Photo-catalysis method adopting ultrasonic atomizing process to enhance water pollution treatment effect

A sewage treatment, ultrasonic atomization technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, energy wastewater treatment, etc. High photocatalyst utilization rate and low photocatalyst utilization rate to achieve the effect of improving photocatalyst utilization rate, improving light energy utilization rate, and preventing agglomeration

Inactive Publication Date: 2014-05-07
BEIJING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The task of the present invention is to solve the existing problems of large mass transfer resistance between photocatalyst and waste water, low light energy utilization efficiency, and low photocatalyst utilization rate, and propose a method that can

Method used

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  • Photo-catalysis method adopting ultrasonic atomizing process to enhance water pollution treatment effect
  • Photo-catalysis method adopting ultrasonic atomizing process to enhance water pollution treatment effect
  • Photo-catalysis method adopting ultrasonic atomizing process to enhance water pollution treatment effect

Examples

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Effect test

Embodiment 1

[0024] Weigh powder nano TiO 2 Photocatalyst (30 nanometers of particle size) 0.25 gram, is dispersed in the beaker that weighs 100 milliliters containing pentachlorophenol concentration and is the simulated sewage of 10mg / L. The beaker was placed in an ultrasonic cleaner for ultrasonic dispersion for 30 minutes to destroy nanoaggregates. After the photocatalyst is fully mixed with the simulated sewage, it is poured into an atomization chamber with a volume of 150 ml, and the liquid level is 2.5 cm higher than the head of the ultrasonic transducer. Install the inner and outer chambers of the photoreactor with ultraviolet light source (UV-500, Beijing Tianmai Henghui Light Source Electric Co., Ltd.) on the top of the spray chamber, and the ultrasonic transducer (MU-360, Foshan Lifengda Machinery Equipment Co., Ltd.) Company) power on, the mist formed by the atomized droplets gradually rises, and when the height of the mist contacts the lower interface of the ultraviolet lamp, ...

Embodiment 2

[0027] Weigh powder nano TiO 2 0.1 g of photocatalyst (25 nanometers in particle size) was dispersed in a beaker weighing 100 ml of simulated sewage containing bisphenol A at a concentration of 10 mg / L. After 30 minutes of ultrasonic dispersion, pour it into the atomization chamber, and the liquid level is 3.2 cm higher than the head of the ultrasonic transducer. After atomization, the reaction was stopped after 60 minutes of ultraviolet light irradiation. Timing sampling analysis. All the other specific operations are the same as in Example 1.

[0028] Under the effect of ultrasonic atomization, the photocatalytic degradation rate of bisphenol A can be increased from 19.2% to 41.7% in 60 minutes (such as figure 2 shown).

Embodiment 3

[0030] Weigh powdered nano-Bi 2 o 3 Photocatalyst (120 nanometers of particle size) 0.35 gram, is dispersed in the beaker that weighs 100 milliliters containing pentachlorophenol concentration and is the simulated sewage of 10mg / L. After 30 minutes of ultrasonic dispersion, pour it into the atomization chamber, and the liquid level is 4.0 cm higher than the head of the ultrasonic transducer. After atomization, the xenon lamp was irradiated for 60 minutes to stop the reaction. Timing sampling analysis. All the other specific operations are the same as in Example 1.

[0031] Under the action of ultrasonic atomization, the photocatalytic degradation rate of pentachlorophenol can be increased from 14.9% to 66.8% within 60 minutes.

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Abstract

The invention belongs to the field of novel water pollution treatment technologies, and relates to a novel photo-catalysis water treatment technology adopting an ultrasonic atomizing process to enhance water pollution treatment effect. The novel photo-catalysis water treatment technology is characterized in that photo-catalyst-containing waste water is crushed into liquid drops of which the diameters are micron-sized; under the irradiation of a light source, photo-catalyst is stimulated to generate a photo-production active matter to catalyze and oxidize pollutants in a liquid membrane, so as to generate carbon dioxide, water and other virus-free degraded by-products. Due to the auxiliary function of ultrasonic atomizing, the external diffusion resistance of the surfaces of particles can be reduced, the mass transfer efficiency can be enhanced, the surface utilization ratio of the photo-catalyst can be improved, and catalyst poisoning can be avoided; the liquid membrane on the surface of the photo-catalyst serves as a reaction medium, so as to reduce loss of light diffusion and absorption, improve light energy utilization ratio and the utilization ratio of the photo-catalyst, and solve the problems such as catalytic activity reduction caused by clustering and precipitation of the photo-catalyst.

Description

technical field [0001] The invention belongs to the field of new technologies for water pollution treatment, and relates to a novel photocatalytic water treatment technology which strengthens the water pollution treatment effect through an ultrasonic atomization process. Background technique [0002] Human activities will discharge a large amount of industrial, agricultural and domestic waste into the water, polluting the water. Every year, more than 600 billion tons of sewage are discharged into natural water bodies around the world, polluting 5.5 trillion tons of clean water sources. In addition, a large amount of toxic and harmful substances flow into natural water bodies, resulting in a decline in water quality and damage to the water environment. Heavy metal compounds and toxic organic pollutants in sewage can poison aquatic organisms, destroy natural landscapes, and seriously affect the safety of drinking water sources. In addition, the organic matter in sewage, espe...

Claims

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Application Information

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IPC IPC(8): C02F9/08
CPCY02W10/37
Inventor 殷立峰代云容包月平牛军峰
Owner BEIJING NORMAL UNIVERSITY
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