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Method for in-situ reduction restoration of polluted groundwater

A groundwater and reduction method technology, which is applied in the treatment of polluted groundwater/leachate, reduced water/sewage treatment, chemical instruments and methods, etc. efficient effect

Active Publication Date: 2017-07-21
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most technologies are still limited to the application in the field of traditional water treatment, and do not involve the field of groundwater pollution remediation

Method used

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  • Method for in-situ reduction restoration of polluted groundwater
  • Method for in-situ reduction restoration of polluted groundwater
  • Method for in-situ reduction restoration of polluted groundwater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Restoration effect of Cr(VI) in reaction zone during simulated restoration of uniform sandy aquifer

[0029] In the groundwater polluted area, according to the location of the pollutant leakage point and the direction of the groundwater flow, set the location and quantity of monitoring points, and conduct sampling analysis in the polluted area. A total of 66 sampling ports (a total of 6 rows and 11 columns) are set up, and the spacing between the sampling ports is 2m. Each sampling port is named, for example, the sampling ports in the first row and the third column are named as sampling ports 1-3, and the The sampling port in the fifth column is named sampling port 2-5, and the names of other sampling ports are deduced by analogy. Drill two reagent injection wells side by side between the sampling ports in the third and fourth columns. The inner diameter of the injection wells is 15cm, the spacing is 5m, and there are small holes evenly distributed around the body; samp...

Embodiment 2

[0038] Remediation effect of TCE in reaction zone during simulated remediation process of uniform sandy aquifer

[0039] The difference from Example 1 is that the conditions of the site medium are the same, but the target pollutant is trichlorethylene (TCE).

[0040] The remediation effect of this new in-situ advanced reduction technology was investigated when the groundwater was polluted by TCE.

[0041] The experimental method and the testing method of each index are the same as in Example 1. In addition, TCE was determined by n-hexane extraction and enrichment method. Gas chromatography-mass spectrometry was used to select the ion scanning mode, and the TCE content was quantitatively analyzed by the external standard method, and the chromatographic column was HP-5MS. The specific steps are as follows: take out 5ml of liquid from the 20ml reaction system, add 5ml of extractant n-hexane, use a vortex shaker for liquid-liquid extraction, transfer the upper extract, dilute an...

Embodiment 3

[0044] Restoration effect of Cr(VI) and TCE in reaction zone during simulated restoration of uniform sandy aquifer

[0045] The difference from Example 1 is that the condition of the site medium is the same, but the target pollutants are Cr(VI) and TCE.

[0046] The remediation effect of this new in-situ advanced reduction technology was investigated when the groundwater was simultaneously polluted by Cr(VI) and TCE.

[0047] The experimental method and the testing method of each index are the same as in Example 1. In addition, TCE was determined by n-hexane extraction and enrichment method. Gas chromatography-mass spectrometry was used to select the ion scanning mode, and the TCE content was quantitatively analyzed by the external standard method, and the chromatographic column was HP-5MS. The specific steps are as follows: take out 5ml of liquid from the 20ml reaction system, add 5ml of extractant n-hexane, use a vortex shaker for liquid-liquid extraction, transfer the upp...

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Abstract

The invention relates to a method for in-situ reduction restoration of polluted groundwater. In a groundwater pollution zone, by injecting formate and persulfate into an underground environment through two injection wells and performing thermal activation on the persulfate and the formate, carbon dioxide ion free radicals with high reducibility are prepared to reduce heavy metals and chlorinated organic pollutants and remove target polluted components, so as to achieve an aim of restoration. According to the method provided by the invention, activation is realized by heating without externally adding transition metals, and the generation of free radicals and the removal of pollutants can be achieved under the condition that chemical conditions including a pH value, a dissolved oxygen content and the like of the groundwater are not adjusted. A carbon dioxide free radical is a high-reducibility free radical, reacts quickly and efficiently with the pollutants, and can be widely applied to restoration of underground polluted environments.

Description

technical field [0001] The invention belongs to the technical field of groundwater pollution restoration, and relates to a groundwater pollution restoration method, in particular to a method for in-situ reduction restoration of polluted groundwater, which uses the strong reducibility of carbon dioxide free radicals to restore groundwater contaminated by heavy metals and organic matter. bit fixes. Background technique [0002] In the process of the development of human civilization, industrial production and mining activities have produced a large amount of solid waste and polluted wastewater, which will cause serious pollution to soil and groundwater if disposed of randomly or improperly, and then threaten people's health. [0003] With the rapid development of industry and agriculture, the problem of heavy metal and organic pollution in groundwater has become increasingly prominent, and its control and treatment have gradually become the new focus of environmental protectio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/70C02F103/06
CPCC02F1/70C02F2103/06C02F2209/003
Inventor 周睿孙荷任何军侯志敏张立剑
Owner JILIN UNIV
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