Optimizing electron spin resonance detection of hydroxyl radical in water.
Chemosphere
; 52(10): 1797-805, 2003 Sep.
Article
em En
| MEDLINE
| ID: mdl-12871746
ABSTRACT
The parameters affecting the electron spin resonance (ESR) detection of hydroxyl free radical in water are studied and optimized. The hydroxyl radical is generated by the Fenton reaction with iron (II) ammonium sulfate and hydrogen peroxide reacting in a phosphate buffer using N-tert-butyl-alpha-phenylnitron as the spin trap. The concentrations of Fe(2+), H(2)O(2), and phosphate buffer are the parameters studied. The Taguchi method and the orthogonal experiment design were used to evaluate the effects of these parameters on the ESR signal intensity. By the analysis of the signal-to-noise ratio and the analysis of variance, the order of importance of the various parameters on the hydroxyl radical formation is determined for optimal ESR detection of hydroxyl radical. The results will help the development of water purification technologies using hydroxyl free radical as a green oxidant.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Água
/
Radical Hidroxila
/
Espectroscopia de Ressonância de Spin Eletrônica
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
Chemosphere
Ano de publicação:
2003
Tipo de documento:
Article