Influence of operating parameters on photocatalytic degradation of phenol in UV/TiO2 process

被引：0

作者：

Chiou, Chwei-Huann ^{[1
]}

Wu, Cheng-Ying ^{[1
]}

Juang, Ruey-Shin ^{[1
]}

机构：

[1] Department of Chemical Engineering and Materials Science, Yuan Ze University, Chung-Li, 32003, Taiwan

来源：

Chemical Engineering Journal | 2008年 / 139卷 / 02期

关键词：

The use of hydrogen peroxide (H2O2) for improved photocatalytic degradation of phenol in aqueous suspension of commercial TiO2 powders (Degussa P-25) was investigated. Photodegradation was compared using direct photolysis (UV alone); H2O2/UV; TiO2/UV; and H2O2/TiO2/UV processes in a batch reactor with high-pressure mercury lamp irradiation. The effects of operating parameters such as catalyst dosage; light intensity; pH of the solution; the initial phenol; and H2O2 concentrations on photodegradation process were examined. It was shown that photodegradation using H2O2/TiO2/UV process was much more effective than using either H2O2/UV or TiO2/UV process. The effect of the initial phenol concentration on TOC removal was also studied; demonstrating that more than 8 h was required to completely mineralize phenol into water and carbon dioxide. For all the four oxidation processes studied; photodegradation followed the first-order kinetics. The apparent rate constants with 400-W UV ranged from 5.0 × 10-4 min-1 by direct photolysis to 1.4 × 10-2 min-1 using H2O2/TiO2/UV process. The role of H2O2 on such enhanced photodegradation of phenol in aqueous solution was finally discussed. © 2007 Elsevier B.V. All rights reserved;

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摘要：

Journal article (JA)

引用

页码：322 / 329

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