Method for repairing organic contaminated soil by using micro-emulsion

A technology of organic pollution and microemulsion, which is applied in the restoration of polluted soil, etc., to achieve the effect of low cost, small secondary pollution, and simple and easy-to-obtain ingredients

Inactive Publication Date: 2018-11-16
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems existing in the prior art, the present invention provides a method for repairing organic polluted soil by microemulsion rinsing without adding surf

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] Example 1

[0021] Take 100g of soil from a site polluted by polycyclic aromatic hydrocarbons, remove debris such as gravel and fallen leaves, and let it dry naturally in the air. Use a mortar to crush the sample, grind it through a 60-mesh sieve, and measure the concentration of phenanthrene in the soil sample to be 243.7mg / kg, the concentration of benzo[α]pyrene was 115.4mg / kg.

[0022] Take 0.1 g of fennel oil, add 50.7 mL of a mixture of ethanol and propanol to dissolve it, and gradually add 60 mL of water to dilute until the mass percentage of the mixture of ethanol and propanol is 40%. Take 10g of soil samples into a 150mL Erlenmeyer flask with a stopper, add 50mL of the prepared microemulsion, oscillate in a constant temperature oscillator at 20°C and 160r / min for 5h, centrifuge to get the supernatant, and the removal rate of phenanthrene reaches 80.4%. The removal rate of benzo[α]pyrene was 79%.

Example Embodiment

[0023] Example 2.

[0024] Take the soil of an organic polluted site, remove gravel, dead leaves and other sundries, dry it naturally in the air, smash the sample with a mortar, grind it through a 60-mesh sieve, and measure the benzene concentration in the soil sample to be 43.7mg / kg, The toluene concentration was 837.9 mg / kg.

[0025] Take 1 g of mineral oil, add 76 mL of a mixture of ethanol, butanol and amyl alcohol to dissolve it, and gradually add 39 mL of water to dilute until the mass percentage of the mixture of ethanol, butanol and amyl alcohol is 60%. Take 5g of soil sample into a 150mL Erlenmeyer flask with a stopper, add 100mL of the prepared microemulsion, oscillate in a constant temperature oscillator at 20°C and 160r / min for 1h, centrifuge to take the supernatant, and the removal rate of benzene is measured to reach 81.5% , The removal rate of toluene is up to 83%.

Example Embodiment

[0026] Example 3.

[0027] Take 100g of soil from a site polluted by organochlorine pesticides, remove gravel, fallen leaves and other sundries, let it dry naturally in the air, crush the sample with a mortar, grind it finely through a 60-mesh sieve, and measure the 1,2-Di The concentration of vinyl chloride was 1804 mg / kg, the concentration of dibromochloromethane was 135.2 mg / kg, and the concentration of 1,1,2-trichloroethane was 235 mg / kg.

[0028] Take 0.02 g of castor oil, add 114 mL of a mixture of butanol and dimethyl sulfoxide to dissolve it, and gradually add 110 mL of water to dilute until the mass percentage of the mixture of butanol and dimethyl sulfoxide is 45%. Take 10g of soil sample into a 150mL Erlenmeyer flask with a stopper, add 100mL of the prepared microemulsion, oscillate in a constant temperature oscillator at 20°C and 160r / min for 3h, centrifuge to take the supernatant, and measure 1,2-dichloroethylene The removal rate reaches 82.7%, the removal rate o...

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PUM

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Abstract

The invention discloses a method for repairing organic contaminated soil by using a micro-emulsion. Water, a solvent and oil are mixed according to a certain ratio on the basis of the Ouzo effect principle, and automatically generate a micro-emulsion without adding a surfactant, and the micro-emulsion has an extremely strong solubilizing ability, so the generated micro-emulsion can be used in thewashing remediation of the organic contaminated soil to make organic pollutants in the soil distributed into the obtained leacheate in order to realize the remediation of the organic contaminated soil. The method has the advantages of simplicity in operation, strong practicability, economical property and environmental protection; and compared with methods using conventional micro-emulsion or surfactant leaching, the method using the automatically generated micro-emulsion free from the surfactant as an eluent has the advantages of high organic matter removal efficiency and solving of the problems of surfactant residue and high surfactant cost.

Description

technical field [0001] The invention relates to a method for repairing organic polluted soil by using microemulsion, belonging to the field of regeneration of polluted soil. Background technique [0002] The organic pollution of soil has become one of the environmental problems that are widely concerned all over the world. Organic pollutants in soil include aromatic compounds, polychlorinated organic compounds, pesticides, petroleum, etc. Most of these pollutants are insoluble, toxic, mutagenic, and carcinogenic, and have great harm to human health and ecosystems. In recent years, my country has begun to gradually pay attention to the problem of soil pollution caused by organic matter, and has carried out research on soil organic pollution remediation technology. The remediation technologies of organic contaminated soil mainly include four categories: physical remediation, chemical remediation, physicochemical remediation and biological remediation, and soil leaching belong...

Claims

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Application Information

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IPC IPC(8): B09C1/02
CPCB09C1/02B09C1/025B09C2101/00
Inventor 田森林胡晶李英杰黄建洪胡学伟宁平
Owner KUNMING UNIV OF SCI & TECH
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