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
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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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