Polluted soil and underground water in-situ repair system

An in-situ remediation and polluted soil technology, applied in the restoration of polluted soil, water pollutants, water/sewage multi-stage treatment, etc., can solve problems such as inability to wash out and purify, and achieve no secondary pollution and engineering costs The effect of lowering and increasing the migration speed

Inactive Publication Date: 2017-07-04
SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENG CO LTD
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Problems solved by technology

This technology is not suitable for low-permeability soils, and cannot

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  • Polluted soil and underground water in-situ repair system
  • Polluted soil and underground water in-situ repair system

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Embodiment Construction

[0021] The implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiment is not intended to limit the patent, and all similar methods and similar changes thereof that adopt the present invention should be included in the protection scope of the present invention.

[0022] like figure 1 , Shown in 2, an in-situ remediation system for contaminated soil and groundwater consists of a seepage-enhancing wall 6, a water-proof curtain 7, an enclosure wall 8, an infiltration well 9, and a reactor 10. The reactor 10 is composed of a reduction pool 1 , a detection well 2 , an oxidation pool 3 , a pumping circulation pool 4 , and a submersible pump 5 .

[0023] The water-proof curtain 7 is arranged around the polluted site, and is used to prevent the outward diffusion of the pollution plume and prevent the surfactant from diffusing out of the site. For low-permeability soil, a continuous seepage...

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Abstract

The invention relates to a polluted soil and underground water in-situ repair system. The system comprises a permeation increasing wall, a waterproof curtain, an enclosing wall and a permeation increasing well; the waterproof curtain is arranged at the periphery of a polluted field for stopping outward dispersion of polluted feathers to stop dispersion of a surface active agent out of the field; the continuous permeation increasing wall is arranged in the polluted field for reinforcing the permeability of low-permeability soil; the permeation increasing wall is directly connected with a reactor; the permeation increasing well is arranged in the polluted field; the surface active agent is injected in the permeation increasing well to urge pollutants on the surface of stratum soil to enter a water phase; under pushing of a water head in the permeation increasing well, the pollutants and polluted underground water flow to the permeation increasing wall along with underground water currents, and flow into the reactor for reduction and oxidation reactions; and purified underground water is filled back into the permeation increasing well so as to realize in-situ repair of organic polluted soil and underground water as nitrobenzene or nitro-chlorobenzene. The system dose not excavate the polluted field and extract the polluted underground water, is free of secondary pollution, and is low in engineering cost.

Description

technical field [0001] The invention relates to an in-situ repair system for organic polluted sites, in particular to an in-situ repair system for nitrobenzene and nitrochlorobenzene pollution in low-permeability soil sites. Background technique [0002] Groundwater is an important resource for human survival, and the pedosphere is the hub of the ecosystem. Due to the improper management and control of the three wastes, groundwater and soil have been polluted to varying degrees, and risk control and restoration are imperative. Currently, the remediation of contaminated sites includes two methods: in-situ remediation and ex-situ remediation. Ex-situ restoration needs to extract groundwater, excavate soil, and take protective measures in soft soil areas, which is expensive and prone to secondary pollution. It is suitable for sites with low pollution depth. In-situ restoration has the advantages of no need for earthwork excavation, less secondary pollution, and low cost; howe...

Claims

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Application Information

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IPC IPC(8): B09C1/02C02F9/04C02F101/34C02F101/38C02F101/36
Inventor 崔永高缪俊发乔华山凡后奇浦烨枫
Owner SHANGHAI GUANGLIAN ENVIRONMENTAL & GEOTECHNICAL ENG CO LTD
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