Bioelectrochemical device for synchronously degrading chlorophenol in water phase by cathode and anode

Abstract

The invention discloses a bioelectrochemical device for synchronously degrading chlorophenol in a water phase by a cathode and an anode. The bioelectrochemical device comprises a device main body consisting of an anode chamber and a cathode chamber, the anode chamber is separated from the cathode chamber by a proton exchange membrane, an auxiliary electrode is arranged in the anode chamber, and a working electrode and a reference electrode are arranged in the cathode chamber; one side of the cathode chamber is provided with a cathode water outlet, the upper part of the cathode chamber is provided with a cathode charging / sampling port, the upper part of the anode chamber is provided with an anode charging / sampling port, titanium wires respectively penetrate through the auxiliary electrode and the working electrode, and the auxiliary electrode and the working electrode are connected with an external multi-channel potentiostat through the titanium wires to form a current loop. According to the device provided by the invention, a carbon felt is used as the working electrode and the auxiliary electrode, the contact area between the electrode and the water phase and the bottom mud is enlarged, a circuit is formed through titanium wire connection, the bottom mud in the Lake Taihu is inoculated in the cathode chamber and the anode chamber respectively, and the cathode potential is controlled to be constant by a constant potential rectifier, so that the degradation of chlorophenol in the water phase in the cathode chamber and the anode chamber can be realized.

Description

technical field [0001] The invention relates to the technical field of water treatment and water environment restoration, in particular to a bioelectrochemical device for synchronously degrading chlorophenols in water phase by cathode and anode. Background technique [0002] Chlorophenols (CPs for short) can be synthesized in large quantities through chlorination and hydrolysis of phenol, and are used as pesticides, herbicides or sterilization preservatives, and some high-chlorophenols and their sodium salts can also be used for the control of schistosomiasis. Depending on the number and position of chlorine atoms on the benzene ring, chlorophenols can be divided into 19 kinds of chlorophenol molecules and 5 types of isomers (monochlorophenol to pentachlorophenol), among which 2-chlorophenol, 2,4- Dichlorophenol, 2,4,6-trichlorophenol and pentachlorophenol are highly toxic. Chlorophenols at the μg / L level in the environment may be toxic to aquatic organisms. Similarly, ch...

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Problems solved by technology

In addition, the operating temperature of the currently used bioelectrochemical systems is mostly 25-30°C. Even in summer, the temperature of water in the natural environment is difficult to meet the requirements. From the perspective of in-situ restoration, it is difficult to directly apply

[0005] Related patents on chlorophenol degradation (CN111871422A, CN108636416A, CN204325050U, etc.) are mainly physical and chemical methods, relying on the preparation of specific catalytic oxidation materials or the use of large energy-consuming equipment such as ultraviolet light and ultrasound. When applied to actual water bodies, not only the cost is high, and easily lead to secondary pollution

CN101434429 uses electrochemical reduction oxidation to degrade chlorophenols, which consumes a lot of energy; CN209989139U utilizes microorganisms to degrade chlorophenols, but requires specific domestication technology and additional domestication time; in CN106734158B, micro-electric field stimulates coupling cathode anaerobic / anodic aerobic to realize bottom The removal of PCBs in mud also requires a temperature of 30-40°C, which is much higher than the general ambient temperature

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