Microbial soil remediation agent

Abstract

The invention provides a microbial soil remediation agent. The microbial soil remediation agent is prepared from raw materials in parts by weight as follows: 8-12 parts of basic sodium aluminum carbonate, 3-33 parts of bentonite, 12-15 parts of montmorillonite, 3-7 parts of aluminum carbonate, 6-9 parts of ammonium phosphate, 6-8 parts of phosphate, 4-9 parts of limestone flour, 5-7 parts of chitosan, 15-18 parts of corn straw and 8-13 parts of cement. Compared with the prior art, the microbial soil remediation agent has the benefits as follows: heavy metal chromium in soil can be effectively cleaned, soil contaminated by the heavy metal chromium can be quickly remediated, harm of heavy metal pollution to the soil environment can be reduced, the bioavailability of plants for heavy metals can be reduced, and heavy metals are prevented from entering food chains. The microbial soil remediation agent is suitable for industrial remediation, low in treatment cost, high in remediation speed, short in treatment time and good in biodegradability, cannot cause secondary pollution and is a safe and effective remediation agent for heavy metal pollution.

Description

technical field [0001] The invention is a microbial soil remediation agent, which belongs to the technical field of heavy metal contaminated soil remediation. Background technique [0002] At present, the area of ​​soil polluted by heavy metals in China is at least 20 million hectares. According to the national survey of sewage irrigation areas conducted by the Ministry of Agriculture of China, in the sewage irrigation areas of about 1.4 million ha, the area of ​​land polluted by heavy metals accounts for 64.8% of the area of ​​sewage irrigation areas. Heavy metal pollution comes from a wide range of sources, such as unreasonable discharge of "three wastes" in mineral processing and smelting, electroplating, batteries, chemicals, dyes and other industries, sewage irrigation, sludge fertilization, vehicle exhaust emissions in urban transportation, improper disposal of electronic waste, etc., will lead to Heavy metal pollution of soil. Soil heavy metal pollution has the chara...

AI Technical Summary

Problems solved by technology

[0004] At present, the heavy metal-contaminated soil remediation technologies mainly include phytoremediation, electrodynamic remediation, leaching, thermal desorption, vitrification, and solidification and stabilization. Among the above heavy metal-contaminated soil treatment methods, phytoremediation requires considerable It takes a long time (decades or even hundreds of years) and there are problems with the treatment of plants; electrokinetic restoration is only suitable for small areas of pollution, and it is not easy to operate on site; thermal desorption is a method of recovering gas by heating, which is not suitable for on-site The operation and cost are high, and the scope of application is narrow. The vitrification method changes the properties of the soil and is only suitable for serious pollution and small areas. The stabilization method of adding lime improves the pH value of the soil and has an effect on alkaline soil. not good

In short, the current methods generally have problems such as high treatment cost, long treatment time, poor field operability and secondary pollution.

[0005] Although my country's soil remediation industry has just started and the situation of soil heavy metal pollution is severe, the prospect of the remediation industry is optimistic