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Method for repairing organic polluted soil by intensifying Fenton oxidation

A technology for organic pollution and oxidation remediation, applied in the field of contaminated soil remediation, can solve the problems of poor remediation effect and low utilization rate of Fenton system, achieve the effect of strengthening Fenton oxidation effect, simple and easy operation, and good treatment effect

Active Publication Date: 2015-03-11
JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a kind of method that strengthens Fenton oxidation repairing organic polluted soil, solves the H in remediation process of refractory organic polluted soil. 2 o 2 Problems such as low utilization rate and poor repair effect of Fenton system

Method used

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  • Method for repairing organic polluted soil by intensifying Fenton oxidation

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The specific implementation steps of the present invention are as follows:

[0036] (1) Select 500g of organic contaminated soil to be repaired, grind and pulverize it, and then sieve it with a 10-mesh steel sieve, and maintain the soil for 24 hours;

[0037] (2) Add 5g ferrous sulfate to the organic polluted soil obtained in step (1), mechanically stir and mix, soil maintenance 24h;

[0038] (3) Get 5g27.5% industrial hydrogen peroxide, 10g water, stir and mix;

[0039] (4) In the organic contaminated soil obtained in step (2), evenly spray the solution obtained in step (3), mechanically stir and mix evenly, and soil maintenance for 5 days;

[0040] (5) Monitor the concentration of organic matter in the soil and evaluate the remediation effect of organic polluted soil.

Embodiment 2

[0042] The specific implementation steps of the present invention are as follows:

[0043] (1) Select 500g of organic polluted soil to be repaired, grind and pulverize it, and then sieve it with a 10-mesh steel sieve;

[0044] (2) Add 1.7g powdered activated carbon to the organic polluted soil obtained in step (1), mechanically stir and mix evenly, soil maintenance 24h;

[0045] (3) Add 5g of ferrous sulfate to the organic polluted soil obtained in step (2), mechanically stir and mix, soil maintenance 24h;

[0046] (4) Get 5g27.5% industrial hydrogen peroxide, 10g water, stir and mix;

[0047] (5) In the organic contaminated soil obtained in step (3), evenly spray the solution obtained in step (4), mechanically stir and mix evenly, and maintain the soil for 5 days;

[0048] (6) Monitor the concentration of organic matter in the soil and evaluate the remediation effect of organic polluted soil.

Embodiment 3

[0050] The specific implementation steps of the present invention are as follows:

[0051] (1) Select 500g of organic polluted soil to be repaired, grind and pulverize it, and then sieve it with a 10-mesh steel sieve;

[0052] (2) Add 4.2g sodium oxalate to the organic contaminated soil obtained in step (1), mechanically stir and mix evenly, and soil maintenance for 24h;

[0053] (3) Add 5g of ferrous sulfate to the organic polluted soil obtained in step (2), mechanically stir and mix, soil maintenance 24h;

[0054] (4) Get 5g27.5% industrial hydrogen peroxide, 10g water, stir and mix;

[0055] (5) In the organic contaminated soil obtained in step (3), evenly spray the solution obtained in step (4), mechanically stir and mix evenly, and maintain the soil for 5 days;

[0056] (6) Monitor the concentration of organic matter in the soil and evaluate the remediation effect of organic polluted soil.

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Abstract

The invention relates to the field of polluted soil repair, particularly to a method for repairing organic polluted soil by intensifying Fenton oxidation. The method comprises the following steps: (1) selecting organic pollution soil to be repaired, grinding and crushing, and screening by using a 10-mesh steel screen; (2) adding an enhancer powdery active carbon, sodium oxalate and disodium EDTA (ethylene diamine tetraacetic acid), uniformly mixing and maintaining soil; (3) adding a catalyst ferrous sulfate, uniformly mixing and maintaining soil; (4) adding diluted industrial hydrogen peroxide, uniformly mixing, and maintaining soil. The method provided by the invention has the benefits that the active carbon powder is added to absorb organic matters so as to enhance the reaction probability of the organic matters and hydrogen peroxide; sodium oxalate is added to provide a continuous hydrogen peroxide source; ferrous sulfate is added to catalyze and enhance the oxidizing ability of hydrogen peroxide, so that the Fenton repair effect is improved; disodium EDTA is added and Fe<2+> form is controlled and maintained by virtue of a chelating effect. By virtue of the above intensifying measures, the polluted soil can be quickly and effectively repaired, so that the content of the organic matters in soil reaches national ambient air quality standard.

Description

technical field [0001] The invention belongs to the field of contaminated soil remediation, and in particular relates to a method for strengthening Fenton oxidation to remediate organic polluted soil. Background technique [0002] With the rapid development of modern industry, the problem of soil pollution of refractory organic matter is becoming more and more serious, which not only affects the environmental quality of soil, but also may affect human health through various channels. [0003] Fenton oxidation has become a widely used technology in the remediation of organic contaminated soil due to its strong oxidation ability with low selectivity and no secondary pollution. But H 2 o 2 It is unstable itself, and the presence of organic matter and minerals in the soil will promote H 2 o 2 The ineffective decomposition of H 2 o 2 The effective utilization rate leads to the unsatisfactory repair effect of the Fenton system. [0004] Chen Xiong of Hunan University improv...

Claims

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Application Information

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IPC IPC(8): B09C1/08
Inventor 李玲唐晓声
Owner JIANGSU SUNTIME ENVIRONMENTAL REMEDIATION
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