Solid-phase shallow stirring in-situ chemical oxidation repair method for soil and underground water

Abstract

The invention provides a solid-phase shallow stirring in-situ chemical oxidation repair method for soil and underground water, and belongs to the technical field of soil and underground water repair methods. The solid-phase shallow stirring in-situ chemical oxidation repair method includes the following steps of (1) field leveling and measurement zoning; (2) surface layer crushing and sieving and cofferdam setting; (3) shallow stirring equipment assembling and debugging; (4) solid oxidizing agent and activating agent addition; (5) shallow stirring construction; (6) surface layer curing; (7) chemical reaction and monitoring; and (8) self-inspection and acceptance. The solid-phase shallow stirring in-situ chemical oxidation repair method is suitable for repairing shallow saturated soil and underground water organic pollution and repairing underground water heavy pollution, the problem of being low in parameter of shallow heavy organic pollution chemicals added in the first turn of construction can be solved, and the oxidizing agent K adding ratio upper limit can reach 1.5%-6%. The method is easy and convenient to operate and high in construction efficiency, the reaction period is relatively long, an oxidizing agent and organic matter in the underground water can be reacted in a sustainable mode, and the underground water pollutant concentration regain is effectively prevented.

Description

technical field [0001] The invention relates to a soil and groundwater solid-phase shallow layer stirring in-situ chemical oxidation restoration method, belonging to the technical field of soil and groundwater restoration methods. Background technique [0002] Heavy metal and organic pollution of soil and groundwater are two typical types of pollution at present. The single and compound pollution of shallow contaminated soil and groundwater is common in polluted sites due to many exposure routes. Compared with ex-situ restoration technology, in-situ restoration has the advantages of no secondary pollution and no additional site occupation, and is gradually favored. Soil and groundwater remediation technology mainly adopts physical, chemical and biological or combined technologies. Among them, the first problem to be solved by chemical or biological remediation engineering technology is how to uniformly add remediation agents (oxidants / reductants / microbial agents) to the und...

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Problems solved by technology

[0013] The purpose of the present invention is to solve the above-mentioned problems that the stirring depth of the existing in-situ remediation system is too large, and the injection well or high-pressure injection is difficult to ensure the shallow mixing effect, and further provide a kind of in-situ chemical oxidation of soil and groundwater solid phase shallow stirring Repair method

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