Repair system for strengthening oxidation-reduction reaction through in-situ hydraulic driving

A hydraulic drive and restoration system technology, applied in the field of soil restoration, can solve the problems of large amount of treatment process and poor restoration effect of water and soil integration, and achieve good treatment effect, efficient integrated restoration, and low economic cost

Active Publication Date: 2022-07-22
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an in-situ hydraulically driven restoration system for strengthening oxidation-reduction reactions, so as to solve the problems existing

Method used

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  • Repair system for strengthening oxidation-reduction reaction through in-situ hydraulic driving
  • Repair system for strengthening oxidation-reduction reaction through in-situ hydraulic driving

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Experimental program
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Effect test

Embodiment 1

[0041] like figure 1 For ease of understanding, the experimental area of ​​the series reaction grid system is regarded as a seepage box 2 in a square area. A transparent cover 1 is set on the top of the seepage box 2 and is tightened with bolts 11 to prevent the inside of the seepage box 2 from being polluted by the environment. ; The upper surface of the box cover 1 is provided with a first injection port, a second injection port and a third injection port, which correspond to the positions of the first injection well 3, the second injection well 5 and the extraction well 7.

[0042] Further, the present invention includes a seepage tank 2 filled with polluted soil, a hydraulically driven circulation system for promoting the migration of pollutants in the soil, and a series reaction grid system composed of permeable reaction columns. The hydraulic drive circulation system includes a first injection well 3 , an extraction well 7 , a peristaltic pump 8 and a liquid storage tank...

Embodiment 2

[0053] Remediation of soil and simulated groundwater contaminated with naphthalenesulfonic acid, 1,5-naphthalenedisulfonic acid, and 1,3,6-naphthalenetrisulfonic acid under laboratory conditions. A plexiglass container with a length, width and height of 300:150:150 (mm) was filled with 1:1 clay and quartz sand to simulate the soil layer and groundwater with benzenesulfonic acid pollutants dissolved below the surface. The soil reduction and purification unit 4 and the soil oxidation and purification unit 6 are perforated plexiglass tubes pre-buried in the soil layer and filled with biochar-loaded nano-zero valent iron. The pump 8 and the liquid storage tank 9 are connected, and the persulfate injection well 5 is connected with the oxidation tank and the peristaltic pump 8 . The seepage box cover 1 seals the experimental container through bolts, and a sampling port for simulating groundwater is reserved on the side of the experimental container.

[0054] The specific repair ste...

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Abstract

The invention discloses an in-situ hydraulic drive enhanced oxidation-reduction reaction remediation system which is used for remediating polluted soil and underground water and comprises a hydraulic drive circulating system and a reaction grid system. The hydraulic driving circulating system comprises a driving assembly and a liquid storage tank; the reaction grid system is connected with the liquid storage tank through the driving assembly; the reaction grid system is arranged underground until reaching a soil saturation zone; the reaction grid system comprises a soil reduction purification unit and a soil oxidation purification unit which are connected in series. The device aims at a site polluted by a water-soluble dye, efficient soil and underground water integrated remediation can be achieved, and a satisfactory pollutant removal effect can be achieved within a short time through hydraulic driving. When the repairing system operates, normal production and life on the ground are not affected, and high utilization of resources is achieved.

Description

technical field [0001] The invention relates to the technical field of soil remediation, in particular to an in-situ hydraulic-driven remediation system for strengthening redox reactions. Background technique [0002] Research shows that the acceleration of new urbanization in my country and the change of land use have a serious impact on the soil and water environment. A large number of industrial waste sites appear, and pollution site incidents occur from time to time, threatening the living environment and healthy life of surrounding residents. The pollutants in industrial polluted sites mainly include heavy metals, petroleum hydrocarbons, volatile organic pollutants, semi-volatile organic pollutants, etc., which cause serious pollution to the soil and groundwater of industrial sites and surrounding areas. The groundwater of the polluted site contains many water-soluble and refractory organic pollutants, such as naphthalene sulfonate and azide dyes, which have strong carc...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08
CPCB09C1/08B09C1/002B09C2101/00
Inventor 廖译嘉王琪伍程程张亚玲谢鹏林匡飞周长瑞白雪袁开
Owner EAST CHINA UNIV OF SCI & TECH
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