Device for repairing heavy metal pollution in soil with in-situ multi-physical field coupling and method

Abstract

The invention relates to a device for repairing heavy metal pollution in soil with in-situ multi-physical field coupling. The device comprises an electrolytic mechanism, a sewage treatment mechanism,at least one water injection well and at least one water sucking well, wherein the electrolytic mechanism comprises a power supply, at least one anode electrode and at least one cathode electrode; theanode electrode and the cathode electrode are respectively connected with the anode of the power supply and the cathode of the power supply; the anode electrode is close to the water injection well;the cathode electrode is close to the water sucking well; both the water injection well and the water sucking well are connected with a sewage treatment mechanism. The invention further relates to a method for repairing heavy metal pollution in soil with in-situ multi-physical field coupling. With the combination of a water power field and an electric power field, soil is repaired, extraction of pollutants which are already adsorbed by an electric field to the anode electrode and the cathode electrode is accelerated by the water power field, and then heavy metals can be removed from soil; on the basis of an in-situ repairing method with multiple physical coupled fields such as electric field-water chemical field-water power field, soil structures and ecological environments of undergroundwater are not damaged, and high repairing efficiency can be achieved.

Description

technical field [0001] The invention relates to the technical field of ecological environment restoration, in particular to a device and method for in-situ multi-physical field coupling restoration of heavy metal pollution in soil. Background technique [0002] With the development of industry and agriculture, soil pollution accidents continue to occur. Relevant data show that as many as 20 million hectares of cultivated land have been polluted by heavy metals in my country, and more than 60 million hectares of farmland have been polluted by various organic pollutants or chemicals. Soil heavy metal pollution has the characteristics of concealment, long-term, irreversible, etc. Soil heavy metal pollution in my country has affected the quality of cultivated land, food safety, and even human health. [0003] At present, the restoration techniques used mainly include various physical and chemical methods and biological methods. Physical and chemical methods mainly include isola...

AI Technical Summary

Problems solved by technology

Physicochemical methods can generally effectively remove pollution in soil, but the process of treatment will seriously affect the structure of soil and the ecological environment of groundwater, and the cost is relatively high.

Although in-situ bioremediation does not damage the ecological environment, the restoration process is slow and inefficient, and its application is limited by soil conditions.

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