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An in-situ remediation method for contaminated sites based on dynamic groundwater circulation

An in-situ restoration and groundwater technology, applied in the field of environmental engineering, can solve problems such as secondary pollution, large engineering volume, high cost and energy consumption

Active Publication Date: 2020-08-25
INST OF SOIL SCI CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide an in-situ remediation method for contaminated sites based on dynamic groundwater circulation to solve the problems of traditional remediation methods with large engineering volume, high cost and energy consumption and easy to cause secondary pollution

Method used

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  • An in-situ remediation method for contaminated sites based on dynamic groundwater circulation
  • An in-situ remediation method for contaminated sites based on dynamic groundwater circulation
  • An in-situ remediation method for contaminated sites based on dynamic groundwater circulation

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Embodiment

[0167] The specific implementation process of the method for in-situ remediation of contaminated sites based on dynamic groundwater circulation of the present invention will be described below through an example.

[0168] In this example, a representative chromium-contaminated site was selected to implement, operate and monitor the remediation of chromium-contaminated soil and groundwater based on dynamic groundwater circulation and in-situ microbial reduction, and evaluated the effectiveness of the method of the present invention. The remediation area of ​​the chromium-contaminated site is about 900m 2 , the vertical range of groundwater contaminated by chromium is 10-25m underground. Chromium in groundwater mainly exists in the form of Cr(VI), with a high concentration in the range of 500-2000mg / L.

[0169] The layout of well points adopts the method of pumping water in the center of the area to be repaired and injecting water around it (such as Figure 5 shown), including p...

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Abstract

The invention discloses an in-situ remediation method for polluted place based on dynamic groundwater circulation. The in-situ remediation method couples and optimizes a dynamic groundwater circulation technology and an in-situ microbial or chemical reduction / oxidation technology, pollutants are repaired, fixed, detoxified by the reduction / oxidation effect of the in-situ microbial or chemical technology, and a dynamic groundwater circulation system reduces or removes the total amount of pollution in order to improve the desorption capacity of the pollutants and repair the transmission and distribution ability of a reagent in an underground environment. The in-situ remediation method for the polluted place fully performs the respective advantages of all above technologies, makes up for thedeficiencies of the technologies, and can improve the in-situ microbial or chemical repairing efficiency, reduce the cost and the energy consumption and shorten the repairing cycle by reducing the total pollutions and carrying out microbial or chemical reduction / oxidation, fixation and detoxification.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to an in-situ restoration method for polluted sites based on dynamic groundwater circulation. Background technique [0002] As my country's industrialization and urbanization continue to accelerate, the problem of industrial site pollution is particularly prominent. The main representative pollutants include heavy metals such as hexavalent chromium, chlorinated hydrocarbons, and petroleum hydrocarbons. Therefore, carrying out the restoration of contaminated sites and protecting the ecological environment has become a major practical demand of the country. [0003] Chromium is the most common heavy metal in industrially polluted sites. It usually exists stably in soil and groundwater in two forms: hexavalent chromium (Cr[VI]) and trivalent chromium (Cr[III]). Hexavalent chromium usually exists widely in soil and groundwater in a dissolved state, has strong carcinog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/00B09C1/10B09C1/08
CPCB09C1/002B09C1/08B09C1/10B09C2101/00
Inventor 宋昕金鹏王晴陈星
Owner INST OF SOIL SCI CHINESE ACAD OF SCI
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