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    Title: Effect of the iron oxide catalyst on o-toluidine oxidation by the fluidized-bed Fenton process
    Authors: Su, Chia-Chi
    Fan, Chun-Cheng
    Anotai, Jin
    Lu, Ming-Chun
    Contributors: 環境資源管理系
    Keywords: fluidized-bed Fenton process
    iron oxide
    ferrous ions
    Fenton-like process
    Date: 2014-01
    Issue Date: 2015-05-06 21:20:22 (UTC+8)
    Publisher: Taylor & Francis Ltd
    Abstract: This study investigates the effects of the Fe2+ concentration and synthetic iron oxide catalysts on o-toluidine degradation using a fluidized-bed Fenton process. The mineralization of o-toluidine in the synthetic catalyst system is also examined. The H3.5 and H7.3 Fe/SiO2 and A7.8 and A12.5 Fe/SiO2 catalysts were successfully synthesized by adding H2O2 and injecting air process, respectively. The optimum initial ferrous ion concentration for degradation of 1mM o-toluidine was 1 mM. Experimental results reveal that 1mM o-toluidine can be 100% degraded at 60 and 120min in the modified fluidized-bed Fenton process with A7.8 Fe/SiO2 and the conventional fluidized-bed Fenton process with SiO2 carrier, respectively, when the optimum conditions of 1mM Fe2+ and 17mM H2O2 at pH 3 were used. The A7.8 Fe/SiO2 catalyst had a stronger oxidation ability than the H3.5 Fe/SiO2, H7.3 Fe/SiO2 and A12.5 Fe/SiO2 catalysts, and was attributed to the high iron content on the surface of the SiO2 support. The Fenton and Fenton-like reactions occurred in the A7.8 Fe/SiO2 catalyst system. Degradation of o-toluidine in the Fenton-like process follows pseudo-first-order kinetics. The A7.8 Fe/SiO2 catalyst efficiently enhanced o-toluidine oxidation under the pH range of 2-4.
    Relation: Environmental Technology, v.35 n.1, pp.89-94
    Appears in Collections:[Dept. of Environmental Resources Management] Periodical Articles

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