Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof

A technology of light transmittance and photocatalysis, which can be used in illumination water/sewage treatment, water/sewage treatment, oxidized water/sewage treatment, etc. The effect of fast reaction speed, small loss of light intensity and simple preparation method

Inactive Publication Date: 2020-06-16
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the practical application of photocatalytic water treatment, granular or powdery photocatalysts are very easy to settle in water and be lost with the washing or flow of sewage, so they need to be fixed. Chinese patent application CN201810436343.0 discloses a Thin film plate for photodegradation of phenol pollutants in sewage, which uses photocatalyst TiO 2 Immobilized into the hybrid film and adhered to the dotted glass slide to form a thin film plate, which can be immersed in sewage when used, which greatly reduces the loss of photocatalyst, but it is inconvenient to use in sewage with low light transmittance , when the concentration of pollutants or suspended sediment in the sewage is high to block the incident light, the transmittance of the sewage will be greatly reduced. In order to increase the light intensity at the film plate to ensure the reaction rate, it is necessary to increase the light intensity of the light source or according to the Adjust the thin film plate to make it close to the liquid level when the tank liquid level changes, the former increases energy consumption, and the latter is cumbersome to operate

Method used

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  • Low-transmittance sewage photocatalytic treatment composite board and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0022] Titanium dioxide particles were used as photocatalyst, and the titanium dioxide photocatalytic treatment composite board was prepared according to the above method. The amount of fixed photocatalyst was measured to be 0.008g by differential gravimetry, and the photocatalytically treated composite board was placed on a 100ml*10ppm sunfast dye solution, and a 50W xenon lamp was provided as a radiation source above the petri dish. After 12 hours, the degradation rate of the tanning dye solution was 49.9%.

[0023] The structure of the substances in the above sun-resistant tanning solution is complex and difficult to degrade, and all light within the wavelength range of 190nm to 700nm is absorbed, and the light transmittance is low. Under the same conditions, the traditional suspension-type degradation method was used to directly disperse the same amount of photocatalyst in the same sunfast tanning solution, and the above xenon lamp was also used as the light source. After ...

Embodiment 2

[0026] Using graphite phase carbon nitride as photocatalyst, prepare graphite phase carbon nitride photocatalytic treatment composite plate according to the above method. Treat 100ml*10ppm Rhodamine B solution without quartz sand and Rhodamine B solution containing quartz sand with the prepared photocatalytic treatment composite plate and traditional suspension method respectively (adding quartz sand to simulate the presence of sediment in sewage , the solution was stirred and then the experiment was started), a 50W xenon lamp was provided as a radiation source, and the degradation rate after 1 hour was tested. In particular, the fixed amount of photocatalyst of the photocatalytic composite plate in this experiment was 0.006g, which was much smaller than that of the suspension type degradation method The amount of photocatalyst coal added (0.04g), this is because in the traditional suspension type degradation method, when the amount added is 0.006g, the degradation rate is lowe...

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Abstract

The invention relates to a low-transmittance sewage photocatalytic treatment composite board and a preparation method thereof, and belongs to the technical field of sewage treatment. The composite board comprises a light-transmitting base material board and photocatalyst particles on the surface of the light-transmitting base material board, the light-transmitting base material board is of a boat-type structure, and the photocatalyst particles are fixed to the outer side of the bottom face of the light-transmitting base material board through a waterproof transparent double-sided adhesive tape. The composite board is prepared by the following steps: adhering one adhesive surface of a waterproof transparent double-sided adhesive tape to the outer side of the bottom surface of the light-transmitting base material, smearing the other adhesive surface of the waterproof transparent double-sided adhesive tape with the photocatalyst particles and performing ultrasonic vibration treatment to remove the photocatalyst particles which are not firmly adhered. The composite board floats on the liquid level of sewage, the photocatalyst particles are bonded to the bottom of the composite board, incident light directly penetrates through the light-transmitting base material board to make contact with the photocatalyst particles, the influence of sewage light transmittance is avoided, the illumination intensity loss is small, the reaction speed is high, and the composite board is suitable for treating low-light-transmittance sewage; the photocatalyst is fixed through the waterproof transparent double-sided adhesive tape, and the preparation method is simple.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a composite plate for photocatalytic treatment of sewage with low light transmittance and a preparation method thereof. Background technique [0002] Photocatalytic oxidation technology is one of the advanced oxidation methods. Its principle is that photogenerated electron-hole pairs generated by photocatalysts under light radiation interact with dissolved oxygen or water molecules in water to further generate highly oxidizing hydroxyl radicals. , superoxide radicals and other intermediate active substances can completely oxidize pollutant molecules. However, in the practical application of photocatalytic water treatment, granular or powdery photocatalysts are very easy to settle in water and be lost with the washing or flow of sewage, so they need to be fixed. Chinese patent application CN201810436343.0 discloses a Thin film plate for photodegradation of phenol polluta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/30C02F1/72
CPCC02F1/30C02F1/725C02F2101/308C02F2305/10
Inventor 周树涛刘帅段明
Owner SOUTHWEST PETROLEUM UNIV
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