Adsorbent for hydroquinone removal based on graphene oxide functionalized with magnetic cyclodextrin–chitosan

来自 dx.doi.org

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188

作者：

L Li，L Fan，S Min，H Qiu，X Li，H Duan，C Luo

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摘要：

Magnetic cyclodextrin–chitosan/graphene oxide (CCGO) with high surface area was synthesized via a simple chemical bonding method. The characteristics results of FTIR, SEM, \{TEM\} and \{XRD\} showed that \{CCGO\} was prepared. The large saturation magnetization (22.35emu/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.

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关键词：

Graphene Adsorption Hydroquinone Magnetism Freundlich Chitosan

DOI：

10.1016/j.ijbiomac.2013.03.058

被引量：

221

年份：

2013