Degradation of Methylene Blue by Heterogeneous Fenton Reaction Using Titanomagnetite at Neutral pH Values: Process and Affecting Factors

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• 作者：Shijian Yang ; Hongping He ; Daqing Wu ; Dong Chen ; Yuehong Ma ; Xiaoli Li ; Jianxi Zhu ; Peng Yuan
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2009
• 出版时间：November 18, 2009
• 年：2009
• 卷：48
• 期：22
• 页码：9915-9921
• 全文大小：299K
• 年卷期：v.48,no.22(November 18, 2009)
• ISSN：1520-5045

文摘

In this work, titanomagnetite was used as a heterogeneous Fenton catalyst for the degradation of methylene blue (MB). The degradation of MB on synthetic titanomagnetite at neutral pH values was studied in comparison with the adsorption of MB on titanomagnetite using UV−vis, FTIR, and the analyses of element C on titanomagnetite and DOC in reaction solution. Meanwhile, important factors affecting catalytic activity were investigated, that is, titanomagnetite load, H₂O₂ concentration, and reaction temperature. Titanomagnetite decomposed H₂O₂ yielding highly reactive hydroxyl radicals, and MB adsorbed on titanomagnetite was degraded. With the increases of titanomagnetite load, H₂O₂ concentration, and reaction temperature, the degradation of MB was promoted. Moreover, titanomagnetite was proved to be durable with a stable MB removal efficiency after five consecutive cycles.