Method for degrading phenol by nitrogen-boron co-doped carbon-based microbial fuel cell cathode

Abstract

The nitrogen-boron co-doped carbon-based catalyst (BNBC) is prepared by utilizing a two-step synthesis method and taking shaddock peel as a carbon source, melamine as a nitrogen source, boric acid as a boron source and CoCl2. 6H2O as a cocatalyst, and the nitrogen-boron co-doped carbon-based catalyst is used as a cathode catalyst of a microbial fuel cell (MFC). Through structural characterization and performance testing, the electricity generation performance of the BNBC cathode MFC and the degradation effect of the BNBC cathode MFC on phenol are obtained. The process comprises the following steps: 1, preparing a BNBC cathode catalyst; 2, preparing a BNBC cathode electrode; 3, assembling a single-chamber MFC reactor; and 4, operation of the MFC reactor and degradation of phenol. Results show that the BNBC cathode MFC has stable power output, and when the initial concentration of phenol is 200mg / L, the degradation rate of phenol wastewater can reach 98.2%, which indicates that the BNBC cathode MFC has an excellent degradation effect on phenol in wastewater while effectively generating electricity. The method is simple in preparation process, low in cost and environment-friendly, has very good degradation efficiency on phenol, and can effectively reduce energy consumption in the phenol wastewater treatment process.

Description

technical field [0001] The invention belongs to the technical field of microbial electrochemistry and wastewater treatment, and in particular relates to a method for degrading phenol at the cathode of a nitrogen-boron co-doped carbon-based microbial fuel cell. Background technique [0002] As the first of the four major pollution sources of water bodies, organic pollutants have been widely valued, among which phenolic substances are a class of organic pollutants with high toxicity. As a typical phenolic refractory substance, phenol is widely used in the production of synthetic resins, spices, dyes, oil refining, pesticides, and pharmaceuticals. When the human body ingests a certain amount of phenol, it will cause acute poisoning, and even inhibit the central nervous system or damage the liver and kidney functions. When the phenol content in water is greater than 5mg / L, aquatic organisms will be poisoned and die. At present, the treatment technologies of phenol wastewater m...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that a large amount of phenol in water remains in the environment and pose a serious threat to the ecological environment and human health, and to provide a nitrogen-boron co-doped carbon-based microbial fuel cell cathode with high catalytic activity to degrade The method of phenol in water

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