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Combined catalyst and microwave process for degrading total petroleum hydrocarbons in petroleum polluted soil

A technology for petroleum pollution and total petroleum hydrocarbons, applied in the restoration of contaminated soil, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effects of improving degradation efficiency, optimizing digestion time, and being easy to operate

Inactive Publication Date: 2007-08-22
LIAONING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems existing in the current oil-contaminated soil remediation process, the present invention provides a simple, fast, efficient, and non-secondary pollution-free catalyst and microwave combined method for degrading total petroleum hydrocarbons in oil-contaminated soil

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 10g of contaminated soil and 2g of water, add 0.1g of catalyst according to Table 1, and stir until uniform.

[0021] The contaminated soil, water, and catalyst were placed in a 50ml polytetrafluoroethylene sealed tank and placed in a microwave digestion apparatus for degradation. The degradation time was 3 minutes, 5 minutes, 7 minutes, 9 minutes, and 11 minutes, respectively.

[0022] Microwave treatment conditions: microwave frequency 2450MHz, rated microwave output power 400W, pressure 0.2MPa.

[0023] Extraction and determination of total petroleum hydrocarbons from the above-mentioned degraded contaminated soil: transfer the degraded soil sample into a 50ml centrifuge tube, add 20ml of dichloromethane, extract in an ultrasonic ice bath for 30 minutes, centrifuge at 4000rmp for 5 minutes, repeat Ultrasonic and centrifuged three times, the content of total petroleum hydrocarbons was measured by ultraviolet spectrophotometer, and the degradation rate was calcul...

Embodiment 2

[0028] Weigh 10g of polluted soil, add 0.02g of catalyst according to Table 2, and add water in amounts of 10.0%, 16.0%, 20.0%, 24.0% and 30.0% of the mass of polluted soil respectively, and mechanically stir until uniform.

[0029] Put the polluted soil, water and catalyst in a sealed tank of 50ml polytetrafluoroethylene, and place it in a microwave digestion apparatus for degradation, and the degradation time is 7 minutes.

[0030] Microwave treatment conditions: microwave frequency 2450MHz, rated microwave output power 400W, pressure 0.2MPa.

[0031] Extraction and determination of total petroleum hydrocarbons from the above-mentioned degraded contaminated soil: transfer the degraded soil sample into a 50ml centrifuge tube, add 20ml of dichloromethane, extract in an ultrasonic ice bath for 30 minutes, centrifuge at 4000rmp for 5 minutes, repeat the ultrasonic and centrifuged three times, the content of total petroleum hydrocarbons was measured by ultraviolet spectrophotomet...

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Abstract

The present invention relates to degradation of petroleum polluted soil, and is especially combined catalyst and microwave process for degrading total petroleum hydrocarbons in petroleum polluted soil. The process includes setting the mixture of petroleum polluted soil, catalyst in 0.2-1.0 wt% of the soil and water in 5.0-30.0 wt% of the soil inside sealed PTFE tank, and degrading in a microwave slaking apparatus in the conditions of microwave frequency of 2450 MHz, microwave power of 400 W, and pressure of 0.2 MPa for 3-11 min. The present invention has the advantages of high pollutant eliminating efficiency, high speed, easy operation, low cost and no secondary pollution.

Description

technical field [0001] The invention relates to a method for catalytic degradation of petroleum-contaminated soil, in particular to a method for jointly degrading total petroleum hydrocarbons in soil with a catalyst and microwaves. Background technique [0002] During the mining, transportation, processing and consumption of petroleum, it is difficult to avoid pollution to the soil. Its main components are various hydrocarbons such as alkanes, cycloalkanes and aromatic hydrocarbons. Some of these organic compounds can interfere with the endocrine system of animals, affecting biological and The reproduction of human beings causes immune dysfunction, and has the effects of carcinogenesis, teratogenicity and gene mutation, and poses a serious threat to human health and environmental quality. In addition, petroleum hydrocarbon organic compounds are relatively stable in the soil and are difficult to degrade, and the pollution of the soil environment has a tendency to increase. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08B09C1/06B01J21/18B01J21/04B01J23/745
Inventor 李法云谯兴国关伟马溪平张扬肖继光张营
Owner LIAONING UNIVERSITY
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