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An Electrokinetic Diffusion-Electric Heating Activation Method for Remediation of Organic Polluted Soils

A technology of organic pollution and activation method, which is applied in the field of remediation of organic polluted soil, to achieve the effect of improving stability and safety, improving safety, and improving uniformity

Active Publication Date: 2022-07-01
NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few related studies and related patents on electrokinetic diffusion persulfate and electric heating coupled activation.

Method used

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  • An Electrokinetic Diffusion-Electric Heating Activation Method for Remediation of Organic Polluted Soils
  • An Electrokinetic Diffusion-Electric Heating Activation Method for Remediation of Organic Polluted Soils
  • An Electrokinetic Diffusion-Electric Heating Activation Method for Remediation of Organic Polluted Soils

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: a kind of electrokinetic diffusion-electric heating activation method for remediating organic polluted soil, comprising the following steps:

[0027] S1, soil pretreatment;

[0028] S1-1. Determine the boundary of the organic contaminated soil area, remove the debris on the surface of the contaminated soil area, and use HCl to adjust the pH of the organic contaminated soil to 4;

[0029]S1-2. Excavate the cathode tank at the center of the organic contaminated soil area, excavate the anode tank at a distance of 0.5m from the boundary of the organic contaminated soil area, and excavate multiple dosing wells between the cathode tank and the anode tank according to the triangular method. Simultaneously pre-embed multiple thermocouple heating rods, the thermocouple heating rods and the dosing well are arranged at intervals, and the interval between two adjacent dosing wells is 2m; the excavation depth of the cathode tank, anode tank and dosing well is greater t...

Embodiment 2

[0036] Embodiment 2: a kind of electrokinetic diffusion-electric heating activation method for remediating organic polluted soil, comprising the following steps:

[0037] S1, soil pretreatment;

[0038] S1-1. Determine the boundary of the organic contaminated soil area, remove the debris on the surface of the contaminated soil area, and use deionized water to adjust the moisture content of the organic contaminated soil to 15wt%; by adjusting the moisture content of the organic contaminated soil, the Na 2 S 2 O 8 The diffusion effect of the solution in the organic polluted soil, and at the same time improve the safety of the whole system; use HCl to adjust the pH of the organic polluted soil to 5; evenly lay a clay layer with a thickness of 20cm on the surface of the polluted soil area, and compact it, and then put it on the clay. A cement mortar layer with a thickness of 5cm is laid on the surface of the layer. By laying a clay layer and a cement mortar layer on the surface ...

Embodiment 3

[0046] Embodiment 3: a kind of electrokinetic diffusion-electric heating activation method for remediating organic polluted soil, comprising the following steps:

[0047] S1, soil pretreatment;

[0048] S1-1. Determine the boundary of the organic contaminated soil area, remove the debris on the surface of the contaminated soil area, and use HCl to adjust the pH of the organic contaminated soil to 6;

[0049] S1-2. Excavate the cathode tank at the center of the organic contaminated soil area, excavate the anode tank at a distance of 1.2m from the boundary of the organic contaminated soil area, and excavate multiple dosing wells between the cathode tank and the anode tank according to the triangular method. At the same time, multiple thermocouple heating rods are pre-buried, and the thermocouple heating rods and the dosing wells are arranged at intervals, and the interval between two adjacent dosing wells is 5m; the gap between the thermocouple heating rods and the organic pollu...

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Abstract

The invention discloses an electrodynamic diffusion-electric heating activation method for remediating organic polluted soil. Slots and dosing wells, and pre-embedded thermocouple heating rods; S2. Arrange cathode rods in cathode troughs, lay anode rods in anode troughs, and inject Na into dosing wells 2 S 2 O 8 solution; then an electric field is applied between the cathode and anode rods, causing Na 2 S 2 O 8 The solution is electrodynamically diffused in the soil; S3. Use a thermocouple heating rod to heat the organically polluted soil to make Na 2 S 2 O 8 S in solution 2 O 8 2‑ It is activated by heating and generates strong oxidative free radicals to degrade pollutants in organic polluted soil; the invention has a reasonable design, can realize in-situ restoration of organic polluted soil, and is suitable for mass promotion.

Description

technical field [0001] The invention relates to the technical field of organic polluted soil remediation, in particular to an electrokinetic diffusion-electric heating activation method for remediating organic polluted soil. Background technique [0002] In recent years, with the rapid development of industrialization in my country, the problem of soil pollution has become increasingly serious, which has become a major factor threatening human health and affecting environmental safety. Soil pollution can cause excessive levels of contaminants in crops and accumulate in humans and animals through the food chain, endangering the health of humans and animals, and causing cancer and other diseases in humans. In addition, after the soil is polluted, the polluted topsoil with high concentration of pollutants can easily enter the atmosphere and water under the action of wind and hydraulic force, respectively, resulting in air pollution, surface water and groundwater pollution, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/08
CPCB09C1/085
Inventor 刘国强张亚李旭伟王荐胡哲伟刘勇华牟婷婷
Owner NANJING INST OF ENVIRONMENTAL SCI MINIST OF ECOLOGY & ENVIRONMENT OF THE PEOPLES REPUBLIC OF CHINA