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Activated carbon fiber-ozone oxidizing cooperated degradation method for the subaqueous phenolic compound

A technology of activated carbon fiber and phenolic compounds, applied in chemical instruments and methods, oxidized water/sewage treatment, water pollutants, etc., can solve the problem of reduced degradation performance of activated carbon, complex process conditions and equipment, and poor pertinence of special water sources, etc. problem, achieve the effect of increasing ozone utilization rate, improving ozonation efficiency, and easy operation

Inactive Publication Date: 2009-07-29
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still the following problems in practical application: First, the activated carbon used is ordinary activated carbon, and the degradation performance of activated carbon will continue to decrease with the prolongation of the service life during use; second, the water quality to be treated must be pre-treated or The water quality contains trace amounts of organic pollutants; the third is the integration of two unit structures in the process, which makes the process conditions and equipment complex and increases the operating cost; the fourth is targeted at special water sources (such as water quality containing higher phenolic compounds) Not strong, the processing effect is not ideal enough, it is difficult to meet the actual needs

Method used

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  • Activated carbon fiber-ozone oxidizing cooperated degradation method for the subaqueous phenolic compound
  • Activated carbon fiber-ozone oxidizing cooperated degradation method for the subaqueous phenolic compound

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Embodiment 1

[0017] Embodiment 1: the modification treatment of active carbon fiber

[0018] Put it into the carbonization activation furnace for secondary activation to expand its pore size to adjust the pore structure of the activated carbon, and modify the surface of the carbon by acid-base treatment. During the activation process, pass nitrogen gas as a protective gas, and when the temperature rises to 800°C, pass water vapor to activate for 40 minutes. In addition to water vapor, you can also choose carbon dioxide, ammonia, magnesium nitrate, iron nitrate and other metal salts as activators, either using one of the activators for activation, or using two activators in combination. activation. Because the molecular diameter of phenolic compounds in wastewater is in the range of 0.7-1nm, only the pore size on the surface of activated carbon is larger than 1nm can efficiently adsorb these organic substances. Therefore, the purpose of activation is to expand the pore size of the activat...

Embodiment 2

[0019] Embodiment 2: Utilize the high efficiency of degrading phenolic compound waste water after the activated carbon fiber in embodiment 1 is modified.

[0020] The device for catalytic ozonation of active carbon fiber to degrade organic pollutants in water is an ozonation reactor with sand core and air distribution. The gas source can be compressed air or oxygen, which enters the ozone generator after drying and filtering. The gas distribution device of the ozone reactor is a sand core at the bottom. When the ozonated gas passes through, tiny bubbles are generated to accelerate the dissolution of the gas phase ozone molecules into the water. In order to ensure better fluidization of activated carbon fibers in the ozone reactor, so as to fully contact with phenolic substances in water and dissolved ozone, activated carbon fibers are cut into blocks of different sizes according to the diameter of the reactor. The presence of activated carbon fibers increases the residence ti...

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Abstract

The invention relates to an activated carbon fiber-ozonation method for degrading phenolic compounds in water in the field of water treatment. The technical solution is that the bottom of the reactor is equipped with a gas distribution plate connected to the ozone generator, and the upper part of the gas distribution plate is equipped with a single or multi-layer modified activated carbon fiber; the amount of activated carbon fiber in the reactor is 1-6g / L in wastewater, The ozonated gas concentration is 5-12mg / L, the flow rate is 0.1-0.5m3 / h, the treatment time is 5-30min, and the pH value of the wastewater is adjusted below 6. The invention can degrade organic pollutants into carbon dioxide, water and non-toxic by-products, and has many advantages such as high efficiency, low cost, simple process, easy operation, and no secondary pollution to the environment.

Description

technical field [0001] The invention belongs to the application of catalytic ozonation technology in the field of water treatment, and in particular relates to an activated carbon fiber-ozonation method for degrading phenolic compounds in water. Background technique [0002] Environmental protection and water resources management have attracted great attention from the Chinese government. Revolving around the important subject of environmental protection and water treatment, relevant institutions have carried out a lot of research and application. The traditional ozone oxidation method has been widely used in water treatment. However, the solubility of ozone in water is relatively low, and its stability is poor, so that the treatment efficiency of ozonation is relatively low, and the pollutants cannot be completely mineralized, so the application in water treatment has been limited. In order to strengthen the effect of ozone treatment and improve the utilization rate and de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/78C02F1/58C02F101/34
Inventor 郑经堂曲险峰李涛江张延宗赵玉翠徐桂明李石于维钊刘颖蔡升
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)