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Electric-microbial combined remediation method for heavy metal contaminated soil

A technology of contaminated soil and joint remediation, applied in the field of soil remediation

Inactive Publication Date: 2015-07-29
SHANGHAI UNIV
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Problems solved by technology

Therefore, this also makes it possible to use microorganisms to treat heavy metal-contaminated soil

Method used

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  • Electric-microbial combined remediation method for heavy metal contaminated soil

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Embodiment Construction

[0012] In this embodiment, a composite electrokinetic-microbial remediation device is used, see the attached figure 1 It includes a DC power supply, a graphite electrode plate and a plexiglass reaction tank; the length of the reaction tank is 200 mm, the width is 90 mm, and the thickness of the electrode plate is 4 mm. 1.5 kg of soil samples are spread in the electrolytic reaction tank with a height of about 50 mm. The soil samples of the middle electrolytic cell were artificially polluted soil, in which cadmium (Cd 2+ ) The pollutant concentration is 100 mg / kg. Connect the DC power supply to the electrode plate. In this example, samples were taken from the factory land in the Nanda area of ​​Baoshan, Shanghai, and it was found that the cadmium metal content in the contaminated soil samples was the highest, reaching 100 mg / kg, and cadmium was selected as the target heavy metal. Screening microorganisms from the soil, Acidophilus Thiobacillus thiooxidans is the dominant strai...

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Abstract

The invention relates to an electric-microbial combined remediation method and an electric-microbial combined remediation device for heavy metal contaminated soil. The electric-microbial combined remediation device comprises a pretreatment system, a direct current stabilized power supply, an electric electrode and an aftertreatment system; a cathode and anode electrolytic tank is arranged on the electric-microbial combined remediation device, the electrode is directly inserted into soil, so that the technology is relatively close to reality, and the direct current stabilized power supply is directly connected with a graphite plate in the electrode; an electric pretreatment system comprises indigenous microorganism cultivation and acclimation. The electric-microbial soil remediation technology can effectively and quickly solve the problems that the conventional soil remediation technology is high in processing cost and can easily cause secondary pollution.

Description

technical field [0001] The invention relates to an electrokinetic-microbe combined treatment technology and a device for heavy metal polluted soil, belonging to the technical field of soil remediation. Background technique [0002] In the process of urbanization and the improvement of urban living environment in my country, the industrial polluted sites left in urban areas due to the upgrading of industrial structure, adjustment of urban layout, and the relocation of enterprises such as pollution disturbing residents have seriously threatened the surrounding environment and the health of residents. According to statistics, from 2001 to 2008, the number of closed and transferred enterprises in my country increased rapidly from 6,611 to 22,488, and the total number reached more than 100,000. In 2008, the number of closed and transferred enterprises in Beijing, Tianjin, Shanghai, and Chongqing accounted for 0.68%, 0.50%, 2.78%, and 2.66% of the total number of industrial enterp...

Claims

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Application Information

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IPC IPC(8): B09C1/08B09C1/10
Inventor 何池全杨学城孙潇凯何佳颖尚海龙梦玲梁霞陈雪萍
Owner SHANGHAI UNIV
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