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

Authors
Beltran-Heredia, J Torregrosa, J Dominguez, JR Peres, JA
Citation
J. Beltran-heredia et al., Comparison of the degradation of p-hydroxybenzoic acid in aqueous solutionby several oxidation processes, CHEMOSPHERE, 42(4), 2001, pp. 351-359
Citations number
31
Categorie Soggetti
Environment/Ecology
Journal title
CHEMOSPHERE
ISSN journal
00456535 → ACNP
Volume
42
Issue
4
Year of publication
2001
Pages
351 - 359
Database
ISI
SICI code
0045-6535(200102)42:4<351:COTDOP>2.0.ZU;2-6
Abstract
A comparative study is made of 12 methods of chemical oxidation applied to degrading p-hydroxybenzoic acid in aqueous solution. The oxidation processe s 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 kineti c rate constant was split up into three components: direct oxidation by UV irradiation (photolysis), direct oxidation by ozone (ozonation), and oxidat ion by free radicals (mainly OH.). (C) 2000 Elsevier Science Ltd. All right s reserved.