Mineralization of C.I. Acid Red 14 azo dye by UV/Fe-ZSM5/H2O2, process.
The zeolite Fe-ZSM5 was applied as a heterogeneous catalyst in the photo-Fenton process for mineralization of azo dye Acid Red 14 (AR14). Under optimal conditions (20 mM of H2O2 0.25 g L(-1) of catalyst and initial natural pH of the solution) 76% of total organic carbon (TOC) of a solution containing 40 mg L(-1) of the dye could be removed after 120 min in a 1.0 L tubular, closed-circulation batch photoreactor. Leaching tests and comparative experiments indicated that the application of the heterogeneous catalyst could increase the photo-Fenton process efficiency. A kinetic model was developed for this process and showed that the dye mineralization rate obeyed the pseudo-first order kinetic when the initial concentration of the dye was low. It was also observed that the catalytic behaviour of Fe-ZSM5 could be reproduced in consecutive experiments without a considerable drop in the process efficiency. Estimation of electrical energy consumption (EE/O) of the process as a function of mineralization efficiency revealed that the UV/Fe-ZSM5/H2O2 process not only increased the mineralization efficiency of the process, but also decreased the cost of electrical energy consumed by the process.
Kasiri
Masoud B
MB
Laboratoire de Génie des Procédés Traitement des Effluents, Ecole Nationale Supérieure de Chimie de Mulhouse, Université de Haute Alsace, 3 rue Alfred Werner, 68093 Mulhouse, France. masoud.bagherzadeh-kasiri@uha.fr
Aleboyeh
Hamid
H
Aleboyeh
Azam
A
D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D055668:Photochemical Processes; D010777:Photochemistry / Q000379:methods*; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
C469409:Acid red 14; D001391:Azo Compounds; C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D017641:Zeolites; D006861:Hydrogen Peroxide; D007501:Iron