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Fenton oxidative decolorization of the azo dye Direct Blue 15 in aqueous solution / Jian-Hui Sun in Chemical engineering journal, Vol. 155 N° 3 (Decembre 2009) 

Public ISBD [article]  in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 680-683 Titre : Fenton oxidative decolorization of the azo dye Direct Blue 15 in aqueous solution Type de document : texte imprimé Auteurs : Jian-Hui Sun, Auteur ; Shao-Hui Shi, Auteur ; Yi-Fan Lee, Auteur Année de publication : 2010 Article en page(s) : pp. 680-683 Note générale : Génie Chimique Langues : Anglais (eng) Mots-clés : Azo  dye  Direct  Blue  15  Decolorization  Fenton  process  AOPs Index. décimale : 660 Résumé : In this paper, the application of Fenton oxidation process for the decolorization of an azo dye Direct Blue 15 (DB15) in aqueous solution was investigated. The effect of initial pH, dosage of H2O2, H2O2/Fe2+ and H2O2/dye ratios and the reaction temperature on the decolorization efficiency and kinetic of the DB15 were studied, the operating parameters were preferred by changing one factor at one time while the other parameters were kept constant. The optimal conditions for the decolorization of DB15 were determined as pH = 4.0, [H2O2] = 2.8 × 10−3 mol/L, H2O2/Fe2+ ratio = 100:1, H2O2/dye ratio = 60:1 and temperature = 30 °C. Under the optimal conditions, 4.7 × 10−5 mol/L of the DB15 aqueous solution can be completely decolorized by Fenton oxidation within 50-min reaction time and the decolorization kinetic rate constant k was determined as 0.1694 min−1. Additionally increasing the reaction temperature from 20 to 40 °C showed a positive effect on the decolorization efficiency of DB15. The present study can provide guidance to relational industry operators and planners to effectively treat the DB15 contaminated wastewater by Fenton oxidation process. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X4RWW8-4&_user=6 [...] [article] Fenton oxidative decolorization of the azo dye Direct Blue 15 in aqueous solution [texte imprimé] / Jian-Hui Sun, Auteur ; Shao-Hui Shi, Auteur ; Yi-Fan Lee, Auteur . - 2010 . - pp. 680-683. Génie Chimique Langues : Anglais (eng) in Chemical engineering journal > Vol. 155 N° 3 (Decembre 2009) . - pp. 680-683 Mots-clés : Azo  dye  Direct  Blue  15  Decolorization  Fenton  process  AOPs Index. décimale : 660 Résumé : In this paper, the application of Fenton oxidation process for the decolorization of an azo dye Direct Blue 15 (DB15) in aqueous solution was investigated. The effect of initial pH, dosage of H2O2, H2O2/Fe2+ and H2O2/dye ratios and the reaction temperature on the decolorization efficiency and kinetic of the DB15 were studied, the operating parameters were preferred by changing one factor at one time while the other parameters were kept constant. The optimal conditions for the decolorization of DB15 were determined as pH = 4.0, [H2O2] = 2.8 × 10−3 mol/L, H2O2/Fe2+ ratio = 100:1, H2O2/dye ratio = 60:1 and temperature = 30 °C. Under the optimal conditions, 4.7 × 10−5 mol/L of the DB15 aqueous solution can be completely decolorized by Fenton oxidation within 50-min reaction time and the decolorization kinetic rate constant k was determined as 0.1694 min−1. Additionally increasing the reaction temperature from 20 to 40 °C showed a positive effect on the decolorization efficiency of DB15. The present study can provide guidance to relational industry operators and planners to effectively treat the DB15 contaminated wastewater by Fenton oxidation process. DEWEY : 660 ISSN : 1385-8947 En ligne : http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFJ-4X4RWW8-4&_user=6 [...]