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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AI-Extracted 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 oth...

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Method used

The present invention adopts sodium percarbonate to replace traditional oxidizing agent, utilizes binary compound biological-nonionic surfactant stable SPC to release H slowly O , H O in binary compound biological-nonionic surfactant from soil particles The chelated metal ions are activated to release OH·, and efficiently and thoroughly oxidize and remove organic pollutants in the soil. On the one hand, OH can be released in a contro...

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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.

Application Domain

Contaminated soil reclamation

Technology Topic

PollutantEnvironmental chemistry +9

Examples

Experimental program(10)

Example Embodiment

[0045] Example 1

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

Example Embodiment

[0047] Example 2

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

Example Embodiment

[0049] Example 3

[0050] Select the heavily polluted soil of BHC in the site, the BHC content is 42.6mg/kg, and the benzo(a)pyrene content is 4.9mg/kg. Accurately weigh 10g of organically contaminated soil, add 25ml of water to the soil to make a muddy soil mixture. Add 0.075g of GLDA and 0.28g of Tween80 to the muddy soil mixture in sequence, and after stirring evenly, add 0.48g of SPC. The reaction system was placed in a benchtop constant temperature culture shaker and oscillated at room temperature for 18 hours, and oscillated at a rotation speed of 130 r/min. After the reaction, the organic pollutants in the soil are quantitatively detected. The results showed that the degradation rate of BHC in the soil reached 81%, and the degradation rate of benzo(a)pyrene reached 78%.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Promote dissolution
Improve efficiency

Efficient chemical oxidation repairing method for organic polluted soil

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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