Chemical oxidation restoration method for organic polluted soil

Abstract

The invention provides a chemical oxidation restoration method for organic polluted soil. The chemical oxidation restoration method for the organic polluted soil comprises the step of injecting a pH regulating agent, an oxidizing agent and a catalyst in situ to oxidize organic matters in soil and specifically comprises the following steps: in a to-be-restored soil region, drilling and stirring to the to-be-restored depth by utilizing a bored pile drilling machine, pumping the pH regulating agent by virtue of a flexible pipe arranged inside a drill rod by adopting a pump while the drill rod drills into the soil, uniformly distributing a medicament into the soil under the stirring action of the drill rod, and regulating pH of the soil to be in an appropriate range; and under the condition that a drill lifting rod is used for stirring, switching to an oxidizing agent pipeline and a catalyst pipeline by utilizing a valve, and pumping the oxidizing agent and the catalyst as well as a chelating agent into the soil by virtue of a pump, so that oxidative degradation on organic pollutants in the soil is realized.

Description

technical field [0001] The invention relates to a method for chemical oxidation restoration of organic polluted soil, which belongs to the technical field of environmental engineering and is suitable for restoration of various types of organic polluted soils such as chemical industry, petroleum, medicine and pesticide. Background technique [0002] With the rapid development of the modern chemical industry, more and more organic pollutants enter the soil and groundwater, which are difficult to be degraded by microorganisms in the environment, resulting in increasingly serious soil pollution. Now, with the acceleration of urbanization and industrialization in our country, especially the adjustment of urban layout and industrial structure, many chemical enterprises are closed or relocated. The production areas of chemical enterprises are polluted to varying degrees due to leakage during production and other reasons. The areas left after the closure or relocation of enterprise...

AI Technical Summary

Problems solved by technology

The problems with these technologies are: the injection well needs to be excavated into the contaminated area, and the excavation will generate spoils, especially the polluted spoils need additional treatment

Secondly, these techniques are only applicable to unsaturated soils, and generally the restoration depth is relatively shallow, and are greatly limited by the permeability of the soil. These methods will not work when

Thirdly, the amount of reagent injection is not easy to control, if the injection amount is too small, it will lead to incomplete repair; if the injection amount is too large, it may cause volatile polluting gases to escape into the atmosphere above the ground, causing further pollution

When the pollutants are distributed in a large vertical range and the concentration varies greatly along the vertical direction, the traditional method cannot inject an appropriate amount of remediation reagents for the pollution concentrations at different depths

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