Chromium contamination in-situ remediation method

An in-situ repair and chromium pollution technology, which is applied in the field of chromium pollution treatment, achieves the effect of improving utilization rate, simple construction equipment, and conducive to redevelopment and utilization

Inactive Publication Date: 2015-08-05
BCEG ENVIRONMENTAL REMEDIATION CO LTD
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Problems solved by technology

[0011] In order to solve the defects of existing chromium pollution control technology, the obj

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  • Chromium contamination in-situ remediation method
  • Chromium contamination in-situ remediation method
  • Chromium contamination in-situ remediation method

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[0053] In order to facilitate understanding of the purpose, technical solutions and effects of the present invention, the present invention will now be further described in detail with reference to the embodiments.

[0054] This embodiment provides an in-situ repair system for chromium pollution (hereinafter referred to as the in-situ repair system), such as figure 1 and figure 2 As shown, including the chemical mixing and injection system and the drilling system, the drilling system cooperates with the chemical mixing and injection system, and the repairing agent is directly injected into the site to be repaired through the high-pressure equipment (grouting pump 2 of the chemical mixing and injection system). That is, in the saturated layer, the repair agent migrates and diffuses, reacts with Cr(VI), reduces and stabilizes Cr(VI), eliminates its health risk, and achieves the purpose of repair. The saturated layer is a saturated aquifer soil or groundwater pollution area.

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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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Application Information

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IPC IPC(8): B09C1/08C02F1/62
Inventor 郭丽莉李书鹏张岳许超谭勇壁牛永超
Owner BCEG ENVIRONMENTAL REMEDIATION CO LTD
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