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Method for oxidizing pollutants in water through electricity/ozone/permanganate coupling

A permanganate and water oxidation technology, applied in the field of water treatment, can solve the problems of low production efficiency of active species, large dosage of oxidant, secondary pollution, etc., to increase fluid turbulence and reduce the amount of metal used , the effect of increasing productivity

Inactive Publication Date: 2021-07-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a method for coupling oxidation of pollutants in water with electricity / ozone / permanganate to solve the problem of secondary pollution and oxidant degradation in existing advanced oxidation methods for degrading organic pollutants. Problems such as large dosage, high energy consumption and low production efficiency of active species

Method used

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  • Method for oxidizing pollutants in water through electricity/ozone/permanganate coupling
  • Method for oxidizing pollutants in water through electricity/ozone/permanganate coupling
  • Method for oxidizing pollutants in water through electricity/ozone/permanganate coupling

Examples

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Effect test

Embodiment 1

[0041] Adopt the electrode reactor of above-mentioned oxidation device of the present invention to process the sewage containing 60 μ mol / L diclofenac, specifically comprise the following steps:

[0042] The sewage to be treated is injected into the reaction chamber of the cathode / anode electrode system (the anode is a platinum-plated titanium electrode, and the cathode is a platinum-plated titanium electrode). Add sodium sulfate to make the concentration 0.05 mol / L, and add potassium permanganate aqueous solution to make it The concentration of potassium permanganate was 100 μmol / L, ozone was added at an aeration rate of 60 ml / min to make the concentration 1 mg / L, and the DC power supply was started to keep the concentration of permanganate at 100 μmol / L and The applied current intensity was 20 mA, and after 20 min of treatment, the treated sewage was discharged from the water outlet.

[0043] Record the concentration change of diclofenac in the sewage to be treated in this e...

Embodiment 2

[0045] Adopt the electrode reactor of above-mentioned oxidation device of the present invention to process the sewage containing 60 μ mol / L diclofenac, specifically comprise the following steps:

[0046] The sewage to be treated is injected into the reaction chamber of the cathode / anode electrode system (the anode is a platinum-plated titanium electrode, and the cathode is a platinum-plated titanium electrode). Add sodium sulfate to make the concentration 0.05 mol / L, and add potassium permanganate aqueous solution to make it The concentration of potassium permanganate was 150 μmol / L, ozone was added at an aeration rate of 60 ml / min to make the concentration 1 mg / L, and the DC power was turned on to keep the concentration of permanganate at 150 μmol / L and The applied current intensity was 20 mA, and after 20 min of treatment, the treated sewage was discharged from the water outlet.

[0047] Record the concentration change of diclofenac in the sewage to be treated in this embodi...

Embodiment 3

[0049] Adopt the electrode reactor of above-mentioned oxidation device of the present invention to process the sewage containing 60 μ mol / L diclofenac, specifically comprise the following steps:

[0050] The sewage to be treated is injected into the reaction chamber of the cathode / anode electrode system (the anode is a platinum-plated titanium electrode, and the cathode is a platinum-plated titanium electrode). Add sodium sulfate to make the concentration 0.05 mol / L, and add potassium permanganate aqueous solution to make it The concentration of potassium permanganate was 100 μmol / L, and ozone was added at an aeration rate of 60 ml / min to make the concentration 2.5 mg / L, and the DC power supply was started to keep the concentration of permanganate at 100 μmol / L and The applied current intensity was 20 mA, and after 20 min of treatment, the treated sewage was discharged from the water outlet.

[0051] Record the concentration change of diclofenac in the sewage to be treated in ...

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Abstract

The invention discloses a method for oxidizing pollutants in water by electricity / ozone / permanganate coupling, which specifically comprises the following steps: injecting organic wastewater to be treated into a reaction chamber containing a negative / positive electrode system, then adding electrolyte into the organic wastewater to enable the concentration of the organic wastewater to be 0.02-0.1 mol / L, simultaneously turning on a direct-current stabilized power supply, controlling the current density to be 10-200 mA / cm<2>, introducing ozone and permanganate into the organic wastewater, and treating for a certain time under the action of an electric field. According to the method, coupling and combination of all processes are achieved, intermediate valence state manganese ions with the strong oxidation characteristic are excited, the number of hydroxyl free radicals is increased, therefore, the treatment effect on organic wastewater is improved, electric energy input and the consumption of ozone and permanganate are reduced, the removal efficiency is high, and simple process superposition is not needed. Compared with similar processes, the method has the advantages of higher degradation efficiency, low cost and greatly reduced energy consumption, is more suitable for large-scale application in various water treatment, and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a method for coupling electricity / ozone / permanganate to oxidize pollutants in water. Background technique [0002] With the continuous development of society, environmental problems are becoming more and more severe, and there are various types and huge quantities of pollutants entering the water body, which threatens the safety of water in the natural environment. Various organic pollutants found in water bodies have the characteristics of low content, wide distribution, great harm and difficult removal. Researches at home and abroad in recent years have shown that refractory organic pollutants in water are genotoxic, carcinogenic and teratogenic. Water pollution control has become a key issue of social focus. [0003] As an efficient oxidant, ozone is widely used in the field of water treatment, and is often used as a pretreatment or advanced treatment technology for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461C02F1/78C02F1/72C02F101/30
CPCC02F1/4672C02F2101/30C02F2305/023C02F2305/02
Inventor 赵纯蒋励铭曹知平盘其鑫宋昀茜王拓
Owner CHONGQING UNIV
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