Magnetically Separable and Durable MnFe2O4 for Efficient Catalytic Ozonation of Organic Pollutants

Autor:	Weijie Wen, Shuanghong Tian, Ya Xiong, Linjun Kong, Fuchuan Ding, Jun Chen
Rok vydání:	2014
Předmět:	Pollutant Ozone General Chemical Engineering Radical Inorganic chemistry General Chemistry Combustion Magnetic hysteresis Decomposition Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound chemistry Zeta potential
Zdroj:	Industrial & Engineering Chemistry Research. 53:6297-6306
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie403914r
Popis:	Magnetically separable MnFe2O4 was prepared successfully by a sol–gel combustion method. The synthesized MnFe2O4 was characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, zeta potential, and magnetic hysteresis loops. The catalytic activity of MnFe2O4 was evaluated by the ozonation of 4-chlorophenol (4-CP) at different solution pH value, ozone gas concentration, MnFe2O4 dosage, and initial 4-CP concentration. The ozone consumption was monitored and the ·OH exposure was calculated in different processes. It was found that MnFe2O4 was highly effective in catalyzing ozone decomposition and favored to generate more hydroxyl radicals. Moreover, the synergistically catalytic effect between Mn and Fe in MnFe2O4 was confirmed. Finally, lifetime of MnFe2O4 was measured in a novel integrated membrane-heterogeneous catalytic ozonation reactor designed for the first time. All the experimental results show that MnFe2O4 is a highly recoverable, effici...
Databáze:	OpenAIRE
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