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Titolo:
UV-H2O2 oxidation of monoazo dyes in aqueous media: a kinetic study
Autore:
Galindo, C; Kalt, A;
Indirizzi:
Ecole Natl Super Chim, Lab Chim Text, F-68093 Mulhouse, France Ecole Natl Super Chim Mulhouse France F-68093 , F-68093 Mulhouse, France
Titolo Testata:
DYES AND PIGMENTS
fascicolo: 1, volume: 40, anno: 1999,
pagine: 27 - 35
SICI:
0143-7208(19990104)40:1<27:UOOMDI>2.0.ZU;2-B
Fonte:
ISI
Lingua:
ENG
Soggetto:
PULSE-RADIOLYSIS; WATER;
Keywords:
UV-H2O2 oxidation; monoazodyes; tautomerism; kinetic; textile wastewaters; discolouration;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Galindo, C Ecolencetl Super Chim, Lab Chim Text, 3 Rue A Werner, F-68093 Mulhouse, Fra Ecole Natl Super Chim 3 Rue A Werner Mulhouse France F-68093 a
Citazione:
C. Galindo e A. Kalt, "UV-H2O2 oxidation of monoazo dyes in aqueous media: a kinetic study", DYE PIGMENT, 40(1), 1999, pp. 27-35

Abstract

During the past few years attention has been drawn on chemical techniques that could be used to discolour textile wastewaters. We have studied the photooxidation of several aqueous monoazodyes solutions in the presence of hydrogen peroxide. Irradiation was carried out with a low-pressure mercury lamp. We observed that the reaction is pseudo-first-order with respect to thedye concentration. The effects of hydrogen peroxide and dye dosages, temperature, pH, and chemical structure of the organic matter were also investigated. Results suggest that molecules, hydrazone form of which predominates,are the most sensitive to degrees OH oxidation. If a labile hydrogen atom is present in the chromophore, it is the primary target of the attack. (C) 1998 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 05:16:09