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Preparation method of magnetic photocatalyst for sewage treatment

A photocatalyst and sewage treatment technology, applied in the direction of adsorption water/sewage treatment, light water/sewage treatment, physical/chemical process catalysts, etc., can solve the problems of easy agglomeration, difficult separation and recycling, and achieve avoidance of agglomeration and high reuse rate, the effect of improving water treatment efficiency

Pending Publication Date: 2019-05-28
刘华
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  • Description
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  • Application Information

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Problems solved by technology

First solved nano TiO 2 The problem of easy agglomeration during particle preparation, and secondly solved the problem of nano-TiO 2 Photocatalysts are easy to agglomerate when treating sewage and are difficult to separate and recycle. It has achieved the double effect of flocculation and photocatalytic degradation and decomposition of pollutants in sewage treatment, and the separation and recovery rate of magnetic photocatalyst has reached 99%, which can realize the convenience of catalyst and sewage. Rapid separation, no secondary pollution to the water body, and improved catalyst reuse rate

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of preparation method of magnetic photocatalyst for sewage treatment, its specific preparation steps are as follows:

[0037] (1) Nano-TiO 2 Sol preparation:

[0038] Disperse 60mL of tetrabutyl titanate in a mixed solution of 420mL of absolute ethanol and 6mL of glacial acetic acid, and stir evenly; mix 12g of γ-glycidyl etheroxypropyltrimethoxysilane with 12g of absolute ethanol, and add the above In the system, continue to stir; then adjust the pH of the system to 6 with hydrochloric acid solution, and stir evenly to obtain nano-TiO 2 Sol A;

[0039] (2) Nano-TiO 2 Preparation of sodium alginate / polyacrylamide composite hydrogel:

[0040] Dissolve 1g of sodium alginate in deionized water to prepare a 1% sodium alginate solution; add nano-TiO to the sodium alginate solution 2 Sol A, stir evenly to obtain composite hydrogel B; add 10g acrylamide, 2g acrylic acid to composite hydrogel B and stir evenly, then feed nitrogen into the reaction system, then add 0...

Embodiment 2

[0047] A kind of preparation method of magnetic photocatalyst for sewage treatment, its specific preparation steps are as follows:

[0048] (1) Nano-TiO 2 Preparation of sol: Disperse 70mL of tetrabutyl titanate in a mixed solution of 490mL of absolute ethanol and 7mL of glacial acetic acid, and stir evenly; after mixing 14g of γ-glycidyl etheroxypropyltrimethoxysilane and 14g of absolute ethanol, Add dropwise to the above system and continue to stir; adjust the pH of the system to 6 with hydrochloric acid solution, and stir evenly to obtain nano-TiO 2 Sol A;

[0049] (2) Nano-TiO 2 Preparation of sodium alginate / polyacrylamide composite hydrogel:

[0050] Dissolve 2g of sodium alginate in deionized water to prepare a 1.5% sodium alginate solution; add nano-TiO to the sodium alginate solution 2 Sol A, stir evenly to obtain composite hydrogel B; add 8.5g acrylamide and 2.5g acrylic acid to composite hydrogel B, stir evenly, then pass nitrogen into the reaction system, and t...

Embodiment 3

[0057] A kind of preparation method of magnetic photocatalyst for sewage treatment, its specific preparation steps are as follows:

[0058] (1) Nano-TiO 2 Sol preparation:

[0059] Disperse 85mL of tetrabutyl titanate in a mixed solution of 600mL of absolute ethanol and 8.5mL of glacial acetic acid, and stir evenly; mix 34g of γ-glycidyl etheroxypropyltrimethoxysilane with 34g of absolute ethanol, and add dropwise In the above system, continue to stir; adjust the pH of the system to 6 with hydrochloric acid solution, and stir evenly to obtain nano-TiO 2 Sol A;

[0060] (2) Nano-TiO 2 Preparation of sodium alginate / polyacrylamide composite hydrogel:

[0061] Dissolve 3g of sodium alginate in deionized water to prepare a 2% sodium alginate solution; add nano-TiO to the sodium alginate solution 2 Sol A, stir evenly to obtain composite hydrogel B; add 7g acrylamide and 3g acrylic acid to composite hydrogel B and stir evenly, then feed nitrogen into the reaction system, then a...

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Abstract

The invention discloses a preparation method of a magnetic photocatalyst for sewage treatment. According to the preparation method of the magnetic photocatalyst, the magnetic photocatalyst is preparedin the mode that a magnetic material and nano titanium dioxide are wrapped with polymers in situ, the separation efficiency of the photocatalyst is improved through the mode of combination of wrapping and magnetic separation, and the mode of treating sewage by double effects of flocculation and photocatalysis is achieved. The separation and recovery rate of the catalyst reaches 99% or above, andthe ideal removal effect on both organic matter and odor in the sewage is achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a preparation method of a magnetic photocatalyst for sewage treatment. Background technique [0002] With the acceleration of industrialization and the improvement of human living standards, the discharge of industrial wastewater and domestic sewage is increasing, and the problem of water pollution is becoming more and more serious, which makes people pay a heavy price. Due to the complex sources of industrial wastewater and domestic sewage, such as the different components of factory wastewater, it is necessary to research and develop a technology suitable for the treatment of various pollutants. [0003] The surface effect of nanomaterials makes them have high chemical activity. The smaller the particles, the higher the surface activity, and they are easy to combine with other atoms, making them widely concerned in the field of sewage treatment. [0004] Nano-TiO 2 With the el...

Claims

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Application Information

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IPC IPC(8): B01J31/38C02F1/30C02F1/52C02F1/56C02F1/28
Inventor 刘华
Owner 刘华
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