Comparison of the degradation of p-hydroxybenzoic acid in aqueous solution by several oxidation processes

被引：81
|
作者：
Beltran-Heredia, J [1 ]
Torregrosa, J
Dominguez, JR
Peres, JA
机构：
[1] Univ Extremadura, Dept Ingn Quim & Energet, E-06071 Badajoz, Spain
[2] Univ Tras Montes & Alto Douro, Dept Quim, P-5001 Vila Real, Portugal
来源：
CHEMOSPHERE | 2001年 / 42卷 / 04期
关键词：
p-hydroxybenzoic acid; AOPs; kinetics; photolysis; ozonation; Fenton's reagent;
D O I：
10.1016/S0045-6535(00)00136-3
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A comparative study is made of 12 methods of chemical oxidation applied to degrading p-hydroxybenzoic acid in aqueous solution. The oxidation processes tested were: UV, O-3, UV/TiO2, O-3/Fe2+, O-3/H2O2, O-3/UV, UV/H2O2, H2O2/Fe2+, H2O2/Fe2+/O-3, UV/H2O2/O-3, H2O2/Fe2+/UV and Os/UV/H2O2/Fe2+. The 12 processes were ranked by reactivity. In a kinetic study, the overall kinetic rate constant was split up into three components: direct oxidation by UV irradiation (photolysis), direct oxidation by ozone (ozonation), and oxidation by free radicals (mainly OH.). (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：351 / 359
页数：9
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