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Method for remediating contaminated underground water in situ on basis of persulfate thermal activation technique

A persulfate and in-situ remediation technology, which is applied in chemical instruments and methods, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as low efficiency and large investment in groundwater remediation technology, and achieve engineering volume Small, well-repaired, easy-to-implement effects

Inactive Publication Date: 2011-11-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of large investment and low efficiency of the existing groundwater restoration technology, and provides a method for in-situ restoration of polluted groundwater based on persulfate thermal activation technology

Method used

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  • Method for remediating contaminated underground water in situ on basis of persulfate thermal activation technique

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specific Embodiment approach 1

[0010] Specific embodiment one: In this embodiment, a method for in-situ repairing of polluted groundwater based on persulfate thermal activation technology is carried out according to the following steps: 1. First, add persulfate or persulfate composite oxidant into water, and then use The anti-corrosion pump is pumped into the underground water body to be repaired, so that the mass concentration of persulfate in the water body to be repaired is 0.1-250 mg / L, and the mass concentration of persulfate composite oxidant is 0.1-250 mg / L; After mixing persulfate or persulfate composite oxidant with groundwater for 10-24 hours, pump high-pressure steam into the underground water body to be repaired. The mass concentration of high-pressure steam pumped into the water body to be repaired is 0.3-200g / L. After 1 to 2 days, the restoration of the contaminated groundwater is completed.

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass concentration of persulfate in the water body to be repaired in Step 1 is 10-200 mg / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass concentration of persulfate in the water body to be repaired in Step 1 is 50-150 mg / L. Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for remediating contaminated underground water in situ on basis of a persulfate thermal activation technique, which relates to a method for remediating contaminated underground water. The method is used to solve the problems of large investment and low efficiency of the conventional underground water remediation technique. The method comprises: adding persulfate or persulfate compound oxidizer into water, and pumping the solution by an anticorrosion pump into underground water to be remediated; and 2, after the persulfate or persulfate compound oxidizer is mixed with the underground water for 10 to 24 hours, pumping high-pressure vapor into the underground water to be remediated, and remediating the contaminated underground water after 1 to 2 days. When the method disclosed by the invention is used, the work amount is small, the technical investment is small, new toxic matters are not introduced into water, the implementation is easy, and the removal rate of the contaminants reaches 85 to 95 percent. The method is used in the field of underground contaminated water treatment.

Description

technical field [0001] The present invention relates to a method of remediating contaminated groundwater. Background technique [0002] In recent years, due to continuous industrial and agricultural pollution, a large number of refractory toxic and harmful pollutants have entered the water body, causing the deterioration of water quality and seriously affecting the sustainable development of the environment and society, especially the pollutants entering the groundwater , It has not been effectively degraded in several years or even hundreds of years, which has buried a deep hidden danger for human development and utilization of groundwater. [0003] Conventional groundwater remediation technology generally involves pumping groundwater to the surface and then treating it with conventional methods for surface water treatment. This method not only consumes a lot of energy and takes up a lot of space, but also requires a lot of supporting auxiliary water treatment facilities, ...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F1/72
Inventor 马军杨友强高国瀛胡兴霞赵竟博杨晶晶
Owner HARBIN INST OF TECH
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