Catalytic degradation method for petroleum-contaminated soil

Abstract

The invention discloses a catalytic degradation method for petroleum-contaminated soil. The catalytic degradation method for the petroleum-contaminated soil is characterized in that a mixture of the contaminated soil, water and a catalyst is added into a polytetrafluoroethylene sealed pot and then is placed in a microwave digestion instrument for degradation; the mass of the added catalyst accounts for 0.2%-1.0% of the mass of the contaminated soil, and the mass of the added water accounts for 5.0%-30.0% of the mass of the contaminated soil; the microwave treatment time is 3-11 minutes; according to the microwave treatment conditions, the microwave frequency is 2450 MHz, the rated microwave output power is 400 W, and the pressure is 0.2 MPa. According to the catalytic degradation method for the petroleum-contaminated soil, the pollutant removal efficiency is high, the speed is high, operation is easy, and the cost is low; microwave chemical degradation is conducted, the catalyst added into the contaminated soil is the substance contained in the soil, no toxic effect on the soil can be caused, secondary pollution is avoided, and the method is an environment-friendly method for treating organic compounds in the soil.

Description

technical field The invention relates to a method for catalytic degradation of petroleum-contaminated soil. Background technique 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, naphthenes and aromatic hydrocarbons. Some of these organic compounds can interfere with the endocrine system of animals and affect biological It can cause immune dysfunction, cause cancer, teratogenicity and gene mutation, and pose 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. Therefore, its governance is imperative. At present, the use of remediation technology that combines economic and environmental benefits to control soil oil pollution has attracted more and mo...

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Problems solved by technology

The physical repair method mainly has the disadvantages of high processing costs and incomplete repair

Although the bioremediation method has the advantages of low treatment cost and no secondary pollution, in the actual treatment process, it is obviously affected by environmental factors and climatic conditions, it is difficult to control, and the restoration period is long

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