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In situ synthesis of nano-sulfur-iron hybrid biofilm electrode and its preparation method and application

A biomembrane electrode and in-situ synthesis technology, which is applied in chemical instruments and methods, biological water/sewage treatment, special compound water treatment, etc., can solve the problem of low cathode electron transfer efficiency and achieve large-capacity adsorption and synthesis capacity Multiple and excellent properties

Active Publication Date: 2022-07-08
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Considering the shortcomings and deficiencies of the prior art, the object of the present invention is to provide a nano-sulfur-iron hybrid biofilm electrode synthesized in situ and its preparation method and application, which solves the problem of MFC cathode treatment of heavy metal-containing or refractory The problem of low cathode electron transfer efficiency in organic wastewater has broad application prospects

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  • In situ synthesis of nano-sulfur-iron hybrid biofilm electrode and its preparation method and application
  • In situ synthesis of nano-sulfur-iron hybrid biofilm electrode and its preparation method and application
  • In situ synthesis of nano-sulfur-iron hybrid biofilm electrode and its preparation method and application

Examples

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Effect test

Embodiment 1

[0054] The present embodiment illustrates the influence of the two synthesis methods on the generation amount and properties of the nano-iron sulfide powder compared with the nano-iron sulfide powder prepared by the present invention and the in-situ synthesis of the traditional MFC anode:

[0055] build as figure 1 In the dual-chamber MFC shown, a proton exchange membrane is arranged between the anode compartment and the cathode compartment, and an anode electrode and a cathode electrode are respectively arranged. The anode electrode and the cathode electrode are connected by an external circuit, and the electrode material is a carbon-based material.

[0056] (1) MFC anode uses anaerobic activated sludge (taken from Nanjing Jiangxinzhou Sewage Treatment Plant, hereinafter referred to as sludge) as the source of inoculated bacteria, the inoculation ratio is 1:2 (sludge: anolyte), and the anolyte is COD= 1000mg / L glucose simulated organic wastewater (0.31 g / LNH 4 Cl; 2.452g / LNa...

Embodiment 2

[0060] This example illustrates the effect of the nano-sulfur-iron hybrid biofilm electrode prepared by the present invention and the traditional MFC bio-cathode in the treatment of chromium-containing wastewater.

[0061] like figure 1 As shown in the construction of the biocathode MFC, the method for the domestication of the anode bioelectrode and the method for in-situ synthesis of nano-ferric sulfide at the cathode are the same as those described in Example 1, the only difference being that in step (1), the bacterial source inoculum is the lake bottom sediment, and the lake bottom sediment The volume ratio of the anolyte to the anolyte is 1:5, the anolyte is the actual organic waste water containing protein, oil and lignocellulose, the iron source used in the step (2) is ferric citrate, and the organic carbon source in the catholyte is sodium lactate and sodium pyruvate, the sulfur source is sodium sulfate, the buffer is 4-hydroxyethylpiperazine ethanesulfonic acid buffer,...

Embodiment 3

[0064] This example illustrates the effect of the nano-sulfur-iron hybrid biofilm electrode prepared by the present invention and the in-situ synthesis of nano-sulfur-iron hybrid at the MFC anode on strengthening the treatment of chromium-containing wastewater by MFC bio-cathode.

[0065] like figure 1 As shown in the construction of the biocathode MFC, the methods for the domestication of the anode bioelectrode, the in-situ synthesis of the anode and the synthesis of nano-ferric sulfide in the cathode are the same as those described in Example 1, the only difference being that the bacterial source inoculum in step (1) is electroplating. Sludge, the intermediate diaphragm of the MFC device is a bipolar membrane; in step (2), the organic carbon source in the catholyte is sodium acetate; the dechromization experiment of the cathode synthesis nano-iron sulfide experimental group is the same as that described in Example 2; The hybrid biofilm electrode obtained by in situ synthesis...

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Abstract

The invention provides an in-situ synthetic nano-sulfur-iron hybrid biofilm electrode, a preparation method and application thereof. The anode of a double-chamber MFC device is used to obtain an electrode enriched with electroactive biofilms, and then the electrode is used in the cathode in situ to obtain an electrode enriched with electroactive biofilm. Synthesis of nano-sulfur, and self-assembly to obtain nano-sulfur hybrid biofilm electrodes. The invention utilizes the electroactive biofilm to synthesize nano-ferric sulfide with strong conductivity, strong reduction, high catalytic activity and large capacity adsorption in situ to strengthen the treatment of heavy metal or organic matter-containing wastewater by MFC biological cathode, and the removal rate of Cr(VI) is improved. Compared with traditional MFC biocathode, it is greatly improved. The method provides a new technical approach for the treatment of heavy metal or organic waste water, and has important application prospects in environmental protection and resource utilization.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment and resource utilization, and in particular relates to an in-situ synthesised nano-sulfur-iron hybrid biological membrane electrode and a preparation method and application thereof. Background technique [0002] Heavy metal wastewater comes from metallurgy, mining, electroplating and other industries. Its excessive discharge and accidental leakage will cause serious harm to the environment and human body. It is estimated that there are about 72,000hm in the world. 2 19,300km of lakes and reservoirs and 19,300km of streams were severely damaged by heavy metals. In addition, pharmaceutical wastewater, daily chemical wastewater, printing and dyeing wastewater and other industrial wastewater mostly contain macromolecular organic compounds such as antibiotics, polycyclic aromatic hydrocarbons, halogenated hydrocarbons, and heterocyclic compounds. These organic pollutants and their metabolites ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/00C02F3/28C02F3/34C02F101/20C02F101/22C02F101/30C02F101/32C02F101/36
CPCC02F3/005C02F3/34C02F3/28C02F2305/06C02F2101/20C02F2101/30C02F2101/22C02F2101/36C02F2101/327Y02E60/50
Inventor 吴夏芫陈雪茹贾红华王玉琦崔衍
Owner NANJING TECH UNIV
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