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Decolorization of Methylene Blue by Persulfate Activated with FeO Magnetic Particles
Author(s) -
Hung ChangMao,
Chen ChiuWen,
Liu YiYuan,
Dong ChengDi
Publication year - 2016
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143016x14609975746848
Subject(s) - persulfate , methylene blue , catalysis , chemistry , scanning electron microscope , analytical chemistry (journal) , iron oxide , environmental scanning electron microscope , catalytic oxidation , nuclear chemistry , particle size , inorganic chemistry , materials science , photocatalysis , chromatography , biochemistry , organic chemistry , composite material
In this study, the degradation of methylene blue (MB) was conducted to evaluate the feasibility of using persulfate oxidation activated with iron oxide (FeO) magnetic particles. The results demonstrated that the decolorization rate of MB increased with increasing FeO concentration, exhibiting maximum efficiency at pH 0 3.0. The kinetics of MB was studied in the binary FeO catalyst and persulfate oxidation system. The surface properties of FeO before and after reaction was analyzed using cyclic voltammogram (CV), three‐dimensional excitation‐emission fluorescence matrix (EEFM) spectroscopy, zeta potential, particle size distribution measurements, X‐ray diffraction (XRD) and environmental scanning electron microscopy‐energy dispersive X‐ray spectrometry (ESEM‐EDS). The CV data indicated that a reversible redox reaction holds the key to explaining the significant activity of the catalyst. EEFM was used to evaluate the catalyst yield of FeO by fluorescence intensity plots with excitation/emission at 220/300 nm and 260/300 nm. The XRD and ESEM‐EDS results confirmed the presence of FeO in the catalyst.