Reduction of Methylene Blue by Ascorbic Acid: Kinetic and Thermodynamic Aspects
Abstract
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.
Kurzfassung
In diesem Beitrag wird die Reduktion von Methylenblau (MB) durch Ascorbinsäure (H2As) im wässrigen basischen Millieu und mizellaren Lösungen behandelt. Das Ascorbation (As2–) ist ein effektives Reduktionsmittel für die Entfärbung von Methylenblau unter Umgebungsbedingungen. Die Wirkungen von „salting-in“ – und „salting-out“-Mitteln für die Echtzeitanwendung im Reduktionsprozess wurden untersucht. Es wurde gefunden, dass Harnstoff („salting-in“-Mittel) die Reduktionsgeschwindigkeit von MB durch As2– in Gegenwart von Mizellen einzigartig verstärkt. Detaillierte kinetische und thermodynamische Aspekte wurden geprüft, um die Wechselwirkungen zwischen Methylenblau und dem Ascorbationen zu erfassen. Die kinetischen Studien zeigten, dass die Reaktionskinetik Pseudo-Erster-Ordnung ist.
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© 2012, Carl Hanser Verlag, München
Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Abstracts
- Abstract
- Novel Surfactants
- Biosurfactants – Exotic Specialties or Ready for Application?
- Synthesis and Interfacial Properties of Novel Imidazoline Gemini Surfactants
- Analytical Chemistry
- Two-Phase Titration Method for Cationic Surface Active Agents Determination with Use of 5-(3-Bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium Perchlorate Dye
- Physical Chemistry
- Reduction of Methylene Blue by Ascorbic Acid: Kinetic and Thermodynamic Aspects
- Investigating the Activity of Zirconia as a Catalyst and a Support for Noble Metals, in Green Oxidation of Cyclohexane
- Investigating the Catalytic Activity of Monoclinic Zirconia; Oxidation of Benzyl Alcohol in Aqueous Medium at Mild Conditions
- Application
- Synthesis and Characterization of Mesoporous Alumina-Zirconia as Catalyst Support for Suzuki Coupling Reaction
- Cleaning Technology
- A new place setting – Consumer-relevant measuring unit for domestic dishwashers
- Minimum Protocol for Comparative Detergent Performance Testing Detergent Testing) A.I.S.E. Working Group
- Conference and Meeting Report
- Biosurfactants, New Ingredients and Formulations, Sustainability, Forum for Innovations
Articles in the same Issue
- Contents/Inhalt
- Contents
- Editorial
- Editorial
- Abstracts
- Abstract
- Novel Surfactants
- Biosurfactants – Exotic Specialties or Ready for Application?
- Synthesis and Interfacial Properties of Novel Imidazoline Gemini Surfactants
- Analytical Chemistry
- Two-Phase Titration Method for Cationic Surface Active Agents Determination with Use of 5-(3-Bromo-4-hydroxy-5-methoxyphenyl)-7,7-dimethyl-7H-indolo[1,2-a]quinolinium Perchlorate Dye
- Physical Chemistry
- Reduction of Methylene Blue by Ascorbic Acid: Kinetic and Thermodynamic Aspects
- Investigating the Activity of Zirconia as a Catalyst and a Support for Noble Metals, in Green Oxidation of Cyclohexane
- Investigating the Catalytic Activity of Monoclinic Zirconia; Oxidation of Benzyl Alcohol in Aqueous Medium at Mild Conditions
- Application
- Synthesis and Characterization of Mesoporous Alumina-Zirconia as Catalyst Support for Suzuki Coupling Reaction
- Cleaning Technology
- A new place setting – Consumer-relevant measuring unit for domestic dishwashers
- Minimum Protocol for Comparative Detergent Performance Testing Detergent Testing) A.I.S.E. Working Group
- Conference and Meeting Report
- Biosurfactants, New Ingredients and Formulations, Sustainability, Forum for Innovations