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Efficient chemical oxidation repairing method for organic polluted soil

A technology of organic pollution and chemical oxidation, applied in the restoration of polluted soil, etc., can solve the problems of affecting the chroma of the effluent, difficult to handle, and large chemical sludge production, and achieves the benefits of removal, promotion of dissolution, and human and environmental safety Effect

Active Publication Date: 2018-09-04
BEIJING GEOENVIRON ENG & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, the controllable release of OH overcomes the classic Fenton reagent's easy reaction with soil organic matter and the generation of H 2 o 2 Ineffective decomposition; on the other hand, reduced Fe 2+ The addition of , solves the problem of Fe 2+ The addition of Fe 3+ Affect the chromaticity of the effluent, large output of chemical sludge and difficult to handle, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Select the soil with heavy organic pollution in the site, the content of BCH is 48.3mg / kg, and the content of benzo(a)pyrene is 4.7mg / kg. Accurately weigh 10g of organic contaminated soil, add 30ml of water to the soil to make a muddy soil mixture. Add 0.1g GLDA and 0.4g Tween80 sequentially to the mud-soil mixture, stir well, and then add 0.6g SPC. The reaction system was placed in a desktop constant temperature culture shaker and shaken at room temperature (25° C.) for 24 hours at a speed of 180 r / min. After the reaction, the organic pollutants in the soil were quantitatively detected. The results showed that the degradation rate of BHC in soil reached 90%, and the degradation rate of benzo(a)pyrene reached 85%.

Embodiment 2

[0048] Select the soil with heavy BCH pollution in the site, the content of BCH is 45.0mg / kg, and the content of benzo(a)pyrene is 4.6mg / kg. Accurately weigh 10g of organic polluted soil, add 10ml of water to the soil to make a muddy soil mixture. Add 0.09g GLDA and 0.38g Tween80 in sequence to the mud-soil mixture, stir well, and then add 0.55g SPC. The reaction system was placed in a desktop constant temperature culture shaker and shaken at room temperature for 18 hours at a speed of 190 r / min. After the reaction, the organic pollutants in the soil were quantitatively detected. The results showed that the degradation rate of BHC in soil reached 84%, and the degradation rate of benzo(a)pyrene reached 81%.

Embodiment 3

[0050] The soil with heavy BCH pollution in the site was selected, the content of BCH was 42.6mg / kg, and the content of benzo(a)pyrene was 4.9mg / kg. Accurately weigh 10g of organic polluted soil, add 25ml of water to the soil to make a muddy soil mixture. Add 0.075g GLDA and 0.28g Tween80 to the mud-soil mixture in sequence, and then add 0.48g SPC after stirring evenly. The reaction system was placed in a desktop constant temperature culture shaker and shaken at room temperature for 18 hours at a speed of 130 r / min. After the reaction, the organic pollutants in the soil were quantitatively detected. The results showed that the degradation rate of BCH in soil reached 81%, and the degradation rate of benzo(a)pyrene reached 78%.

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Abstract

The invention discloses an efficient chemical oxidation repairing method for organic polluted soil. The efficient chemical oxidation repairing method for the organic polluted soil comprises the following steps: mixing the organic polluted soil and water to prepare a slurry-state soil mixed solution; adding a binary compound organism-nonionic surfactant into the slurry-state soil mixed solution andthen adding an oxidizing agent; and performing oscillation in an oscillator and degrading the organic pollutant in the soil after oscillation treatment, wherein the oxidizing agent is SPC and the binary compound organism-nonionic surfactant is GLDA and Tween80. The efficient chemical oxidation repairing method for the organic polluted soil has the advantages of simple process condition, low operation requirement, high treatment efficiency and the like, and is suitable for repairing various kinds of organic polluted soil.

Description

technical field [0001] The invention belongs to the technical field of treatment and repair of organic polluted soil, and in particular relates to an efficient chemical oxidation repair method for organic polluted soil. Background technique [0002] Organic pollutants in the environment refer to organic compounds that cause environmental pollution and have harmful effects on the ecosystem, mainly artificially synthesized organic pollutants. Synthetic organic pollutants refer to a class of organic chemical substances that do not exist in the natural environment and are artificially synthesized, such as various pesticides, polycyclic aromatic hydrocarbons, polychlorinated biphenyls, and synthetic rubber. Due to the widespread use in industry and agriculture, a large amount of artificially synthesized organic pollutants are released into the environment. At present, environmental pollution caused by organic pollutants has become a global problem. How to effectively remove organ...

Claims

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Application Information

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IPC IPC(8): B09C1/08
CPCB09C1/08
Inventor 方华祥刘泽军陈望明甄胜利魏丽吕正勇李淑彩范吉强朱湖地郭明达田森张岩唐先进
Owner BEIJING GEOENVIRON ENG & TECH
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