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Method for producing graphene from biological cathode through reduction and removing sulfate

A biocathode and sulfate technology, applied in the field of bioelectrochemical systems, can solve problems such as exchange membrane blockage, high energy consumption, and complicated processes

Inactive Publication Date: 2018-10-16
SUN YAT SEN UNIV
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Problems solved by technology

The method of using high temperature or electrochemical method to prepare graphene has the characteristics of high energy consumption and complicated process
Usually, there are some metal ions such as Cu, Ni, Zn, etc. in the wastewater rich in sulfate, and the sulfide generated in the sulfate reduction process and heavy metals form metal sulfide precipitation, which will easily cause the blockage and pollution of the exchange membrane, and the technical cost higher

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  • Method for producing graphene from biological cathode through reduction and removing sulfate
  • Method for producing graphene from biological cathode through reduction and removing sulfate
  • Method for producing graphene from biological cathode through reduction and removing sulfate

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Embodiment Construction

[0016] Bioelectrochemical system reduction production of graphene synergistically removes sulfate wastewater device uses 1g / L anhydrous sodium acetate as anolyte, the specific composition is (in 1L deionized water): 1g CH 3 COONa, 10.35g Na 2 HPO 4 12H 2 O, 3.31gNaH 2 PO 4 2H 2 O, 0.31g NH 4 Cl, 0.13g KCl, 12.5mL trace element solution and 12.5mL vitamin solution. The electrogenic bacteria in the anode chamber oxidize the organic matter to release electrons and protons, the electrons are transferred to the cathode through the external circuit, and the protons are transferred to the cathode chamber through the cation exchange membrane. Sulfate-reducing bacteria on the autotrophic cathode 2 or NaHCO 3 As an inorganic carbon source, graphene oxide, As an electron acceptor for reduction reaction, the whole process does not need to add an organic electron donor, and the artificially prepared sulfate wastewater is (in 1L deionized water): 720mg / L Na 2 SO 4 , inorganic sa...

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Abstract

The invention relates to a method for producing graphene from a biological cathode through reduction and removing sulfate and belongs to the field of bioelectrochemistry systems. The system is characterized in that a microorganism electrolytic tank in the field of energy production and wastewater treatment is applied to in-situ production of graphene and synergetic treatment on sulfate wastewaterfor a first time, and by domesticating a certain microorganism amount of sulfate reducting bacteria, and inoculating the sulfate reducting bacteria with a cathode chamber, a stable autotrophic biological membrane is formed on a cathode electrode. Sulfate wastewater of a certain concentration is manually prepared, in addition, graphene oxide of a certain concentration is added and is ultrasonicallydispersed into the sulfate wastewater, and then a cathode liquid is prepared. A reasonable hydraulic retention time is determined, a substrate is replaced when an operation cycle is completed, graphene in an effluent of the cathode chamber is effectively collected, and in addition, a certain amount of sulfate can be removed.

Description

technical field [0001] The invention belongs to the field of bioelectrochemical systems, and the system is characterized in that for the first time, a microbial electrolytic cell concentrated in the field of production capacity and wastewater treatment is applied to the in-situ production of graphene to cooperate with the treatment of sulfate wastewater, by domesticating a certain amount of sulfate Reducing bacteria are then inoculated into the cathode compartment to form a stable autotrophic biofilm on the electrodes. A certain concentration of sulfate wastewater is manually prepared. In addition, a certain concentration of graphene oxide is added and dispersed into the sulfate wastewater by ultrasound, that is, catholyte. Determine a reasonable hydraulic retention time, and replace the substrate at the end of the cycle to effectively collect graphene in the effluent of the cathode chamber and achieve a certain amount of sulfate removal. Background technique [0002] Due t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C25B1/00C25B5/00C02F101/10
CPCC02F3/005C02F2101/101C25B1/00C25B5/00
Inventor 骆海萍胡佳萍刘广立张仁铎曾翠平卢耀斌
Owner SUN YAT SEN UNIV
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