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Organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system and method

An advanced oxidation and organic pollution technology, applied in the field of soil remediation, can solve the problems of low removal efficiency, accelerated pollutant migration and enrichment ability, etc., and achieve the effect of reducing dosage and cost

Pending Publication Date: 2018-07-27
HENAN INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology only relies on the electrokinetic effect and active agents to accelerate the migration and enrichment of pollutants. The actual removal efficiency is not high, and the enriched pollutants often need further treatment.

Method used

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  • Organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system and method
  • Organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system and method
  • Organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] The electrodynamic coupling advanced oxidation in-situ remediation system and method for organic polluted soil mainly includes the following steps:

[0065] A total of three groups of experiments were carried out for comparison. The first group did not add advanced oxidants, the second group added calcium peroxide, the third group added calcium peroxide and sodium persulfate, and the rest of the conditions were the same.

[0066] The distance between cathode and anode of the device is 18cm, and a sampling point is set every 3cm, and there are 6 sampling points in total.

[0067] The first set of experimental steps are as follows:

[0068] (1) Evenly mix 1100g of soil with a certain concentration of phenol aqueous solution so that the concentration of phenol in the soil is 500mg / kg. Stand by after 24 hours;

[0069] (2) Fill the configured soil into the soil reaction chamber 1 .

[0070] (3) Add 0.01mol / L electrolyte to the anode tank 2 and cathode tank 3 through the ...

Embodiment 2

[0086] The electrodynamic coupling advanced oxidation in-situ remediation system and method for organic polluted soil mainly includes the following steps:

[0087] A total of three groups of experiments were carried out for comparison. The first group did not add advanced oxidants, the second group added calcium peroxide, and the third group added loaded calcium peroxide with montmorillonite as the carrier, and the rest of the conditions were the same.

[0088] The distance between cathode and anode of the device is 30cm, and a sampling point is set every 5cm, and there are 6 sampling points in total.

[0089] The first set of experimental steps are as follows:

[0090] (1) Evenly mix 2000g of soil with a certain concentration of phenol aqueous solution so that the concentration of phenol in the soil is 800mg / kg. Stand by after 24 hours;

[0091](2) Fill the configured soil into the soil reaction chamber 1 .

[0092] (3) Add 0.01mol / L electrolyte to the anode tank 2 and cat...

Embodiment 3

[0108] The electrodynamic coupling advanced oxidation in-situ remediation system and method for organic polluted soil mainly includes the following steps:

[0109] A total of three groups of experiments were carried out for comparison. Under the conditions of ultraviolet light irradiation, the first group did not add advanced oxidants, the second group added calcium peroxide, the third group added calcium peroxide and sodium persulfate, and the rest of the conditions were the same.

[0110] The distance between cathode and anode of the device is 42cm, and a sampling point is set every 7cm, and there are 6 sampling points in total.

[0111] The first set of experimental steps are as follows:

[0112] (1) Evenly mix 2500g of soil with a certain concentration of nitrobenzene aqueous solution so that the concentration of nitrobenzene in the soil is 800mg / kg. Stand by after 24 hours;

[0113] (2) Fill the configured soil into the soil reaction chamber 1 .

[0114] (3) Add 0.01mo...

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Abstract

The invention provides an organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system. The organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system comprises a power source, a soil reaction chamber, an anode tank, a cathode tank and an advanced oxidizer dispensing device, the soil reaction chamber, the anode tank and the cathode tank are all of round barrel body structures which are arranged horizontally, the left end of the soil reaction chamber is connected with the right end of the anode tank through a left flange plate component, the left side and the right side of the soil reaction chamber are separated from the anode tank and the cathode tank by filter cloth correspondingly, the inner right side of the anode tank is provided with an anode plate parallel to the filter cloth, the positive pole of the power source is connected with the anode plate by an anode wire penetrating through a left wire penetrating hole, and the inner left side of the cathode tank is provided with a cathode plate parallel to the filter cloth. The invention further discloses an organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration method. The organic contaminated soil electrodynamic coupling advanced oxidation in-situ restoration system is reasonable in design and simple in structure, the soil in-situ restoration process is convenient to operate, the pollutant removal efficiency is high, pollutants are thoroughly removed, and further treatment performed on the pollutants is not needed.

Description

technical field [0001] The invention belongs to the field of soil remediation, and in particular relates to an electrodynamically coupled advanced oxidation in-situ remediation system and method for organic polluted soil. Background technique [0002] With the rapid development of my country's economy and the transformation of economic structure, a large number of factories and enterprises have been closed and relocated, resulting in the emergence of large areas of organic pollution. As land resources become less and less, these organically polluted sites are facing redevelopment and reuse, but these sites polluted by organic pollutants have huge risks, which seriously threaten the environment and human health, and become an environmental problem that needs to be solved urgently. . [0003] At present, the remediation of organic contaminated soil is mainly divided into two methods: in-situ remediation and ex-situ remediation. Compared with ex-situ remediation, in-situ remed...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/085
Inventor 李亚林刘蕾杨磊黄子玲李福光
Owner HENAN INST OF ENG