Chromium contamination in-situ remediation method

Abstract

The present invention discloses a chromium contamination in-situ remediation method, which comprises: 1) injection points are arranged and the dosage of a repair agent is determined, wherein it is ensured that the repair agent covers all the place to be repaired; 2) the repair agent is prepared; 3) a drilling system is provided with depth fixation equipment for positioning the injection points; and 4) the repair agent is subjected to high pressure injection. The in-situ remediation system suitable for the remediation method comprises the drilling system for supporting the operation and the agent mixing and injection system. According to the present invention, the large-scale infrastructure investment and building is not required, the stratum structure is not basically destroyed, the stratum condition does not affect the high pressure injection, the repair agent is uniformly distributed in the formed fracture cracks and provides advantages of targeting property, good repair effect, complete repair, and no bounce for the chromium contamination, the starting and the stopping can be performed at any time, the continuous large-scale construction can be achieved, and the engineering applications can be achieved.

Description

technical field [0001] The invention belongs to the technical field of chromium pollution treatment, and particularly relates to an in-situ repair method for chromium pollution, which is suitable for the chromium pollution restoration of saturated aquifer soil and groundwater. Background technique [0002] Since the 1950s and 1960s, my country's chromium salt production industry has produced a large amount of chromium slag. According to statistics, as of 2005, the historical stockpile of chromium slag has reached more than 4 million tons, and most of them have only done simple protection. Under the leaching effect of long-term atmospheric precipitation, Cr(VI) leachate gradually migrates downward to pollute soil and groundwater. In addition, in the printing and dyeing industry, leather industry and electroplating industry, the disorderly discharge of industrial wastewater will also pollute the soil and groundwater. In the underground environment, Cr(VI) mostly exists in the...

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Problems solved by technology

[0011] In order to solve the defects of existing chromium pollution control technology, the object of the present invention is to provide a kind of in-situ repair method of chromium pollution

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