Aniline degradation by combined photocatalysis and ozonation

被引：190

作者：

Sánchez, L ^{[1
]}

Peral, J ^{[1
]}

Domènech, X ^{[1
]}

机构：

[1] Univ Autonoma Barcelona, Dept Quim, Bellaterra 08193, Spain

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 1998年 / 19卷 / 01期

关键词：

aniline; degradation; photocatalysis; ozonation;

D O I：

10.1016/S0926-3373(98)00058-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The combination of TiO2-assisted photocatalysis and ozonation in the degradation of aniline in aqueous solution is investigated. From the experimental results obtained it is observed that the ozonation pretreatment followed by photocatalysis strongly increases the yield of TOC removal in comparison to either ozonation or photocatalysis carried out separately. The opposite sequence (photocatalysis pretreatment followed by ozonation) does not enhance the efficiency of aniline degradation. Nevertheless, the highest TOC removal was achieved by simultaneous ozonation and photocatalysis. A mechanism involving the formation of an ozonide anion radical previous to the generation of OH radicals is suggested to explain the synergic effect between ozone and TiO2 under illumination. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：59 / 65

页数：7

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