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An induction electrode and a method for degrading pollutants in an electro-magnetic coupling field

An induction electrode, magnetic coupling technology, applied in chemical instruments and methods, water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of slow dissolution rate and low electrode activity, achieve fast dissolution rate, and solve recycling and utilization. , the effect of mild reaction process

Active Publication Date: 2021-03-05
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] For the low activity of traditional iron induction electrodes, Fe 2+ For the defect of slow dissolution rate, the present invention has developed an induction electrode and a method for degrading pollutants in an electric-magnetic coupling field, using the induction electrode to efficiently precipitate Fe in situ under the action of an electric-magnetic coupling field 2+ , react with hydrogen peroxide generated in situ at the cathode to generate hydroxyl radicals with strong oxidizing properties, so as to achieve the purpose of efficiently and rapidly degrading pollutants in wastewater

Method used

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Embodiment 1

[0043] In the water treatment method of this embodiment, the anode uses a DSA electrode, and the cathode uses a carbon black-modified carbon felt electrode, wherein the catalytic layer of the cathode (the side loaded with carbon black) is in contact with the solution, and the other side is in direct contact with the air. Relying on the active diffusion of air to the cathode catalytic layer, the hydrogen peroxide can be efficiently produced in situ without the need for additional aeration devices. The arrangement of cathode and anode is as follows: figure 1 As shown, the induction electrode is placed between the cathode and the anode, and the active component is pure micron-sized zero-valent iron powder. The active component is evenly adsorbed on the graphite plate under the action of the magnetic block, and the active component is facing the cathode. .

[0044] Reaction conditions: solution volume: 130mL, sodium sulfate concentration: 0.05mol / L, chlorobenzene concentration: 0...

Embodiment 2

[0048] The sensing electrode of this embodiment is used in wastewater treatment, and the specific process of wastewater treatment is the same as in Example 1. Reaction conditions: solution volume: 130ml, sodium sulfate concentration: 0.05mol / L, chlorobenzene concentration: 0.1mmol / L, anode: DSA , Cathode: carbon black modified carbon felt, initial pH 7.0, zero-valent iron sensing electrode.

[0049] Figure 3(a) shows that when the current increases from 10mA to 30mA, the degradation rate of chlorobenzene increases with the increase of current, and when the current increases from 30mA to 40mA, the degradation performance of chlorobenzene decreases . This is because when the current is lower than 30mA, as the current increases, the production of hydrogen peroxide and the amount of iron precipitation increase (Figure 3(b)), more hydroxyl radicals are produced in the system, and the degradation rate of chlorobenzene get promoted. When the current was further increased, the hydro...

Embodiment 3

[0051] Solution volume: 130mL, sodium sulfate concentration: 0.05mol / L, chlorobenzene concentration: 0.1mmol / L, current 30mA, cathode: carbon black modified carbon felt, initial pH 7.0. Peroxygen flocculation system: The zero-valent iron sensing electrode is the anode, which is connected to the power supply. Induction electric Fenton system: the anode is a DSA electrode, and the zero-valent iron induction electrode is placed between the cathode and anode, and the power is not connected. Use zero-valent iron sensing electrodes in different reaction systems for water treatment.

[0052] Figure 4(a) shows that the degradation rate of p-chlorobenzene in the induction electro-Fenton system is slightly higher than that in the peroxygen flocculation system. When the initial pH of the solution was 7.0, the pH of the solution dropped to 4.2 after the reaction in the induction electro-Fenton system, while in the peroxygen flocculation system, the pH of the solution gradually rose to 7....

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Abstract

The invention discloses an induction electrode and a method for degrading pollutants in an electro-magnetic coupling field. The induction electrode includes: a substrate, made of a material that is conductive and stable in an electric-magnetic coupling field; a magnetic material, located on one side of the substrate; attached to the substrate surface. In the electro-Fenton system where the anode is a DSA electrode and the cathode is a carbon felt electrode, the zero-valent iron sensing electrode is placed between the cathode and the anode, where the active component (zero-valent iron) faces the carbon felt cathode. During the electrolysis process, the cathode will efficiently generate hydrogen peroxide in situ, and under the action of the electro-magnetic coupling field, the zero-valent iron sensing electrode will precipitate Fe in situ 2+ , and then react with hydrogen peroxide to generate hydroxyl radicals with strong oxidative properties, thereby efficiently degrading pollutants in wastewater, and solving the problem of low activity of traditional iron plate induction electrodes, Fe 2+ The problem of slow dissolution has broad application prospects.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an induction electrode and a method for degrading pollutants in an electro-magnetic coupling field. Background technique [0002] At present, municipal sewage treatment facilities based on biological and physical treatment methods play an important role in the field of domestic sewage and some industrial wastewater treatment in our country. However, with the development of my country's economy and society, the types of industrial wastewater are increasing and the components are becoming more and more complex. It is difficult for traditional sewage treatment technologies to meet the treatment requirements of these industrial wastewater (such as chemical wastewater, pesticide wastewater, etc.), and cannot achieve their discharge standards. , which will pose a serious threat to the ecological environment and human life and health. Therefore, the exploration of new and high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/467C02F1/72
CPCC02F1/46104C02F1/4672C02F1/722C02F1/725C02F2201/46105
Inventor 任更波贾志威马小东张新一
Owner HEBEI UNIV OF TECH
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