RhB Adsorption Performance of Magnetic Adsorbent Fe3O4/RGO Composite and Its Regeneration through A Fenton-like Reaction

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• 作者：Yalin Qin ; Mingce Long ; Beihui Tan ; Baoxue Zhou
• 关键词：Magnetic adsorbent ; Fe3O4 nanoparticles ; Reduced grapheme oxide ; Fenton ; likereaction ; Regeneration
• 刊名：Nano-Micro Letters
• 出版年：2014
• 出版时间：April 2014
• 年：2014
• 卷：6
• 期：2
• 页码：125-135
• 全文大小：336KB
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• 作者单位：Yalin Qin (14)
  Mingce Long (14)
  Beihui Tan (14)
  Baoxue Zhou (14)
  
  14. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
  
• 刊物类别：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
• 刊物主题：Nanotechnology and Microengineering; Nanotechnology; Nanoscale Science and Technology;
• 出版者：Springer Berlin Heidelberg
• ISSN：2150-5551

文摘

Adsorption is one of the most effective technologies in the treatment of colored matter containing wastewater. Graphene related composites display potential to be an effective adsorbent. However, the adsorption mechanism and their regeneration approach are still demanding more efforts. An effective magnetically separable absorbent, Fe₃O₄ and reduced graphene oxide (RGO) composite has been prepared by an in situ coprecipitation and reduction method. According to the characterizations of TEM, XRD, XPS, Raman spectra and BET analyses, Fe₃O₄ nanoparticles in sizes of 10-0 nm are well dispersed over the RGO nanosheets, resulting in a highest specific area of 296.2 m2/g. The rhodamine B adsorption mechanism on the composites was investigated by the adsorption kinetics and isotherms. The isotherms are fitting better by Langmuir model, and the adsorption kinetic rates depend much on the chemical components of RGO. Compared to active carbon, the composite shows 3.7 times higher adsorption capacity and thirty times faster adsorption rates. Furthermore, with Fe₃O₄ nanoparticles as the in situ catalysts, the adsorption performance of composites can be restored by carrying out a Fenton-like reaction, which could be a promising regeneration way for the adsorbents in the organic pollutant removal of wastewater. Keywords Magnetic adsorbent Fe₃O₄ nanoparticles Reduced grapheme oxide Fenton-likereaction Regeneration