The Oxidative Response and Viable Reaction Mechanism of the Textile Dyes by Fenton Reagent | [Pakistan Journal of Analytical & Environmental Chemistry • 2017]

Author(s):

1. Q. Masooda: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi-75270, Pakistan.

2. T. Hajira: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi-75270, Pakistan.

3. M. Sehar: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi-75270, Pakistan.

4. A. Mohsin: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi-75270, Pakistan.

5. R. Sitara: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi, Pakistan

6. A. Sundus: Photochemistry Research Lab, Department of Chemistry, University of Karachi, Karachi, Pakistan

Abstract:

The mechanism of the degradation of the Reactive Red 239 and Reactive Blue 19 by Fenton reagent was studied by advanced oxidation process in aqueous medium. The spectroscopic technique was adopted for the measurements of dye concentration. Moreover they were determined at 540 nm and 590 nm, respectively. Kinetics of the reaction was studied under the effect of concentration of reactive dyes, concentration of oxidant were followed under pseudo first order condition and found to influence the catalytic mechanism. The pH of the medium, vibrant response of several cations and anions and influence of ionic strength on the reaction kinetics were also monitored. Physical evidences for the degradation and mineralization of the dyes were evaluated by Lime water test, Ring Test and TLC test also confirmed the degradation of dye. Inhibitory effects of dyes were observed by CO3-, HCO3-, HPO42-, Cl-, I- Al3+ and Na+. Thermodynamic activation parameters in the oxidation reaction were studied and mode of mechanism was suggested on the basic of these parameters. This study explored the safe and eco friendly degradation of the textile dyes under Pseudo first order rate constant. It was observed that Fenton assisted degradation of the dyes under controlled conditions was found to be favorable for the treatment of textile wastewater. Moreover compared to other chemical methods it is effective and harmless to the environment.

Page(s): 143-154

DOI: DOI not available

Published: Journal: Pakistan Journal of Analytical & Environmental Chemistry, Volume: 18, Issue: 2, Year: 2017

Keywords:

advanced oxidation , Ionic strength , Catalytic mechanism , Activation parameters

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