Device and method for removing polychlorinated biphenyls in sediment by using microbial electrolytic cell

A microbial electrolytic cell and polychlorinated biphenyl technology, which is applied in the field of soil remediation, can solve the problems that the structural stability of polychlorinated biphenyls harms human health and the natural environment, and achieves avoiding high costs, efficient dehalogenation, and pollution. repaired effect

Active Publication Date: 2017-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a typical persistent organic pollutant, the potential toxicity and structural stability of polychlorinated biphenyls have brought serious harm to human health and the natural environment, so it is urgent to find an effective method to remediate contaminated soil

Method used

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  • Device and method for removing polychlorinated biphenyls in sediment by using microbial electrolytic cell
  • Device and method for removing polychlorinated biphenyls in sediment by using microbial electrolytic cell
  • Device and method for removing polychlorinated biphenyls in sediment by using microbial electrolytic cell

Examples

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Embodiment 1

[0037] Such as figure 1 As shown, a device for removing polychlorinated biphenyls in sediment using a microbial electrolytic cell in this embodiment consists of a dual-chamber microbial electrolytic cell and an electrochemical workstation. The dual-chamber microbial electrolytic cell includes an anode chamber 1 and a cathode chamber 2, The anode chamber and the cathode chamber are separated by a cation exchange membrane 3, the anode chamber is provided with the battery anode liquid inlet 5, the anode electrode 6 and the reference electrode 7, the cathode chamber is provided with the battery cathode liquid inlet 8 and the cathode electrode 9, the anode electrode, The reference electrode and the cathode electrode are connected to the electrochemical workstation 4 through an external circuit 10, and the electrochemical workstation constantly controls the anode to maintain a potential of +0.2V.

[0038] The device of this embodiment is used to remove polychlorinated biphenyls in t...

Embodiment 2

[0042] Compared with Example 1, the device and method for removing polychlorinated biphenyls in sediment by using a microbial electrolytic cell in this example is different in that 1ml of sodium acetate with a concentration of 1M is not added regularly, and the rest are identical.

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Abstract

The invention belongs to the technical field of soil restoration and discloses a device and method for removing polychlorinated biphenyl in bottom mud through a microorganism electrolytic tank. The microorganism electrolytic tank is established, hybrid electrochemical activity bacteria and perchlorate domesticated bacteria are inoculated to an anode chamber, soil polluted by polychlorinated biphenyl is added, a nutrient solution is supplemented to the rest part, the water phase-bottom mud anode chamber is formed, anode potential is controlled to be kept constant through an electrochemical work station, growth and propagation of the hybrid electrochemical activity bacteria and the perchlorate domesticated bacteria can be promoted, dechloridation efficiency can be greatly improved, and constant bioelectric currents can be generated. By the adoption of the device and method, natural restoration and toxicity reduction can be conducted on the polluted soil, and good environmental protection benefits are achieved.

Description

technical field [0001] The invention belongs to the technical field of soil remediation, and in particular relates to a device and a method for removing polychlorinated biphenyls in sediment by using a microbial electrolytic cell. Background technique [0002] Due to its excellent physical and chemical properties such as thermodynamic stability, chemical inertness, non-flammability, and high electrical conductivity, PCBs have been widely used in industrial production. In the mid-1960s, the annual output of PCBs in the world was about Since the 1970s, my country's annual output of PCBs has been close to 10,000 tons. As a typical persistent organic pollutant, the potential toxicity and structural stability of polychlorinated biphenyls have brought serious harm to human health and the natural environment. Therefore, it is urgent to find an effective method to remediate contaminated soil. The current removal methods for PCBs include traditional degradation methods and emerging d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10
Inventor 冯春华余辉刘小平杨晓双李晨晨韦朝海
Owner SOUTH CHINA UNIV OF TECH
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