Polluted soil and underground water in-situ reaction zone repairing system and repairing method

Abstract

The invention discloses a polluted soil and underground water in-situ reaction zone repairing system which comprises a direct-current power supply, an even number of electrode wells, an even number of electrodes and an extraction and treatment system, wherein the electrode wells are arranged in the downstream direction of the underground water flow direction of a pollution source; the bottoms of the electrode wells are positioned on a soil aquifer; electrolyte is formed through permeation of underground water into the electrode wells in the electrode wells; the number of the electrodes is equal to that of the electrode wells; an electrode is inserted in each electrode well; the electrodes are inserted in the bottoms of the electrode wells; the height of each electrode is equal to or greater than the height of the liquid surface of the electrolyte in the corresponding electrode well; half of the electrodes are connected with the anode of the direct-current power supply, and the other half of the electrodes are connected with the cathode of the direct-current power supply; and a pipeline provided with a filter is adopted to extract the electrolyte of each electrode well. The polluted soil and underground water in-situ reaction zone repairing system facilitates interception and concentration of pollutants in underground water and facilitates diffusion and migration of nutrient substances.

Description

technical field [0001] The invention relates to an in-situ intensified restoration system for contaminated soil and groundwater, belonging to the technical field of pollution control in environmental protection. Background technique [0002] Extraction treatment technology is widely used in the restoration of polluted groundwater. The principle is to extract the polluted groundwater and use the water treatment facilities on the ground to treat it harmlessly. After the treatment reaches the standard, the water can be recharged to the ground or Discharge into surface water bodies. [0003] Because the extraction treatment requires the extraction of a large amount of water, it is generally necessary to deploy a large number of pumping wells in the restoration area. If the site does not have the conditions to build a large number of wells, it will affect the implementation of the restoration; the extraction of a large amount of groundwater will affect the local hydrogeology of t...

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Problems solved by technology

[0003] Because the extraction treatment requires the extraction of a large amount of water, it is generally necessary to deploy a large number of pumping wells in the restoration area. If the site does not have the conditions to build a large number of wells, it will affect the implementation of the restoration; the extraction of a large amount of groundwater will affect the local hydrogeology of the restoration area. conditions, may have adverse effects on the stability of surrounding buildings and structures; the extraction and treatment of a large amount of groundwater increases the cost of repair construction; after the extraction reaches the standard, after a period of time, there will often be a "rebound phenomenon", that is, pollutants in groundwater The content exceeds the standard, which will lead to a longer recovery period for extraction treatment

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