The sonochemical decolorisation of textile azo dye CI Reactive Orange 127 / Celalettin Özdemir in COLORATION TECHNOLOGY, Vol. 127, N° 4 (2011)

[article]  inCOLORATION TECHNOLOGY > Vol. 127, N° 4 (2011) . - p. 268-273 Titre : The sonochemical decolorisation of textile azo dye CI Reactive Orange 127 Type de document : texte imprimé Auteurs : Celalettin Özdemir, Auteur ; Muhammed K. Öden, Auteur ; Serkan Sahinkaya, Auteur ; Dünyamin Güçlü, Auteur Année de publication : 2011 Article en page(s) : p. 268-273 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alcool polyvinylique Colorants -- Oxydation Colorants azoïques Colorants réactifs Décoloration Eaux usées -- Epuration Fenton, Réaction de Fer Ions métalliques Peroxyde d'hydrogène Le peroxyde d'hydrogène (H2O2), communément appelé eau oxygénée ou encore perhydrol (appellation industrielle), est un composé chimique liquide et visqueux, aux puissantes propriétés oxydantes (il est aussi réducteur). C'est donc un agent blanchissant efficace qui sert de désinfectant et (à haute concentration) d'oxydant ou monergol dans les fusées spatiales. Sonochimie Ultrasons Index. décimale : 667.3 Teinture et impression des tissus Résumé : In the present study, Fenton and sono-Fenton processes were applied to the oxidative decolorisation of synthetic textile wastewater including CI Reactive Orange 127 and polyvinyl alcohol. Process optimisation [pH, ferrous ion (Fe2+) and hydrogen peroxide (H2O2)], kinetic studies and their comparison were carried out for both of the processes. The sono-Fenton process was performed by indirect sonication in an ultrasonic water bath, which was operated at a fixed 35-kHz frequency and 80 W power. The optimum conditions were determined as [Fe2+] = 20 mg l−1, [H2O2] = 15 mg l−1 and pH = 3 for the Fenton process and [Fe2+] = 25 mg l−1, [H2O2] = 5 mg l−1 and pH = 3 for the sono-Fenton process. The colour removals were 89.9% and 91.8% by the Fenton and sono-Fenton processes, respectively. The highest decolorisation was achieved by the sono-Fenton process because of the production of some oxidising agents as a result of sonication. Consequently, ultrasonic irradiation in the sono-Fenton process slightly increased the colour removal to 91.8%, while decreasing the hydrogen peroxide dosage to one-third of that of the Fenton process. Note de contenu : EXPERIMENTAL : Materials - Experimental set-up - Sample analysis RESULTS AND DISCUSSION : Effect of initial pH - Effect of ferrous ion concentration - Effect of hydrogen peroxide concentration - Kinetic studies DOI : 10.1111/j.1478-4408.2011.00310.x Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=11907 [article]

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