Completely bio-manipulated nitrophenol enhanced electrochemical degradation method

A nitrophenol, electrochemical technology, applied in the application field of microbial fuel cells, can solve problems such as increasing energy consumption, and achieve the effect of efficient removal

Inactive Publication Date: 2016-07-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Nitrophenol is a very representative class of toxic and refractory substances in chemical wastewater. Because the existing bioelectrochemical technology degrades such substances, chemical cathode reduction is usually used, which requires external input of electric energy to strengthen the reduction process, which increases energy consumption. ; Simultaneously the reduction product aminophenol still needs to do follow-up treatment, just can realize the complete degradation of nitrophenol

Method used

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  • Completely bio-manipulated nitrophenol enhanced electrochemical degradation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 As shown, the electrode solution (containing NaH 2 PO 4 .2H 2 O5.6g / L, Na 2 HPO 4 .12H 2 O6.07g / L, NH 4 Cl310mg / L, KCl130mg / L and trace elements: FeCl 3 4H 2 O2g / L, CoCl 2 ·6H 2 O2g / L, MnCl 2 4H 2 O0.5g / L, CuCl 2 2H 2 O0.03g / L, ZnCl 2 0.05g / L, H 3 BO 3 0.05g / L, (NH 4 ) 6 Mo 7 o 24 2H 2 O0.09g / L, Na 2 SeO 3 4H 2 O0.1g / L, NiCl2 ·6H 2 (00.05g / L, EDTA 1g / L and HCl (36%w / w) 1mL / L). Sodium acetate is used as the anode carbon source and electron donor, and is added to the anode chamber 3 to make the initial COD 1000mg / L. Add 50mg / L p-nitrophenol and 10mM sodium bicarbonate into cathode chamber 5. After 50 hours of reactor operation, the degradation rate of cathode nitrophenol reached 100%, and the generation rate of aminophenol reached 48%. Afterwards, the catholyte was transferred to the anode, and after 48 hours of reactor operation, the complete degradation of aminophenol was achieved.

Embodiment 2

[0027] Such as figure 1 As shown, the electrode solution (containing NaH 2 PO 4 .2H 2 O5.6g / L, Na 2 HPO 4 .12H 2 O6.07g / L, NH 4 Cl310mg / L, KCl130mg / L and trace elements: FeCl 3 4H 2 O2g / L, CoCl 2 ·6H 2 O2g / L, MnCl 2 4H 2 O0.5g / L, CuCl 2 2H 2 O0.03g / L, ZnCl 2 0.05g / L, H 3 BO 3 0.05g / L, (NH 4 ) 6 Mo 7 o 24 2H 2 O0.09g / L, Na 2 SeO 3 4H 2 O0.1g / L, NiCl 2 ·6H 2 (00.05g / L, EDTA 1g / L and HCl (36%w / w) 1mL / L). Sodium acetate is used as the anode carbon source and electron donor, and is added to the anode chamber 3 to make the initial COD 1000mg / L. Add 100mg / L p-nitrophenol and 10mM sodium bicarbonate into cathode chamber 5. After 50 hours of reactor operation, the degradation rate of nitrophenol at the cathode reaches 73%, and the generation rate of aminophenol reaches 29%. Afterwards, the catholyte was transferred to the anode, and after 24 hours of reactor operation, the complete degradation of aminophenol was achieved.

Embodiment 3

[0029] Such as figure 1 As shown, the electrode solution (containing NaH 2 PO 4 .2H 2 O5.6g / L, Na 2 HPO 4 .12H 2 O6.07g / L, NH 4 Cl310mg / L, KCl130mg / L and trace elements: FeCl 3 4H 2 O2g / L, CoCl 2 ·6H 2 O2g / L, MnCl 2 4H 2 O0.5g / L, CuCl 2 2H 2 O0.03g / L, ZnCl 2 0.05g / L, H 3 BO 3 0.05g / L, (NH 4 ) 6 Mo 7 o 24 2H 2 O0.09g / L, Na 2 SeO 3 4H 2 O0.1g / L, NiCl 2 ·6H 2 (00.05g / L, EDTA 1g / L and HCl (36%w / w) 1mL / L). Sodium acetate is used as the anode carbon source and electron donor, and is added to the anode chamber 3 to make the initial COD 1000mg / L. Add 25 mg / L p-nitrophenol and 10 mM sodium bicarbonate into cathode chamber 5. After 45 hours of reactor operation, the degradation rate of cathode nitrophenol reached 85%, and the generation rate of aminophenol reached 34%. The catholyte was transferred to the anode chamber 3, and after 36 hours of reactor operation, the complete degradation of aminophenol was achieved.

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Abstract

The invention discloses a completely bio-manipulated nitrophenol enhanced electrochemical degradation method. According to the invention, nitrophenol is first subjected to an anode microflora-catalyzed electrochemical reduction reaction, such that a reduced product aminophenol is produced; and a cathode microflora-catalyzed aminophenol subsequent electrochemical oxidation reaction is carried out in a battery anode chamber. With the above two-step reaction, nitrophenol substance biologically enhanced electrochemical degradation is realized. According to the invention, with the synergistic effect of cathode and anode microflora in a microbial fuel cell, with no additional electric power, nitrophenol pollutant low-cost and high-efficiency removal is realized. With the method, a novel approach of pollutant degradation under the synergistic effect of anode and cathode microflora in the microbial fuel cell is provided.

Description

technical field [0001] The invention relates to the application of a microbial fuel cell, more specifically a bioelectrochemical technology for realizing the enhanced degradation of nitrophenol under the action of complete biological control. Background technique [0002] Microbial fuel cell (microbial fuel cell) is a bioelectrochemical device that directly converts the chemical energy of fuel (organic matter) into electrical energy by using the catalysis of microorganisms (electrogenous bacteria). The microorganisms attached to the anode of the battery oxidize the organic matter and release protons and electrons; the electrons are transferred to the cathode through the external circuit, and the protons are transferred to the cathode through the proton exchange membrane; the electron acceptor of the battery cathode accepts electrons to complete the entire electricity generation process. Most of the traditional microbial fuel cell research focuses on the improvement of system...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34H01M8/16C02F101/34C02F101/38
CPCY02E60/50
Inventor 张丽彬王连军华琮歆沈锦优李健生孙秀云韩卫清刘晓东
Owner NANJING UNIV OF SCI & TECH
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