Reduction of methylene blue by ascorbic acid : kinetic and thermodynamic aspects / H. J. Y. El-Aila in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 1 (01-02/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 1 (01-02/2012) . - p. 26-31 Titre : Reduction of methylene blue by ascorbic acid : kinetic and thermodynamic aspects Type de document : texte imprimé Auteurs : H. J. Y. El-Aila, Auteur Année de publication : 2012 Article en page(s) : p. 26-31 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Bleu de méthylène Cinétique chimique Ions ascorbate Micelles Réduction (chimie) Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : This article reports the reduction of methylene blue (MB) by ascorbic acid (H2As) in basic aqueous and micellar solutions. Ascorbate ion (As2–) is found to be an effective reducing agent for the decolorization of methylene blue under ambient condition. Effects of salting-in and salting-out agents have been investigated for real-time application in the reduction process. The salting-in agent urea has been found to uniquely enhance the rate of the reduction of MB by As2– in the presence of micelles. Detailed kinetic and thermodynamic aspects have been considered to realize the interaction between methylene blue and ascorbate ion. Kinetic studies revealed that the reaction follows pseudo first order reaction kinetics. Note de contenu : - EXPERIMENTAL : Materials and methods - Kinetics and instruments - RESULTS AND DISCUSSION : Reduction of methylene blue by ascorbate ion in aqueous solution - Micellar catalysis - Effect of temperature - Effect of salting-in and salting-out agent Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13309 [article]

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