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Method for improving electrokinetic remediation efficiency of polluted soil and groundwater by artificial focusing

An electric and electric remediation technology for groundwater, applied in the restoration of polluted soil and other directions, can solve problems such as the increase of soil conductivity

Inactive Publication Date: 2011-10-26
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if the electrolyte concentration is high, the amount of electrolyte that diffuses into the soil in the electrode area from the electrode working solution 6 will be greater than the amount that diffuses into the electrode working solution 6 from the soil in the electrode area, so that the conductivity of the soil near the electrode will increase, forming a high conductivity area 3

Method used

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  • Method for improving electrokinetic remediation efficiency of polluted soil and groundwater by artificial focusing
  • Method for improving electrokinetic remediation efficiency of polluted soil and groundwater by artificial focusing
  • Method for improving electrokinetic remediation efficiency of polluted soil and groundwater by artificial focusing

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Embodiment Construction

[0019] (1) Dig out a pit for installing an artificial high-conductivity soil belt 3 between the anode 4 and the cathode 5, and repair the bottom and the pit wall to be level.

[0020] (2) Use the soil excavated from the site as the original soil to prepare high-conductivity soil, backfill it into the pit for compaction, and form artificial high-conductivity soil zone 3. According to the situation on site, if it is considered necessary, it can be installed in the pit after the artificial high-conductivity soil belt 3 is wrapped with high-strength water-permeable geotextile or nylon cloth, so as to facilitate taking out.

[0021] (3) In the artificial high conductivity soil zone 3, press image 3 with Figure 4 The in-situ dynamic sampling device 7 is installed in the arrangement mode.

[0022] (4) When the third group of in-situ dynamic sampling devices 7 located on the downstream end face of the artificial high-conductivity soil belt 3 (the surface close to the electrode 5) ...

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Abstract

The invention relates to an electrokinetic remediation method of polluted soil and groundwater; according to the method, by using the trapping effect of ion-induced voltage well, artificial high-conductance soil is established between a cathode and an anode so as to prepare an artificial focusing zone; upriver pollutants are entrapped in the artificial focusing zone, and downriver pollutants still migrate into the electrode working fluid for removal. The artificial focusing zone rich in pollutants is excavated, and is treated and disposed by a transposition method. The advantages of the method are that: the migration distance and time of upriver pollutants of the artificial focusing zone are shortened, and thus the time, energy consumption and related cost of the electrokinetic remediation of the whole field are reduced.

Description

technical field [0001] The invention relates to a method for artificially creating a focusing phenomenon at a set position based on an ion-induced potential well trapping effect to improve the electrokinetic restoration efficiency of polluted soil and groundwater. Background technique [0002] When the waste water and solid waste generated in the industrial production process enter the soil, it will lead to soil and groundwater pollution. When the site is converted into residential, agricultural and other land, the soil and groundwater must be restored to eliminate the pollutants. [0003] The main methods of soil and groundwater restoration are: (1) physical restoration: physical separation restoration, solidification / stabilization restoration, steam extraction restoration, electric restoration, etc.; (2) chemical restoration: chemical leaching restoration, solvent extraction restoration, High-temperature incineration restoration, redox restoration, etc.; (3) Bioremediation...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 李东
Owner CHONGQING UNIV
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