Method for removing subaqueous organic matter with catalysis ozone oxidization

An ozone oxidation and water removal technology, applied in the field of water treatment, can solve the problems of difficult application, high cost, slow internal diffusion, etc., and achieve the effects of improving oxidation speed, improving utilization rate and high catalytic activity

Inactive Publication Date: 2008-09-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of low ozone utilization rate, insufficient oxidation of organic pollutants, high cost and easy loss of catalyst in the existing method of ozone oxidation to remove organic matter in water, and difficulty in large-scale production. Application, solid catalysts have the problems of surface inhomogeneity and slow internal diffusion, and provide a method for catalytic ozonation to remove organic matter in water

Method used

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Experimental program
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specific Embodiment approach 1

[0006] Specific embodiment one: the method for a kind of catalytic ozonation oxidation removal organic matter of this embodiment is realized by following steps: one, the water that contains organic pollutant enters ozone contact tower, and the initial concentration of ozone in control water is 0.5~2.0mgO 3 / mgTOC, the residence time of water in the ozone contact tower is 5 to 20 minutes; 2. The effluent of the ozone contact tower enters the catalytic bed filled with zero-valent iron and filling materials, and the residence time of water in the catalytic bed is 5 to 20 minutes. 20min; zero-valent iron and filling material are mixed in a volume ratio of 1 to 3:1; zero-valent iron is pure iron powder, nano-iron powder or iron scrap; filling material is activated carbon, coke, graphite, fly ash, charcoal, One or a mixture of natural zeolite, artificial zeolite, activated alumina, ceramsite, and molecular sieve.

specific Embodiment approach 2

[0007] Specific embodiment two: what this embodiment is different from specific embodiment one is that the initial concentration of ozone in the control water is 1mgO in step one. 3 / mgTOC, the residence time of water in the ozone contact tower is 10min. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0008] Specific embodiment three: the difference between this embodiment and specific embodiment one is that when the zero-valent iron used in step 2 is scrap iron scrap, the particle size of scrap iron scrap is 50nm~5mm; the scrap iron scrap is ground with a ball mill before use, Then sieve with a sieve with a pore size of 5 mm, wash with 0.5 mol / L hydrochloric acid after sieving, and then activate with 0.5 mol / L sodium hydroxide. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention relates to a method of catalytic ozone oxidation organic matter removal in water, which belongs to the water treatment technical field. The method solves the problems that: in the existing method of catalytic ozone oxidation organic matter removal in water, the utilization ratio of ozone is low, the organic pollutant is not enough oxidized, the cost is higher, and catalyzer is easily lost by adopting the metal catalytic ozone oxidation technology, the application is difficult to use in mass production, uneven surface exists on the solid catalyzer, and the inner diffusion velocity is lower. The method has the steps that: firstly, water containing the organic pollutant enters into an ozone contact tower; secondly, output water of the ozone contact tower enters into a catalyzing bed the inner part of which is filled with zerovalent ferric and filling material. The method solves the problems that uneven surface exists on the solid catalyzer and the inner diffusion velocity is lower, has the advantages of high catalytic activity, low cost, homogeneous catalysis oxidation and heterocatalysis oxidation of the catalyzer easily separating from water, improves the utilization ration of the ozone, and can be applied to the mass production.

Description

technical field [0001] The invention belongs to the technical field of water treatment. Background technique [0002] Refractory organics in drinking water have the characteristics of low content, refractory degradation, and easy to magnify their harm through food chain bioaccumulation. Therefore, the pollution of refractory organics in water and the problem of effective treatment have become a severe problem facing my country's water environment work. question. Ozone is commonly used as an oxidant to remove organic matter in water, but the intermediate products generated by the decomposition of organic matter will prevent the further oxidation of ozone, reduce the utilization rate of ozone, and have side effects on water quality, and the subsequent treatment is complicated. In recent years, a series of advanced oxidation processes have been developed, such as O 3 / H 2 o 2 , UV / O 3 , UV / H 2 o 2 , UV / H 2 o 2 / O 3 , O 3 / Metal oxide or photocatalytic oxidation, the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/78C02F1/70
Inventor 关小红马军李修华皇甫小留
Owner HARBIN INST OF TECH
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