Electrolyte for soil remediation, electrolysis system for soil remediation and soil remediation method of electrolysis system for soil remediation

Abstract

The invention relates to the technical field of environmental protection, in particular to a technology for remedying organic polluted soil and compound polluted soil and specifically relates to an electrolyte for soil remediation, an electrolysis system for soil remediation and a soil remediation method of the electrolysis system for soil remediation. According to the soil remediation method, remediation is conducted through the electrolysis system for soil remediation. The soil remediation method specifically comprises the following steps that a remediation section of an electrode chamber is inserted into a soil area to be remedied through a fixing section, the remediation section is connected with an electrolyte storage chamber through a first pipeline and a second pipeline, electrolyte is poured into the metal electrode chamber and the electrolyte storage chamber, and the electrolyte enters the soil to be remedied under the action of electroosmosis flow and the like. By the adoption of the soil remediation method, under the combined action of the electrolysis system and the electrolyte, the risk of secondary soil pollution is lowered during soil remediation, and the soil remediation cost is reduced because of circulation of the electrolyte.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a technology for repairing toxic metal-contaminated soil, organic matter-contaminated soil and composite polluted soil by using a novel environment-friendly electrolyte enhanced electrodynamic repair technology, and specifically relates to an electrolyte for soil repair , Electrolysis system and soil remediation method thereof. Background technique [0002] With the process of industrialization and urbanization in our country, the problem of soil pollution has begun to appear. According to the survey conducted by the Ministry of Agriculture on the national sewage irrigation areas, among the approximately 1.4 million hectares of sewage irrigation areas, the land area polluted by toxic metals accounts for 64.8% of the sewage irrigation areas. The organic pollutants in the soil mainly come from industrial "three wastes" and organic pesticides. The more common ones ...

AI Technical Summary

Problems solved by technology

This not only causes a sharp reduction in the service life of the electrode, but also reduces the repair current due to electrode fouling and corrosion, which in turn affects the repair effect

However, the reaction of electrolyzed water in electrodynamic restoration causes acidification and alkalinization of the soil between the positive and negative electrodes, resulting in weakening of the electroosmotic flow, and the precipitation of toxic metals to be removed in the soil is another problem faced by electrodynamic restoration engineering.

Traditionally, lye and acid are used to neutralize the positive and negative electrode solutions, which have strong drug properties and will corrode the electrodes. If the control is not good, it will lead to acidification or alkalization of the soil; it also lacks dissolution promoting effect on organic matter, and the removal effect is low, so it is necessary to use a surface active agent

These acid-base and chelating agents will cause a certain degree of damage to the soil system, endanger ecological security, and even introduce new pollutants, which will affect the environmental protection of the project.

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