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Method for removing organic matter under synergy of visible light photoelectric catalysis and three-dimensional electrode/electro-fenton

A three-dimensional electrode, photoelectric catalysis technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, light water/sewage treatment, etc., can solve the problem of not being able to directly use visible light synergistic treatment effect, and achieve efficient and rapid degradation of organic pollution. , the effect of increasing electrocatalytic efficiency and reducing energy consumption

Active Publication Date: 2015-06-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing combination technology is still limited to the research of photocatalysis under ultraviolet light, and cannot directly use visible light to achieve synergistic processing effect.

Method used

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  • Method for removing organic matter under synergy of visible light photoelectric catalysis and three-dimensional electrode/electro-fenton
  • Method for removing organic matter under synergy of visible light photoelectric catalysis and three-dimensional electrode/electro-fenton
  • Method for removing organic matter under synergy of visible light photoelectric catalysis and three-dimensional electrode/electro-fenton

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A Visible Light Photoelectrocatalytic Synergistic Three-Dimensional Electrode / Electro-Fenton Removal Method Using TiO 2 The mesoporous film electrode is used as the anode, and the graphite is used as the cathode. The plate spacing between the two electrodes is 4cm. There are two insulating separators inside the cathode and anode plates. The aperture of the insulating separator is 2-2.5mm. The activated carbon-loaded Fe-Ni co-doped particle electrode is filled between the insulating separators. The activated carbon particle electrode is columnar with a diameter of 3-5mm and an aspect ratio of 1:1. The filling amount of the particle electrode is 100g / L. The cathode is aerated through the aeration device, the aeration rate is controlled to 1.5L / min, the voltage between the cathode and the anode is controlled to 30V, and the 150W fluorescent lamp is an externally illuminated light source, which is irradiated at an angle of 60° with the anode plate to form visible light Phot...

Embodiment 2

[0031] Example 2. Comparison of removal effects and energy consumption of different plates and particle electrodes.

[0032] In order to comprehensively judge the advantages of the device and method of the present invention in terms of pollutant removal and energy consumption, four groups of comparative experiments were set up in the experiment, and the experimental method was the same as in Example 2. The control simulated visible light source was a 150W xenon lamp; the power supply voltage was 30V, and the aeration rate was 1.5L. / min, the dosage of ferrous iron is 0.05mmol / L, the dosage of anhydrous sodium sulfate is 5g / L, the pH of the solution is 3, the volume of the solution is 400ml, and the dosage of the particle electrode is 100g / L, and the pollutant degradation experiment is carried out. The experimental setup and the average current and energy consumption during the process are shown in Table 1.

[0033] Table 1 Photoelectrocatalytic energy consumption of different ...

Embodiment 3

[0038] A Visible Light Photoelectrocatalytic Synergistic Three-Dimensional Electrode / Electro-Fenton Method for Organic Removal, Fe-Ni Modified TiO 2 The mesoporous film electrode is the anode, graphite is the cathode, the plate spacing between the two electrodes is 6cm, and two insulating partitions are arranged inside the cathode and anode plates, and the aperture of the insulating partition is 2-2.5mm. Activated carbon supported Fe-Co co-doped TiO 2 It is filled between the insulating separators, wherein the activated carbon particle electrode is granular, with a particle diameter of 3-5mm, and the filling amount of the particle electrode is 200g / L. The cathode is aerated through the aeration device, the aeration rate is controlled to 5L / min, the voltage between the cathode and the anode is controlled to 15V, a 60W halogen tungsten lamp externally illuminated light source is applied, and the anode plate is irradiated at an angle of 60°. Visible photoelectric three-dimension...

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Abstract

The invention provides a method for removing an organic matter under synergy of visible light photoelectric catalysis and a three-dimensional electrode / electro-fenton. The method comprises the following steps of: by taking titanium-based TIO2 (titanium dioxide) or a visible light modified electrode thereof as a positive electrode and a carbonaceous material as negative electrode; arranging two isolating partitions at the inner sides of the positive electrode and the negative electrode; filling an activated carbon particle electrode or a visible light modified particle electrode thereof between the isolating partitions; aerating the negative electrode by using aerating apparatus; and meanwhile, applying direct-current voltage stabilization and visible light irradiation, thereby forming a visible light photoelectric three-dimensional electrode / electro-fenton system. According to the method, the visible light is led into a three-dimensional electrode / electro-fenton reaction system, so that the proceeding of a fenton reaction is promoted; a photoelectric catalysis action of the visible light with the positive electrode and the particle electrode is performed at the same time. Thus, the energy consumption of the three-dimensional electrode / electro-fenton reaction system is reduced; the synergistic catalytic oxidation effect is generated. As a result, the organic contamination is efficiently and rapidly degraded.

Description

technical field [0001] The invention belongs to the field of environmental protection and governance, and relates to a visible light photoelectric catalysis cooperative three-dimensional electrode / electric Fenton method for removing organic matter. Background technique [0002] The treatment of refractory organic pollutants has always been a difficult point in environmental governance. Many studies have shown that advanced oxidation technology is the most effective way to deal with refractory organic pollutants. The highly active oxidation intermediate hydroxyl radicals produced in the process have With a very high redox potential, it can react with organic pollutants without selection to achieve the purpose of pollutant degradation and even mineralization. Electrocatalytic oxidation technology and photocatalytic oxidation technology have received extensive attention in the field of advanced oxidation technology. [0003] The new three-dimensional electrode / electro-Fenton t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/30C02F1/46C02F1/72C02F101/30
Inventor 喻泽斌孙玲芳彭振波郭靖
Owner GUANGXI UNIV
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