Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics
✍ Scribed by Mehmet Emin Argun; Mustafa Karatas
- Publisher
- American Institute of Chemical Engineers
- Year
- 2010
- Tongue
- English
- Weight
- 232 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1944-7442
- DOI
- 10.1002/ep.10504
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The decolorization and degradation efficiency of the azo dye Reactive Black 5 (RB5) by Fenton system were investigated in this study. The operation parameters such as Fe^2+^:H~2~O~2~ ratio, pH value, initial concentration of RB5, reaction time, and temperature were examined. Maximum decolorization (99%) and degradation (88% COD removal) efficiencies were achieved at the Fe^2+^:H~2~O~2~ ratio of 0.05 and pH 3 for 15‐min reaction time. The decolorization kinetic of RB5 followed pseudo‐second‐order reaction kinetic. The increase of temperature caused decreasing of obtained rate constants and increasing of corresponding half‐lives. The article also discussed thermodynamic parameters including changes in Gibbs free energy, enthalpy, and entropy for the decolorization of RB5 by Fenton and exposed that the oxidation process was spontaneous and exothermic under natural conditions. © 2010 American Institute of Chemical Engineers Environ Prog, 2010