A heavy metal contaminated soil remediation agent and its preparation method and use method

Abstract

The invention provides a heavy metal polluted soil remediation agent, a preparation method and an application method thereof. The restoration agent includes the following components in parts by weight: 20-80 parts of mineral materials, 10-70 parts of biomass materials, 5-40 parts of redox agents, 5-50 parts of adsorbents, and pH regulators 0 to 30 copies. The preparation method comprises: mixing the above-mentioned five components in the formulated amount, grinding and sieving to obtain the heavy metal polluted soil remediation agent. The use method includes: mixing the heavy metal polluted soil remediation agent with compound polluted soil, adjusting the water content of the compound polluted soil, and performing soil maintenance and restoration. The heavy metal-contaminated soil remediation agent reduces the leaching concentration of heavy metals in the soil, thereby reducing their mobility and bioavailability, and realizes the stabilization of various heavy metals. It has the advantages of low cost, short remediation period, good remediation effect, wide application range and unique Secondary pollution and other advantages.

Description

Technical field [0001] The present invention belongs to the field of contaminated soil repair technology, and it is related to a heavy metal contamination soil repair agent and a preparation method and method of use. Background technique [0002] Heavy metal stabilization techniques are used in the field of soil restoration, and the soil repair agents involved are diverse, but the mechanism of action is similar. Pollution soil characteristics determine the choice of repairing agents to a certain extent. However, the current heavy metal pollution soil repair pharmaceutical industry has no fixed repair plan, "the local system", "the disease" has become an important principle of conventional in the field of soil restoration. [0003] The development of soil repair pharmacy has been early in foreign countries. At the time, the research of related materials R & D and supporting facilities has been perfect; in the country, it is still in its infancy, most of the pollution venue is stil...

AI Technical Summary

Problems solved by technology

[0006] 1. The restorative material itself has the problem of secondary pollution by heavy metals;

[0007] 2. The component type of the restoration agent is too single, or chemical reagents, or environmentally friendly ingredients;

[0008] 3. The synergistic repair effect between repair agent components needs to be improved;

[0009] 4. There are obvious differences in the application effect of restoration agent materials to contaminated soil from different sources;

[0010] 5. The repair mechanism is single, and the applicable environmental conditions are harsh;

[0011] 6. The repair efficiency is not enough to meet the treatment needs of higher pollution concentrations;

[0012] 7. It is difficult to further expand and optimize the repair time dimension

Images