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Repair method of cadmium and lead polluted soil and electric-microorganism united permeable reaction wall repair device

A technology of lead-contaminated soil and osmotic reaction wall, applied in the restoration of polluted soil, etc., can solve the problems of unsatisfactory separation effect, slow diffusion and movement of pollutants, and unsatisfactory adsorption effect, so as to prevent secondary pollution, The effect of low cost and optimized restoration performance

Inactive Publication Date: 2016-08-24
SHANGHAI UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

The system of the electrokinetic method mainly includes the electrolyzer device and the pollutant extraction system. The pollutant extraction system is not ideal for the separation of the pollutants removed from the soil.
[0006] The permeable reactive wall (PRB) method adsorbs pollutants in the soil through PRB containing zero-valent iron, activated carbon, ecological attapulgite, etc. The adsorption effect is not ideal due to the slow diffusion and movement of pollutants in the soil

Method used

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  • Repair method of cadmium and lead polluted soil and electric-microorganism united permeable reaction wall repair device

Examples

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Effect test

Embodiment 1

[0024] In this example, see figure 1 , an electrokinetic-microbe combined permeable reaction wall repair device for cadmium and lead polluted soil, including an electrolyzer device, the electrolyzer device is composed of a reaction tank 1, two electrodes 3 and a power supply 4, the length of the reaction tank is 400mm, and the width is 100mm , the thickness of the electrode plate is 4mm, the electrode 3 is a platinum electrode plate, the power supply 4 is an AC power supply, and the two electrodes 3 are respectively connected to the power supply 4 to assemble an electrolysis system. In the reaction tank 1, a detachable The permeable reaction wall 2 is filled between the two permeable reaction walls with cadmium and lead-contaminated soil 5 to be treated by adding acidophilic thiobacterium thiooxidans, so that the untreated cadmium and lead contaminated soil 5 added with acidophilic thiobacterium thiooxidans The polluted soil 5 and the electrode 3 are separated by a permeable r...

Embodiment 2

[0035] This embodiment is basically the same as Embodiment 1, especially in that:

[0036] In this embodiment, the inner wall of the reaction tank 1 is provided with a groove, and the electrode 3 and the permeable reaction wall 2 can be installed in the groove embedded in the inner wall of the reaction tank 1 for fixing, which is convenient for the electrode 3 and the permeable reaction wall 2 Easy to install and remove for electrode exchange.

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Abstract

The invention discloses a repair method of cadmium and lead polluted soil and an electric-microorganism united permeable reaction wall repair device. The device comprises a reaction tank, an electrode, a power supply and permeable reaction walls, space between the two permeable reaction walls is filled with to-be-treated cadmium and lead polluted soil added with microorganisms, pollutants which are migrated to an electrode from the soil are adsorbed by the permeable reaction walls, and therefore, heavy metals including cadmium and lead are removed from the to-be-treated soil. The soil is repaired by uniting the microorganisms, an ecological adsorption material and electrodynamics, a plurality of methods are used, a plurality of systems are used in an integrated manner, the pollutants which are transferred to two poles are adsorbed and fixed through PRB, so that the heavy metals are removed from the soil, by use of the permeable reaction walls and an electric method, an electric pollutant extracting system is omitted, the repair method is close to reality, and the repair performance of an electrokinetic system is optimized. By the method, soil repair period is short, cost is low, efficiency of repair to the cadmium and lead polluted soil is high, and secondary pollution is not caused easily.

Description

technical field [0001] The invention relates to a repairing method and a repairing device for polluted soil, in particular to a repairing method and a repairing device combined with an electrokinetic method and a microbial method, which are applied in the technical field of soil repairing. Background technique [0002] Heavy metal pollutants in China's soil mainly come from sewage irrigation, industrial waste residues, urban garbage, industrial waste dumps and atmospheric deposition. Industrial wastewater, which accounts for a large proportion of sewage, has complex components and contains a variety of heavy metals to varying degrees, which is the main source of heavy metal pollutants in soil. In addition to cadmium and mercury, soil pollution in China is also seriously polluted by lead, chromium, arsenic and copper. [0003] Contaminated site remediation technology is the key link that determines the success or failure of contaminated site remediation. At present, althoug...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09C1/10
CPCB09C1/085B09C1/10
Inventor 何池全尚海杨学城张琦炎叶丹华何佳颖梁霞陈学萍
Owner SHANGHAI UNIV
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