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Method for removing organic pollutants in water through electrochemical cathode catalytic ozonation

A technology of organic pollutants and cathodic catalysis, applied in the field of water treatment, can solve the problems of great impact on water quality, catalyst loss, high energy consumption, etc., and achieve the effect of improved removal rate, low cost and high treatment efficiency

Active Publication Date: 2013-09-25
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of a large amount of catalyst loss, great impact on water quality, high energy consumption and difficult operation in the existing catalytic ozonation process, and provide a method for removing organic pollutants in water by electrochemical cathodic ozonation oxidation

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  • Method for removing organic pollutants in water through electrochemical cathode catalytic ozonation
  • Method for removing organic pollutants in water through electrochemical cathode catalytic ozonation
  • Method for removing organic pollutants in water through electrochemical cathode catalytic ozonation

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specific Embodiment approach 1

[0014] Specific embodiment one: This embodiment is a method for removing organic pollutants in water by electrochemical cathode catalytic ozonation oxidation. Use ozone gas aeration method or ozone saturated solution method to add ozone, and treat it for 10s~20min at the dosage of ozone at 0.1mg / mgTOC~100mg / mgTOC, and then treat at the dosage of ozone at 0.1mg / mgTOC~ 100mg / mgTOC and the cathode electrode voltage is +2.0V~-2.5V and treated for 2min~40min, that is, the water treatment of the organic matter pollution to be treated is completed.

[0015] In this embodiment, the electrochemical cathode catalytic ozone oxidation contact chamber is used to oxidize and degrade the organic matter under the background components of the water body, such as natural humic acid, which rapidly consumes ozone and generates free radicals at an ozone dosage of 0.1 mg / mgTOC to 100 mg / mgTOC, and then The process of removing organic pollutants in water is completed when the dosage of ozone is 0.1m...

specific Embodiment approach 2

[0017] Specific implementation mode two: combination figure 1 The difference between this embodiment and specific embodiment 1 is: the electrochemical cathode catalytic ozone oxidation contact chamber includes a water inlet 1, a water outlet 2, an ozone contact chamber 3, a constant voltage power supply 4, an ozone inlet device 5, Ozone gas outlet 6, anode 7 and cathode 8, water inlet 1 is set at the center of the bottom of ozone contact chamber 3, water outlet 2 is set at the upper part of the side wall of ozone contact chamber 3, and ozone gas outlet 6 is set at the center of the top of ozone contact chamber 3 The anode 7 and the cathode 8 are arranged in the ozone contact chamber 3 in the form that the anode 7 is inside and the cathode 8 is outside, the ozone inlet device 5 is arranged in the ozone contact chamber 3, the anode 7 and the cathode 8 are respectively connected with the constant voltage power supply Positive and negative connections. Others are the same as the ...

specific Embodiment approach 3

[0020] Specific implementation mode three: combination figure 2 The difference between this embodiment and specific embodiment 1 is: the electrochemical cathode catalytic ozone oxidation contact chamber includes a water inlet 1, a water outlet 2, an ozone contact chamber 3, a constant voltage power supply 4, an ozone inlet device 5, Ozone gas outlet 6, anode 7, cathode 8 and porous separator 9, water inlet 1 is set at the bottom center of ozone contact chamber 3, water outlet 2 is set at the upper part of the side wall of ozone contact chamber 3, and at the center of ozone contact chamber 3 top The ozone gas outlet 6 is set, and the anode 7 and the cathode 8 are arranged in the ozone contact chamber 3 in the form of the anode 7 on the bottom and the cathode 8 on the top, and the porous separator 9 is arranged in the ozone contact chamber 3, between the anode 7 and the cathode 8 , The ozone inlet device 5 is arranged in the ozone contact chamber 3, and the anode 7 and the cath...

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Abstract

The invention discloses a method for removing organic pollutants in water through electrochemical cathode catalytic ozonation, and relates to a method for degrading organic pollutants in water through electrochemical cathode catalytic ozonation and belonging to the field of water treatment. The method disclosed by the invention aims at solving the problems of an existing catalytic ozonation technology of high loss of catalyst, great influence on water quality, high energy consumption and difficulty in operation. The method comprises the following steps of: pouring the to-be-treated water with organic pollution into an electrochemical cathode catalytic ozonation contact chamber; adding ozone in an ozone aeration mode or ozone saturated solution mode; performing primary treatment at certain ozone dosage; treating at certain ozone dosage and cathode voltage to finish treatment of the to-be-treated water with organic pollution. Compared with independent ozone treatment, the method can be used for improving the removal rate of organic matters by 20-50%, and is mainly used for treating the water with organic pollution.

Description

technical field [0001] The invention relates to a method for electrochemical cathode catalyzing ozone oxidation to degrade organic pollutants in water, belonging to the field of water treatment. Background technique [0002] In recent years, in response to endocrine disruptors, drugs and personal care products, pesticides and organic chemical pollutants frequently detected in surface water and secondary effluent of sewage plants, the ozone oxidation process has become popular all over the world due to its ability to effectively remove these organic micro-pollutants. Wide range of applications. The removal of pollutants by the ozone oxidation process in the actual water body is divided into direct ozone oxidation and indirect oxidation of hydroxyl radicals. The second order rate constant of the reaction k>10 3 m -1 the s -1 , mainly removed by direct oxidation by ozone; but for substances that are difficult to oxidize by ozone (k<10M -1 the s -1 ) such as atrazine...

Claims

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Application Information

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IPC IPC(8): C02F1/46C02F1/78C02F101/30
Inventor 马军刘永泽郭忠凯罗从伟
Owner HARBIN INST OF TECH
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