期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 58, 期 -, 页码 169-175出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2013.03.058
关键词
Graphene; Adsorption; Hydroquinone; Magnetism; Freundlich; Chitosan
资金
- Shandong Provincial Natural Science Foundation of China [ZR2012BM020, ZR2012BQ018]
- Scientific and Technological Development Plan Item of Jinan City in China [201202088]
Magnetic cyclodextrin-chitosan/graphene oxide (CCGO) with high surface area was synthesized via a simple chemical bonding method. The characteristics results of FOR, SEM, TEM and XRD showed that CCGO was prepared. The large saturation magnetization (22.35 emu/g) of the synthesized nanoparticles allows fast separation of the CCGO from liquid suspension. These composites could efficiently remove hydroquinone from simulated wastewater with a facile subsequent solid-liquid separation because of their large area, abundant hydroxyl and amino groups with handy operation, and hydrophobicity. The hydroquinone removal process was found to obey the Freundlich adsorption model and its kinetics followed pseudo-second-order rate equation. The hydroquinone removal mechanism of CCGO might be attributed to the electrostatic adsorption of hydroquinone in the form of negatively charged hydroquinone by positively charged chitosan, accompanying hydroquinone absorbed by cavities of the cyclodextrin, and forming hydrogen bonds between hydroquinone and the hydroxyl groups on the surface of CCGO. The used CCGO could be recovered with ethanol. This study provides a promising nanostructured adsorbent with easy separation property for heavy metal ions removal. (C) 2013 Elsevier B.V. All rights reserved.
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