Premium
Application of Fenton process for decolorization of reactive black 5 from synthetic wastewater: Kinetics and thermodynamics
Author(s) -
Argun Mehmet Emin,
Karatas Mustafa
Publication year - 2011
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.10504
Subject(s) - exothermic reaction , gibbs free energy , enthalpy , chemistry , kinetics , thermodynamics , wastewater , exothermic process , activation energy , kinetic energy , degradation (telecommunications) , chemical engineering , nuclear chemistry , adsorption , waste management , organic chemistry , telecommunications , physics , quantum mechanics , computer science , engineering
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