[article] 
inIndustrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11998–12003

Titre :	Selective degradation of orange II with the cobalt (II) – bicarbonate – hydrogen peroxide system
Type de document :	texte imprimé
Auteurs :	Xuejun Long, Auteur ; Zhen Yang, Auteur ; Hong Wang, Auteur
Année de publication :	2012
Article en page(s) :	pp. 11998–12003
Note générale :	Industrial chemistry
Langues :	Anglais (eng)
Mots-clés :	Catalyst
Résumé :	A simple and efficient approach to orange II (AOII) degradation using Co2+–HCO3– system as the catalyst and H2O2 as the oxidant under mild reaction conditions was reported. Complete decolorization of 50 μM AOII was observed with 5 μM Co2+ ions and 4 mM H2O2 in 10 mM NaHCO3 aqueous solution after 10 min, which was much faster that that of Fenton reagent with 50 μM Fe2+ ions. Some intermediate products such as carboxylic acids were detected by electrospray ionization-ion trap mass spectrometry and ion chromatography. In the presence of other pollutants such as methylene blue, sulforhodamine B, and a significant amount of anions including Cl–, CO32–, SO42–, NO3–, HPO42–, and CH3COO–, AOII was still rapidly degraded. The results of photoluminescence probing technology, electron spin resonance spin-trapping technology, and radical trap experiments indicated that the tightly associated hydroxyl radicals with the cobalt complex were the reactive species for AOII degradation.
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie3013924

[article] Selective degradation of orange II with the cobalt (II) – bicarbonate – hydrogen peroxide system [texte imprimé] / Xuejun Long, Auteur ; Zhen Yang, Auteur ; Hong Wang, Auteur . - 2012 . - pp. 11998–12003.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 37 (Septembre 2012) . - pp. 11998–12003

Mots-clés :	Catalyst
Résumé :	A simple and efficient approach to orange II (AOII) degradation using Co2+–HCO3– system as the catalyst and H2O2 as the oxidant under mild reaction conditions was reported. Complete decolorization of 50 μM AOII was observed with 5 μM Co2+ ions and 4 mM H2O2 in 10 mM NaHCO3 aqueous solution after 10 min, which was much faster that that of Fenton reagent with 50 μM Fe2+ ions. Some intermediate products such as carboxylic acids were detected by electrospray ionization-ion trap mass spectrometry and ion chromatography. In the presence of other pollutants such as methylene blue, sulforhodamine B, and a significant amount of anions including Cl–, CO32–, SO42–, NO3–, HPO42–, and CH3COO–, AOII was still rapidly degraded. The results of photoluminescence probing technology, electron spin resonance spin-trapping technology, and radical trap experiments indicated that the tightly associated hydroxyl radicals with the cobalt complex were the reactive species for AOII degradation.
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie3013924