In-situ vacuum negative pressure mass transfer contaminated soil remediation method

Abstract

The invention discloses an in-situ vacuum negative pressure mass transfer contaminated soil remediation method, and belongs to the field of contaminated soil treatment. The method comprises the stepsthat: working bodies (hereinafter referred to as working bodies A) capable of uniformly transmitting vacuum negative pressure in a full-length range and working bodies (hereinafter referred to as working bodies B) capable of uniformly outputting gas, liquid and heat are implanted into contaminated soil to form an array, and the at least one working body B is arranged around any working body A; thesystem is isolated from outside air and heat; the working bodies A is vacuumized, and gas or liquid or heat or a combination of the gas and the liquid is injected through the working bodies B to forma fluid field which is uniform in distribution and controllable in direction; and therefore, volatile organic pollutants or non-volatile organic pollutants or non-volatile organic pollutants or inorganic pollutants or mixed pollutants in the medium-low-permeability polluted soil under the underground water level are removed, due to directional migration of fluid flow, outward random diffusion isavoided, so that a water-stopping, gas-insulating or heat-insulating curtain does not need to be arranged, and the pollution range is not enlarged.

Description

technical field [0001] The invention relates to an in-situ vacuum negative pressure mass transfer polluted soil restoration method, which belongs to the field of polluted soil treatment. Background technique [0002] The in-situ remediation technology of contaminated soil is the preferred solution in many occasions because it does not need to excavate the contaminated soil or even destroy the soil structure. Most of the in-situ remediation technologies of contaminated soil require the input or output of certain fluid state substances into or from the contaminated soil, and the establishment of a controllable and evenly distributed fluid flow in the contaminated soil is a problem that has not been well solved. ; Because of this, the scope of application of many methods is limited. [0003] For example, the leaching method can remove various inorganic pollutants such as heavy metals and various non-volatile organic pollutants such as benzene series, petroleum, halogenated hyd...

AI Technical Summary

Problems solved by technology

However, the above-mentioned various pollutant removal methods can only deal with a certain type of pollutants, and it is difficult to deal with the contaminated soil with multiple pollutants.