NDLI: Heterogeneous activation of hydrogen peroxide using γ-Al<sub>2</sub>O<sub>3</sub> supported bimetallic Fe, Mn for the degradation of reactive black 5

Content Provider	Royal Society of Chemistry (RSC)
Author	Wang, Jianfei Zou, Haimin Xie, Yue Wang, Yan
Copyright Year	2016
Abstract	A Fe–Mn/γ-Al2O3 catalyst was prepared via a wet impregnation method and used for the degradation of reactive black 5 (RB5) as an activator of hydrogen peroxide (H2O2). The prepared catalyst was characterized using XRD, FTIR and SEM-EDS. The results show that γ-Al2O3 can effectively restrain Fe and Mn. The catalytic activity of Fe–Mn/γ-Al2O3 was significantly higher than that of pure γ-Al2O3, Fe/γ-Al2O3 and Mn/γ-Al2O3. After four reuse cycles, Fe–Mn/γ-Al2O3 maintained a high catalytic activity and approximately 98% of the color removal was reached after 75 min reaction. The effects of important operational parameters, such as the initial pH of solution, H2O2 amount and catalyst addition on the decolorization efficiency, were investigated. The results displayed that the RB5 discoloration efficiency initially increased and then decreased with increasing H2O2 concentration and pH, as well as initially increasing and then maintaining stability with increasing catalyst addition. The best decolorization efficiency (98.02%) was obtained with the following parameters: pH = 3, H2O2 amount = 7 mmol L−1 and catalyst addition = 2.5 g L−1 for an initial RB5 concentration of 50 mg L−1. Finally, the TOC removal was only 39.60% after 75 min of reaction, by prolonging the reaction time to 160 min, 62.23% of TOC removal can be achieved under the optimal operational parameters.
Starting Page	15394
Ending Page	15401
Page Count	8
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	6
Issue Number	19
Journal	RSC Advances
DOI	10.1039/c5ra22128e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	X-ray crystallography Hydrogen peroxide
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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