Application of induced polyaniline loaded graphene modified electrode reactor and polycyclic aromatic hydrocarbon removal method

A technology of polycyclic aromatic hydrocarbons and modified electrodes, which is applied in chemical instruments and methods, electrochemical biological combination treatment, water pollutants, etc., can solve the problems of poor enrichment effect of electroactive microorganisms and low electron transfer efficiency, and shorten the start-up time, promote film formation, and enhance the effect of electron transfer

Active Publication Date: 2021-06-01
NANKAI UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of low electron transfer efficiency and poor enrichment effect of electroactive microorganisms and degradative microorganisms on electrodes in the existing microbial electrochemical technology, and provide a method for using modified electrodes to realize rapid enrichment of microorganisms And the efficient transfer of electrons, and then realize the efficient and rapid degradation of polycyclic aromatic hydrocarbon naphthalene in water

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  • Application of induced polyaniline loaded graphene modified electrode reactor and polycyclic aromatic hydrocarbon removal method
  • Application of induced polyaniline loaded graphene modified electrode reactor and polycyclic aromatic hydrocarbon removal method
  • Application of induced polyaniline loaded graphene modified electrode reactor and polycyclic aromatic hydrocarbon removal method

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Embodiment 1

[0021] Set up the experimental group PG+ME to degrade polycyclic aromatic hydrocarbons naphthalene in water using a microbial electrochemical system using polyaniline and graphene modified electrodes

[0022] 1) Modification of graphite rod electrodes

[0023] The electrochemical reactor is a three-electrode system with a diameter of 5 cm and a height of 5 cm including a graphite rod working electrode, a platinum counter electrode and an Ag / AgCl reference electrode. Add 100 mL of distilled water, 0.8% concentrated sulfuric acid, and 4.0 mL of aniline solution to the reactor , 1500rpm / min high-speed stirring for 10min to make the aniline evenly dispersed in the solution. Disperse the aniline evenly in the solution. Use an electrochemical workstation to apply a 0.8V potential for 100s, then add 0.03g graphene for cyclic voltammetry scanning, the scanning speed is 0.05V / s, and the scanning potential range is -0.3–1.2V, and finally the modified electrode is heated at 25°C. down ...

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Abstract

The invention discloses application of an induced polyaniline loaded graphene modified electrode reactor and a polycyclic aromatic hydrocarbon removal method. The removal effect of polycyclic aromatic hydrocarbon naphthalene in petroleum wastewater is improved by conducting polyaniline modification and graphene loading treatment on an anode of a microbial electrochemical system. The method comprises the following steps: firstly, applying a certain potential in a three-electrode system to nucleate aniline on a blank graphite rod, then adding graphene to perform cyclic voltammetry scanning on the blank graphite rod to obtain a modified electrode, culturing a degradation microbial film with electroactivity in an electrochemical reactor by using the modified electrode and using 1g / L sodium acetate as a carbon source, and using the cultured mature degradation microbial film with electroactivity to treat a solution containing naphthalene. The method has the advantages that the modified electrode realizes rapid enrichment of degradable microorganisms, further realizes efficient removal of polycyclic aromatic hydrocarbon, and provides a new method for application of a microbial electrochemical technology in the field of water pollution treatment.

Description

technical field [0001] The invention belongs to the field of microbial electrochemical technology for water treatment, and in particular relates to the application of polyaniline-loaded graphene-modified electrode reactors and a method for removing polycyclic aromatic hydrocarbons. Background technique [0002] With the massive exploitation and use of coal and petroleum in industrial production, transportation and daily life, the produced polycyclic aromatic hydrocarbons (Polycyclic aromatic hydrocarbons, PAHs) have become organic pollutants that have attracted widespread attention. Polycyclic aromatic hydrocarbons refer to organic compounds containing two or more benzene ring structures, including more than 150 substances such as naphthalene, anthracene, phenanthrene, pyrene, etc., mainly derived from coal and oil combustion, waste incineration, and motor vehicle exhaust emissions. PAHs are a class of organic pollutants with "three causes" effects. Their high stability, str...

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Application Information

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IPC IPC(8): C02F3/00C02F101/32
CPCC02F3/005C02F2101/327
Inventor 周启星李田李瑞祥张晓林王鑫
Owner NANKAI UNIV
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