Nondestructive restoration method for polluted soil

Abstract

The invention provides a nondestructive restoration method for polluted soil, which comprises the following steps: 1, a rotary cultivator is used to crush a soil layer, and when the car advances, the crushed soil is moved into a soil conveying device and fed onto a material stirring and conveying device; 2, adsorbent drop and recovery operations can be performed, wherein when the adsorbent drop operation is performed, magnetic adsorbent is dropped into an adsorbent drop hopper, and at this time, a magnetic separation device is not started; 3, the magnetic adsorbent and the soil are mixed, then fall into the material stirring and conveying device, and are conveyed to the tail part of the car while being stirred and mixed; and 4, recovery operation is performed, the magnetic separation device is started, and the magnetic adsorbent is sucked on a magnetic roll body and discharged into an adsorbent recovery hopper after the magnetic roll body is rotated to a high position. According to the invention, through two operation processes of adsorbent drop and adsorbent recovery, the harmless separation between pollutants such as heavy metal, pesticide and the like in the soil and the soil can be realized.

Description

technical field [0001] The invention relates to a polluted soil remediation technology in the field of environmental protection, belongs to the technical field of polluted soil remediation, and in particular relates to a non-destructive remediation method of polluted soil. Background technique [0002] With the continuous acceleration of industrialization and urbanization, the pollution of heavy metals and organic substances in my country's soil has become more and more prominent. Serious environmental hazards caused by pollution have occurred from time to time and are gradually increasing. According to data, 20 million hectares of land has been polluted by heavy metals nationwide, of which more than 700,000 hectares are seriously polluted, and 130,000 hectares of land have been abandoned due to excessive cadmium content. Soil heavy metal and organic pollution will reduce the quality of agricultural products, affect the quality and use value of soil, and cause harm to human ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a non-destructive repair method for polluted soil. Through the two operation processes of putting in and recycling the adsorbent, the harmless separation of heavy metals and pesticides in the soil from the soil can be realized, avoiding Solving the problem of secondary pollution caused by adsorbent residues in the soil, it is a combination of adsorption and magnetic separation technology, which is a green and environmentally friendly soil restoration method

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