Heavy metal contaminated soil remediation agent and preparation method thereof

Abstract

The invention discloses a heavy metal contaminated soil remediation agent and a preparation method thereof. The heavy metal contaminated soil remediation agent is prepared from the following raw materials in parts by weight: 40-50 parts of EM microbial agent, 0.06-0.1 part of matrine, 1-2 parts of polyacrylamide, 20-30 parts of meerschaum, 15-25 parts of attapulgite, 3-5 parts of polyaluminium, 3-5 parts of water-proof agent, 50-90 parts of lentinan, 4-6 parts of bacillus subtilis fermentation solution, 5-10 parts of sargassum pallidum extract, 3-5 parts of lime, and 10-20 parts of coconut shell activated carbon. The heavy metal contaminated soil remediation agent is low-cost, is easy to operate, has a good use effect, is suitable for large-scale promotion, has high processing speed, is low in consumption, and is easy to transport and store due to the powder state. The heavy metal contaminated soil remediation agent is applied on site, an operator fully mixes the remediation agent withcontaminated soil containing liquid hydrocarbon and heavy metals, so as to adsorb contaminants deeply, then the remediation agent is naturally put at an open space on the site, and does not contaminate the environment for the secondary time, thereby realizing ecological treatment.

Description

technical field [0001] The invention relates to the technical field of soil pollution control, in particular to a heavy metal polluted soil remediation agent and a preparation method thereof. Background technique [0002] In recent years, the problem of heavy metal pollution in my country's soil has become increasingly prominent, posing a serious threat to the ecological environment, food safety and human health, which cannot be ignored. Waste gas, waste water, and waste residues discharged from industries such as dyestuffs, chemicals, tanning, mineral mining, smelting, and processing contain a large amount of heavy metals, which can be accumulated through irrigation (especially sewage irrigation), solid waste (sludge, garbage, etc.) and other ways into the soil, resulting in an increase in the content of heavy metals in the soil, especially the heavy metals in the exchangeable state. When heavy metals entering the environment exceed their capacity in the environment, heavy...

AI Technical Summary

Problems solved by technology

[0004] The above heavy metal repair techniques all have a certain effect on heavy metal repair, but they also have their own shortcomings in practical applications.

Phytoremediation technology has limited types of plants for remediation, and its repair speed is slow, and the reprocessing of plants that accumulate a large amount of heavy metals is also the main factor that limits the large-scale promotion of phytoremediation technology; microbial remediation technology generally only adsorbs a single heavy metal. The effect is good, and because the microbial organisms are small, the amount of heavy metals repaired is also small, so this also limits the application of using microorganisms for large-scale on-site repair; the electrodynamic repair technology is still in the experimental research stage, and due to different soil Different physical and chemical properties also have a series of limiting factors in practical application; soil leaching technology is complex and expensive;