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A method and device for strengthening electro-Fenton water treatment

A technology of water treatment and Fenton reaction, which is applied in the direction of oxidized water/sewage treatment, special compound water treatment, water/sewage treatment, etc., to achieve the effects of good stability, improved degradation efficiency, and low dosage

Active Publication Date: 2020-07-10
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above deficiencies or improvement needs of the prior art, the present invention provides a method and device for intensifying electro-Fenton water treatment, the purpose of which is to add oxalate reagent packs into the electrochemical reduction tank of the electro-Fenton reaction device , while setting the cathode as Ti@TiO 2 The cathode, using the interaction of the two, realizes the Fe 3+ fast electroreduction, continuously and rapidly replenishing the Fe consumed by the Fenton reaction 2+ , so as to improve the efficiency of the electroreduction Fenton system to degrade pollutants, thereby solving the problem of the existing technology Fe 3+ The electrochemical reduction rate of Fe is much lower than that of Fe 2+ Technical problem with iron slime accumulation due to Fenton reaction consumption rate

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  • A method and device for strengthening electro-Fenton water treatment
  • A method and device for strengthening electro-Fenton water treatment
  • A method and device for strengthening electro-Fenton water treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0058] Degradation of four typical organic pollutants by adding different oxalate concentrations

[0059] use figure 1 For the shown setup, 0.5 mM Fe was added to the cathode reaction solution 3+ and H 2 o 2 , compared to the sulfamethoxazole (SMX) of 20mg / L when the concentration of oxalate was 0mM, 0.15mM, 0.3mM, 0.5mM and 0.75mM in the medicament bag with oxalate added as the main component, The degradation enhancement of 4-DCP, phenol (Ph) and benzoic acid (BA), the multiples of the enhancement of the degradation rate of pollutants by the concentration of different drug packages are as follows Figure 4 shown.

[0060] Result analysis: From the results of Example 1, it can be seen that the use of anodized pretreated Ti@TiO 2 The electrode, after adding a low concentration of oxalate as the main component of the agent package, can effectively enhance the degradation rate of typical organic pollutants by electroreduction Fenton, and the oxalate and Fe 3+ The strengthen...

Embodiment 2

[0062] Ti@TiO 2 Electrode surface oxide layer on Fe 3+ Intensification of electroreduction

[0063] use figure 1 The shown device, using Ti@TiO pretreated by anodization for different times 2 Electrode, comparing different TiO2 when adding a low concentration of oxalate-based pharmaceutical package 2 Oxide layer thickness vs. Fe 3+ Influenced by the electrochemical reduction, the results are as follows Figure 5 shown.

[0064] Result analysis: From the results of Example 2, it can be seen that when a low-concentration pharmaceutical package is added, the uniform TiO on the Ti sheet electrode 2 layer can significantly accelerate the Fe 3+ Electrochemical reduction of Ti@TiO after anodic oxidation 2 Compared with ordinary commercial Ti sheet electrodes, the electrode can reduce Fe per unit power consumption 2+ The amount increased by 2.3 to 2.8 times.

Embodiment 3

[0066] use figure 2 The shown device continuously pumps the actual printing and dyeing wastewater whose initial pH is adjusted to 3.5 with concentrated sulfuric acid, and continuously pumps 1.0mM FeSO into (5) Fenton reaction tank 4 and 3.0mM H 2 o 2 , (6) The reflux ratio of the electrochemical reduction tank is 200%. (1) When the electrochemical workstation is not powered on, the simulation is the traditional Fenton technology. When the terminal voltage of (1) the electrochemical workstation is 0.5V, the simulation is the ordinary The electro-Fenton technology of electro-reduction, when continuously pumping an appropriate concentration of oxalate-based reagent packs into the electrochemical reduction tank (6), simulates the enhanced electro-Fenton water treatment process. The effects of the three different technologies on printing and dyeing wastewater COD removal rate and Fe in effluent 2+ The proportion of Figure 6 shown.

[0067] At the same time, under the conditi...

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Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a method and a device for strengthening electro-Fenton water treatment. According to the invention, a chemical bag containing oxalate is added into an electrochemical reduction tank of an electro-Fenton reaction device, and Ti@TiO2 is used as a negative electrode; the electrochemical reduction tank contains wastewater; oxalate in the chemical bag is complexed with Fe<3+> generated by a Fenton reaction to generate an iron complex; and through the interaction between the iron complex and a Ti@TiO2 negative electrode material, the transmission of electrons is promoted, the reduction rate of Fe<3+> is increased, Fe<2+> consumed by the Fenton reaction is continuously supplemented, the degradation efficiency of the Fenton reaction is improved, and the iron sludge yield of a Fenton reaction system is reduced.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and more specifically relates to a method and device for strengthening electro-Fenton water treatment. Background technique [0002] Advanced oxidation technology has been favored in the treatment of refractory wastewater, especially based on Fe 2+ with H 2 o 2 The Fenton’s reagent method of chain reaction to generate OH is currently the most commonly used AOPs technology. Although this method has the characteristics of simplicity, easy operation and high efficiency, the conventional Fenton’s reagent method needs to add a large amount of Fe in the initial stage of the reaction. 2+ with H 2 o 2 , to ensure sufficient OH, a large amount of Fe produced by the Fenton reaction 3+ Iron slime brings troubles for further processing. So a variety of improved Fenton technology came into being, and in the electric Fenton technology, Fe 2+ and H 2 o 2 It can be produced in situ through elec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/461C02F1/72C02F101/30
CPCC02F1/46109C02F1/4676C02F1/722C02F2001/46133C02F2101/30C02F2201/46135C02F2209/06C02F2209/08C02F2301/046C02F2303/06C02F2305/026
Inventor 周涛吴晓晖刘宇孛王晨毛娟王嘉
Owner HUAZHONG UNIV OF SCI & TECH
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