Mechanistic Implications of Zinc(II) Ions on the Degradation of Phenol by the Fenton Reaction
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
|---|---|
| Data(s) |
29/10/2013
29/10/2013
02/08/2013
|
| Resumo |
A study of the interference of Zn2+ ions on phenol degradation by Fenton reaction (Fe2+/Fe3(+) + H2O2) is reported. One of the first intermediates formed in the reaction, catechol, can reduce Fe3+ to Fe2+ and, in the presence of H2O2 initiates an efficient catalytic redox cycle. In the initial stages of the reaction, this catechol-mediated cycle becomes the principal route of thermal degradation of phenol and its oxidation products. The Zn2+ ion addition enhances the persistence time of catechol, probably by stabilization of the corresponding semiquinone radical via complexation. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brasilia Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq), Brasilia FAPEAL FAPEAL ALCOA Foundation ALCOA Foundation FUNDECT FUNDECT CNPq CNPq INCT Catalysis INCT-Catalysis |
| Identificador |
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY, SAO PAULO, v. 23, n. 7, pp. 1372-1377, JUL, 2012 0103-5053 http://www.producao.usp.br/handle/BDPI/36313 10.1590/S0103-50532012000700022 |
| Idioma(s) |
eng |
| Publicador |
SOC BRASILEIRA QUIMICA SAO PAULO |
| Relação |
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY |
| Direitos |
closedAccess Copyright SOC BRASILEIRA QUIMICA |
| Palavras-Chave | #PHENOL #ZN2+ IONS #FENTON REACTION #AROMATIC-COMPOUNDS #HYDROGEN PEROXIDE #CATALYTIC AMOUNTS #FERRIC ION #OXIDATION #CATECHOL #REAGENT #IRON #EPR #HYDROXYLATION #CHEMISTRY, MULTIDISCIPLINARY |
| Tipo |
article original article publishedVersion |
