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An electrokinetic remediation method for low-permeability polluted soils

A technology of polluted soil and electric restoration, applied in the field of contaminated soil restoration, can solve the problems of soil pH imbalance and achieve the effect of increasing the pH of the anode, high practical value, and broad application prospects

Active Publication Date: 2021-07-30
南京迪天高新产业技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the above technical problems, the present invention provides an electrokinetic remediation method for low-osmosis polluted soil, which can efficiently remove pollutants in the soil, and effectively control the pH of the cathode and anode to prevent soil pH imbalance problems, with high practical value and broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]An electrodynamic restoration method for low-osmosis polluted soil. A positive electrolytic cell and a negative electrolytic cell are arranged within a certain distance, a cathode regulator is added to the negative electrolytic cell, an anode regulator is added to the positive electrolytic cell, The pool is equipped with electrodes and connected to a regulated DC power supply, and the polluted soil is electrodynamically repaired by turning on the power supply, with a voltage gradient of 0.5-7.0V / cm.

[0038] Adding regulators to the anode and cathode, the cathode regulator can effectively reduce the pH during the electrokinetic repair process, ease the migration of hydroxide ions to the anode, and enrich the heavy metal ions near the cathode; the anode regulator can be effective in the electrokinetic repair process Increase the pH of the anode, and use zero-valent iron to reduce heavy metals. The added beneficial bacteria can degrade and absorb pollutants to a certain ext...

Embodiment 2

[0049] An electrodynamic restoration method for low-osmosis polluted soil. A positive electrolytic cell and a negative electrolytic cell are arranged within a certain distance, a cathode regulator is added to the negative electrolytic cell, an anode regulator is added to the positive electrolytic cell, The pool is equipped with electrodes and connected to a regulated DC power supply, and the polluted soil is electrodynamically repaired by turning on the power supply, with a voltage gradient of 0.5-7.0V / cm.

[0050] The anode conditioner includes the following components by weight: 50 parts of iron-loaded modified attapulgite, 50 parts of iron-loaded modified montmorillonite, 8 parts of reduced iron, 5 parts of waste beer yeast, 5 parts of bacillus, sulfuric acid Salt-reducing bacteria 5 parts.

[0051] The anode conditioner is prepared by the following method:

[0052] (1) Add an emulsifier to the oil recovered from kitchen waste and mix evenly. As an oil phase, dissolve wast...

Embodiment 3

[0068] An electrodynamic restoration method for low-osmosis polluted soil. A positive electrolytic cell and a negative electrolytic cell are arranged within a certain distance, a cathode regulator is added to the negative electrolytic cell, an anode regulator is added to the positive electrolytic cell, The pool is equipped with electrodes and connected to a regulated DC power supply, and the polluted soil is electrodynamically repaired by turning on the power supply, with a voltage gradient of 0.5-7.0V / cm.

[0069] The anode conditioner includes the following components by weight: 40 parts of iron-loaded modified attapulgite, 4 parts of iron-loaded modified montmorillonite, 6 parts of reduced iron, 4 parts of waste beer yeast, 3 parts of Bacillus, sulfuric acid Salt reducing bacteria 4 parts.

[0070] The anode conditioner is prepared by the following method:

[0071] (1) Add an emulsifier to the oil recovered from kitchen waste and mix evenly. As an oil phase, dissolve waste...

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Abstract

The invention belongs to the technical field of remediation of polluted soil, and in particular relates to an electric remediation method for low-osmosis polluted soil. A positive electrolytic cell and a negative electrolytic cell are arranged within a certain distance, and a cathode regulator is added to the negative electrolytic cell, and an anode is added to the positive electrolytic cell. Regulator, the cathode regulator includes the following components: acid-modified attapulgite, acid-modified diatomite, rhamnolipid; the anode conditioner includes the following components: iron-loaded modified attapulgite, Iron-loaded modified montmorillonite, reduced iron, waste brewer's yeast, Bacillus and sulfate-reducing bacteria. The electric restoration method described in the present invention can not only efficiently remove pollutants in the soil, but also effectively control the pH of the anode and the anode, so as to prevent the imbalance of soil pH, and has high practical value and broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of remediation of polluted soil, and in particular relates to an electrodynamic remediation method for low-permeability polluted soil. Background technique [0002] Electrokinetic restoration technology is a new chemical technology method for treating polluted soil. Electrokinetic restoration is to drive pollutants to concentrate in the electrode area through the combined action of electrochemistry and electrokinetics (electroosmosis, electromigration, and electrophoresis, etc.) for centralized treatment. or separation process. The basic principle of electrokinetic remediation is to apply direct current on both sides of the polluted soil, and form an electric field after the direct current is applied. The pollutants in the soil will migrate directionally under the action of the direct current electric field, enrich in the electrode area, and then pass other methods (electroplating, precipitation / co-precipita...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
CPCB09C1/085
Inventor 任欢鱼郑伟张慧
Owner 南京迪天高新产业技术研究院有限公司
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