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Selective degradation of orange II with the cobalt (II) – bicarbonate – hydrogen peroxide system / Xuejun Long in Industrial & engineering chemistry research, Vol. 51 N° 37 (Septembre 2012) 

Public ISBD [article]  in Industrial & 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