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Study on the Degradation of X-3B by Microwave Assisted Photocatalysis Method

Author: YangPeng
Tutor: LuXiaoHua
School: Huazhong University of Science and Technology
Course: Environmental Science
Keywords: Photocatalytic Oxidation Microwave X-3B Adsorptive carriers
CLC: X703.5
Type: Master's thesis
Year: 2005
Downloads: 179
Quote: 1
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Abstract


The photocatalytic oxidation technology developed in recent years as a new water treatment technology . Due to its high efficiency , no secondary pollution , with the potential for direct use of solar energy , and much of the attention of scholars . 2 photocatalyst poor separation efficiency , low quantum efficiency of sunlight utilization and low paper prepared using the sol - gel to Rectorite , pumice and columnar activated carbon for ordinary TiO ( GAC) and other absorbent material as the carrier of TiO 2 photocatalyst, their photocatalytic activity . Representative azo dyes - reactive red X-3B as the target pollutants studied decolorization process of dye wastewater in microwave-assisted photocatalytic oxidation (MW / PCO) reaction conditions, the effects of factors , and to explore MW UV coupled to improve the quantum efficiency of the photocatalytic action mechanism . The results are as follows : 1 X -3B solution decolorization rate in different oxidation system in descending order : MW/UV/TiO2 gt ; MW / UV gt ; UV/TiO2 gt ; UV . The MW synergies with UV/TiO2 ; 2 concentrations in the range of 100 ~ 1000mg / L , the decolorization of X -3B solution microwave assisted photocatalysis (MW/UV/TiO2) obey a kinetic equation of the reaction . MW / UV / TiO 2 system , acidic and alkaline conditions improve the light degrees as well as plus H 2 < / sub . > O 2 could improve X - 3B decolorization rate; 3. use of adsorbent materials as a carrier , helping TiO 2 fixed on the carrier , and can play a synergism of the adsorption and catalytic oxidation , to achieve the pollutants in the large enrichment of the optical surface of the catalyst , so that the photocatalytic efficiency . The presence of a microwave field , is conducive to the regeneration of the adsorbent material , to increase the life of the photocatalyst with the carrier ; 4 X -3B , in the photocatalytic reaction in the microwave-assisted bleaching is photocatalytic oxidation and direct photolysis two reactions together results. Microwave-assisted photocatalytic degradation of X-3B · OH electrophilic addition mechanism , X-3B photocatalytic degradation mechanism , the introduction of the microwave and no change in the mechanism of degradation of X-3B .

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization > Additives
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