method for rinsing and repairing acidic heavy metal polluted soil. Background technique [0002] Soil pollution refers to the phenomenon that harmful substances produced by human activities continuously enter the soil, which causes the composition and properties of the soil to change. The soil itself has a certain self-purification ability for external pollutants, but when the content of external pollutants exceeds When the self-purification ability of the soil itself is lost, the nature of the soil itself undergoes vicious mutations, which generally cause harm such as reducing the quality and yield of crops, polluting the surrounding groundwater, and releasing toxic gases, making the soil unusable by humans and difficult to supply around the soil. human habitation life. Among all kinds of pollutants, heavy metals are the most serious and difficult to remove. According...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technical solutions have the following defects: in the actual soil treatment process, it is often difficult to achieve the optimal treatment effect by using a single treatment method, such as for heavily polluted soil, it is easy to use only chemical or physical treatment methods Excessive addition of chemical substances will lead to secondary pollution. If only biological treatment methods are used, the treatment time will be greatly prolonged and it will be difficult to complete the treatment. For light pollution pollution, chemical or physical treatment methods will easily lead to Increased risk of secondary pollution and increased economic costs