Selective degradation method for petroleum pollutants in soil rich in organic matters

Abstract

The invention provides a selective degradation method for petroleum pollutants in soil rich in organic matters. According to the selective degradation method, a Fenton reagent consisting of hydrogen peroxide and Fe<2+> is taken as an oxidization reagent; and a complex solution of citric acid and calcium chloride is added into a Fe<2+> solution in the Fenton reagent and used as a selective regulator to improve selective oxidative degradation of the Fenton reagent to the petroleum pollutants. TPH (total petroleum hydrocarbons) are selectively degraded by the Fenton reagent, so that the TPH removal rate is increased, the oxidization of SOM (soil organic matter) is reduced, the stability and the utilization rate of hydrogen peroxide in a Fenton system can be improved, and the service life of a hydroxyl radical is prolonged.

Description

technical field

[0001] The invention belongs to the field of oil pollution restoration, and relates to the restoration of oil pollutants in soil rich in organic matter, in particular to a selective degradation method for oil pollutants in soil rich in organic matter. Background technique

[0002] According to incomplete statistics, nearly 600,000 tons of oil enters the environment every year in my country, and the area of ​​oil-contaminated soil is about 75,000 mu (calculated as 50m2 per oil well pollution area), and the intensity of oil pollution is as high as 50-450g / kg. These oil-contaminated soils have the characteristics of high oil concentration, difficult restoration, long residual time, and easy migration into groundwater, causing extremely serious harm to water bodies and the ecological environment, and bringing serious negative effects to the ecology, crops, and human health in polluted areas. influences. At present, among various methods for treating oil-contamin...

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