A post-treatment method for chemical remediation of contaminated soil

Abstract

The invention relates to a post-processing method for chemical restoration of contaminated soil, which uses a soil restoration device, the soil restoration device includes a support frame, a pressure groove unit and a repair unit, and the inner walls at the front and rear ends of the support frame are installed with The pressure groove unit is provided with a repair unit in the support frame; the repair method for polluted soil provided by the present invention, the treatment liquid is fully and evenly sprinkled into the polluted soil through the form of drip irrigation, and the treatment liquid and the polluted soil are fully contacted and reacted , so as to solve the problem that part of the soil is often still polluted and the treatment is not thorough enough; the invention separates and presses the polluted soil into a liquid guide groove, thereby improving the treatment efficiency of the polluted soil and exporting the waste liquid in the soil, Therefore, the problem that the waste liquid formed after the treatment liquid reacts with the polluted soil cannot be discharged and is absorbed by the soil inside the soil to form secondary pollution is solved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to a post-treatment method for chemical remediation of polluted soil. Background technique [0002] At present, about 200 million mu of cultivated land in China has food safety and ecological safety problems, and nearly 30% of the land has been moderately or severely polluted by heavy metals. Among them, some areas in Liaoning, Hunan, Zhejiang, Jiangxi, Sichuan, Guizhou, Guangdong, Guangxi and other provinces have heavy metal pollution problems to varying degrees, and most of the soils have compound pollution of volatile organic compounds and cadmium, and most of them are polluted by cadmium. Mainly factories and mines. Exhaust gas, waste water, waste residues, vehicle exhaust emissions from industrial and mining enterprises, sludge from sewage treatment plants, industrial wastewater and slag dumping cause a large amount of soil compound pollution, sewage irrigation, chemi...

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Problems solved by technology

[0003] The treatment methods of chemical remediation of contaminated soil often have the following problems: 1. The treatment solution cannot fully contact the contaminated soil, resulting in part of the soil often still being polluted, and the treatment is not thorough enough, so that the overall contaminated soil is still in a polluted state; 2. The waste liquid formed after the treatment liquid reacts with the polluted soil cannot be discharged, and is absorbed by the soil inside the soil to form secondary pollution

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