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A kind of ultraviolet assisted heterogeneous Fenton oxidation sewage treatment method

A sewage treatment method, heterogeneous Fenton's technology, applied in the field of environmental pollution control, can solve the problems of large equipment investment, complex catalyst recovery technology, long time, etc., and achieve low internal diffusion resistance, long service life, and not easy to lose Effect

Inactive Publication Date: 2016-08-24
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the existing heterogeneous Fenton oxidation process has problems such as complex catalyst recovery technology, long time, and large equipment investment.

Method used

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  • A kind of ultraviolet assisted heterogeneous Fenton oxidation sewage treatment method
  • A kind of ultraviolet assisted heterogeneous Fenton oxidation sewage treatment method
  • A kind of ultraviolet assisted heterogeneous Fenton oxidation sewage treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]Prepare 0.25% (w / v) aqueous solution of disodium dodecyl glutamate, add 0.48ml 0.1M HCl, stir at 80°C for 30 minutes; / v) Add ethanol, stir for 30 minutes, add 3-aminopropyl group according to the molar ratio of disodium dodecyl glutamate, 3-aminopropyltrimethoxysilane and tetraethyl orthosilicate to 1:2.3:2.67 Trimethoxysilane and tetraethyl orthosilicate, stir at 30°C for 30 minutes; when the color of the solution is slightly milky, insert a glass slide cleaned by ethanol ultrasonic cleaning, let it stand at room temperature for 2 hours, take out the glass slide, and ultrasonically in ethanol for 10 minutes, at 80°C dried to obtain SiO with vertical channels 2 mesoporous film. Will deposit mesoporous SiO with vertical channels 2 The glass slide of the film was placed in a mixed solution of ethanol / ethanolamine with a volume ratio of 1:5, refluxed at 80°C for 24h, rinsed with ethanol, and mesoporous SiO 2 The template agent in the vertical channel of the film was dis...

Embodiment 2

[0044] Prepare 10μM rhodamine B aqueous solution, adjust the pH value to 3.5, take 5ml and add it to a beaker wrapped in tin foil, put it in a dark box, and put 1cm×1cm PB / VC SiO 2 Glass slides of mesoporous films, added with H 2 o 2 Make the final concentration 1 mM, turn on the ultraviolet lamp and continue to irradiate the solution for 40 minutes, and the decolorization rate reaches 99%.

Embodiment 3

[0046] Prepare 10μM bismarck brown aqueous solution, adjust the pH value to 3.5, take 5ml and add it to a beaker wrapped in tin foil, put it in a dark box, and put 1cm×1cm PB / VC SiO 2 Glass slides of mesoporous films, added with H 2 o 2 Make the final concentration 10mM, turn on the ultraviolet lamp and continue to irradiate the solution for 40 minutes, and the decolorization rate reaches 95%.

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Abstract

The invention discloses a sewage treatment method adopting ultraviolet light assisted heterogeneous Fenton oxidation. According to the method disclosed by the invention, a catalyst membrane adopted has vertical mesoporous channels and is small in inner diffusion resistance, large in specific surface area, high in catalytic efficiency and suitable for treating organic pollutants of a complex system; meanwhile, a substrate of the membrane catalyst and a support of the substrate are homogeneous substances, are closely combined with each other and can be assembled for use in the form of tubes, plates or sheets, so that the catalyst recycle problems of the conventional homogeneous Fenton oxidation methods and other heterogeneous Fenton oxidation methods can be solved; meanwhile, according to the method disclosed by the invention, Prussian blue which is a precursor of an active catalytic component is combined with the substrate in a self-assembled manner, and therefore the combination is firm, the precursor is hard to run away or fall off and is long in service life; besides, the method disclosed by the invention is simple to operate, high in catalytic efficiency and good in popularization prospect.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a method for treating sewage by ultraviolet light-assisted heterogeneous Fenton oxidation. Background technique [0002] The Fenton oxidation method uses Fe 2+ ion excited H 2 o 2 Generate strong oxidizing OH free radicals, directly mineralize organic pollutants in wastewater into small inorganic molecular compounds, or convert them into low-toxic, easily biodegradable intermediate products, which are beneficial to further decomposition of water treatment methods. With the deepening of research, people have combined ultraviolet light, ultrasound, electrochemical technology and Fenton system to produce photo-Fenton oxidation method, acoustic-Fenton oxidation method and electro-Fenton oxidation method. For example, the publication number is The invention patent application of CN102989460A discloses a preparation of a heterogeneous Fenton catalyst and a me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/72C02F1/32C02F1/50B01J31/18
CPCB01J31/1805B01J2531/842C02F1/32C02F1/725C02F2103/34C02F2305/10
Inventor 苏文琼车顺爱丁显廷
Owner SHANGHAI JIAOTONG UNIV
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