Journal
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
Volume 13, Issue -, Pages -Publisher
BMC
DOI: 10.1186/s40201-015-0162-6
Keywords
Reactive red 141; Heterogeneous Fenton-like oxidation; Fe-ZSM-5 zeolite catalyst
Categories
Funding
- TUBITAK (The Scientific and Technological Research Council of Turkey) [108 M175]
- Ege University Scientific Research Fund [08MUH023]
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In this study, the heterogeneous Fenton-like degradation of Reactive Red 141 (RR141) in water was investigated over iron containing ZSM-5 zeolite (Si/Al = 42) prepared by ion-exchange (FeZSM-5 (42)). The catalyst was characterized by XRD, SEM, FTIR, TPR, and ICP-AES measurements. The effects of the initial concentrations of the dye and H2O2, the initial pH of the solution, catalyst loading, and the reaction temperature were investigated on heterogeneous Fenton-like degradation of RR141. The reduction of the solution initial pH from ca. 7.0 to ca. 3.5 had a positive effect on color removal. A complete color removal was achieved with all the H2O2 concentrations in the range of 0.007 - 0.067 M over the FeZSM-5 (42) catalyst after 2 h of reaction. The COD reduction increased from 52% to 81% with an increase in the amount of the catalyst. The COD reduction was affected positively with the increase in temperature from 298 K through 313 K to 323 K and then to 333 K. The initial decolorization rate was described by the equation: -r(A0) = 9.4*10(4) e(-38.8/RT) C-RR141,C-0 C-H2O2,0(0.184) with an H2O2 concentration range of 0.007 M - 0.033 M (where R is in kJ/mol).
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