Reactive adsorption of methylene blue on montmorillonite via an ESI-MS study

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• 作者：Francisco G.E. Nogueira ; Joã ; o H. Lopes ; Adilson C. Silva ; Maraisa Gonç ; alves ; Alex ; re S. Anastá ; cio ; Karim Sapag ; Luiz C.A. Oliveira
• 关键词：Montmorillonite ; Organic contaminants ; Adsorption ; ESI-MS
• 刊名：Applied Clay Science
• 出版年：2009
• 出版时间：February 2009
• 年：2009
• 卷：43
• 期：2
• 页码：190-195
• 全文大小：1157 K

文摘

Catalytic and adsorptive behaviors of montmorillonite to remove methylene blue were investigated. The clay mineral showed high activity for the oxidation of methylene blue in presence of H₂O₂ and on removing the organic substrate through reactive adsorption as evidenced from Electrospray Ionization Mass Spectrometry (ESI-MS) data. Montmorillonite was characterized by atomic absorption, powder X-ray diffractometry, scanning electron microscopy coupled with energy dispersive spectroscopy, infra-red spectroscopy and surface area analyses. Results indicated a highly reactive surface with can be regenerated by H₂O_2, promoting heterogeneous catalytic reaction to oxidize organic compounds from aqueous medium without any previous treatment of the montmorillonite.