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Ozonized water treatment method taking nano zinc oxide as catalyst

A nano-zinc oxide and ozonated water technology, applied in the directions of oxidized water/sewage treatment, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve problems such as insufficient research scope, and achieve The effect of accelerated degradation rate and increased degree of mineralization

Inactive Publication Date: 2010-11-17
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there has been some research on the application of zinc oxide nanomaterials in catalytic ozonation, but the scope of research is still not extensive enough.

Method used

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  • Ozonized water treatment method taking nano zinc oxide as catalyst
  • Ozonized water treatment method taking nano zinc oxide as catalyst
  • Ozonized water treatment method taking nano zinc oxide as catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 55.0g Zn(CH 3 COO) 2 2H 2 O was dissolved in a beaker filled with 500ml deionized water, and 6.0mol / L ammonia water was added dropwise to it under vigorous stirring until the pH was about 10. During this process, the solution first changed from clear and transparent to viscous milky white suspension Then it became a clear and transparent solution. Cover the beaker with filter paper and continue to stir for 72h. After stopping the stirring, take out the white precipitate in the beaker, wash it with deionized water several times, put it in an oven, dry at 60°C for 12h, and grind Afterwards, three crucibles were put into the muffle furnace respectively, and the temperature was raised to 150°C, 200°C and 300°C at a rate of 2°C / min, respectively, and then calcined for 2 hours to obtain ZnO sample a, ZnO sample b and ZnO sample c. Its XRD see figure 1 , electron microscope photo see figure 2 .

Embodiment 2

[0024] The initial concentration of phenol in 200ml is 100mg L -1 In the simulated wastewater, add 0.20g of nano-zinc oxide sample a, start stirring, and pass ozone flow rate of 0.50mg min at the reaction temperature of 20°C -1 Ozone, record the concentration of phenol at different times. The result is as image 3 As shown, line 0 is ozonation alone (no catalyst), and line a is catalytic ozonation of nano-zinc oxide sample a. It indicated that the addition of nano-zinc oxide significantly promoted the degradation of phenol.

Embodiment 3

[0026] The initial concentration of phenol in 200ml is 100mg L -1 Add 0.20g of nano-zinc oxide sample b to the simulated wastewater, start stirring, and pass the ozone flow rate of 0.50mg min at the reaction temperature of 20°C -1 Ozone, record the concentration of phenol at different times. The result is as image 3 As shown, line 0 is ozonation alone (no catalyst), and line b is ozonation catalyzed by nano-zinc oxide sample b. It indicated that the addition of nano-zinc oxide significantly promoted the degradation of phenol.

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Abstract

The invention discloses an ozonized water treatment method taking nano zinc oxide as a catalyst, provides a preparation method and a using method for a nano catalyst, and belongs to the technical field of water treatment and environmental catalysis. The novel ozonized water treatment method is provided based on obtaining the nano zinc oxide by a simple and convenient sedimentation method and adding the nano zinc oxide serving as the catalyst into an ozonized water treatment system containing phenolic wastewater to promote the degradation of phenolic organic pollutants. The nano zinc oxide has the characteristics of small dimension, good dispersion and good stability, and has broad application prospect in ozonized water treatment.

Description

technical field [0001] The invention belongs to the field of water treatment and environmental catalysis, and relates to an ozonated water treatment method using nanometer zinc oxide as a catalyst. Background technique [0002] In the current industrial production process, the discharge of organic waste water is increasing. Most of the organic matter is toxic and difficult to degrade. The pollution and threat to the ecological environment and human health are also becoming more and more serious. The chemical oxidation method is aimed at In the case of low concentration of organic pollutants in sewage and lack of recycling value, oxidizing agents are used to oxidize and degrade organic matter without causing new pollution to eliminate pollution. o 3 It has strong oxidizing property (En=2.07V), is easy to produce, and the conditions of the ozonation process are mild, easy to operate, and the oxidative degradation of organic matter is relatively thorough, so it has a good pros...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/78B01J23/06
Inventor 董玉明蒋平平王光丽杨徐宗晓琳张翠红朱昊云
Owner JIANGNAN UNIV
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