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Dye wastewater photocatalytic treatment method

A technology for dye wastewater and treatment methods, which is applied in the field of degradation dye wastewater and photocatalytic degradation treatment of dye wastewater, can solve the problems of late nano-titanium dioxide, and achieve the effects of mild conditions, good appearance and high efficiency

Inactive Publication Date: 2015-10-28
HUANGGANG NORMAL UNIV
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Problems solved by technology

Domestic research on the preparation and modification of nano-titanium dioxide started relatively late, and the research direction is mainly on the photocatalytic activity of titanium dioxide powder and coating. At present, there is no research on the application of silica-titania composite monolithic columns to the treatment of dye wastewater.

Method used

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  • Dye wastewater photocatalytic treatment method
  • Dye wastewater photocatalytic treatment method

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preparation example Construction

[0028] The preparation method of the monolithic column of silica-titania composite material provided by the invention comprises the following steps:

[0029] Step S100, take absolute ethanol, add polyethylene glycol, add concentrated nitric acid, tetraethyl orthosilicate, tetraisopropyl titanate, and glacial acetic acid dropwise in sequence, and magnetically stir at room temperature to obtain a mixed sol.

[0030] In this step, the reaction vessel is a 25 milliliter round bottom flask; the consumption of said dehydrated alcohol, polyethylene glycol, concentrated nitric acid, tetraethyl orthosilicate, tetraisopropyl titanate, and glacial acetic acid are respectively 3.68 grams, 0.40 gram, 0.5 gram, 2.08 gram, 0.71 gram, 3.0 gram, the mode of described dripping reagent is slow drop; For a quick stir.

[0031] In this step, the tetraisopropyl titanate and tetraethyl orthosilicate are hydrolyzed and polycondensed in an acidic organic medium to obtain corresponding hydrate-contain...

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Abstract

The present invention relates to a dye wastewater photocatalytic treatment method, pertaining to the technical field of environmental protection. According to the treatment method, parameters of a sol-gel method are optimized; a silicon dioxide-titanic dioxide composite monolithic column is prepared; 15.64 grams of the silicon dioxide-titanic dioxide composite monolithic column is added to dye wastewater per liter; condensed water is added; air is blown into the wastewater; and the wastewater is irradiated under the ultraviolet light for 4 hours. The silicon dioxide-titanic dioxide composite monolithic column provided by the invention is good in appearance, good in mechanical strength, and high in catalytic efficiency. The photocatalytic treatment method is capable of effectively degrading the dye wastewater, recycling the silicon dioxide-titanic dioxide composite monolithic column and solving dye sewage treatment and recycling problems, and has high practical value in treating dye wastewater.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and relates to a photocatalytic degradation treatment method of dye wastewater. In particular, it relates to the degradation of dye wastewater by using a monolithic column of silica-titania composite material. Background technique [0002] With the development of dye and printing and dyeing industry, dye wastewater has become one of the main sources of water pollution. Dye wastewater has complex components, high organic content, and deep color, which is increasingly harmful to the water environment. After the dye wastewater enters the natural water body, it will not only affect the water quality of the natural water body, but also cause the color pollution of the water body, impact the visual system of humans and animals, reduce the permeability of light in the water body, affect the photosynthesis of aquatic plants, and lead to the deterioration of the water body ecosystem . ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32
Inventor 龙涛徐兰英李士明张婷
Owner HUANGGANG NORMAL UNIV
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