Adsorption of Zn(II) on graphene oxide prepared from low‐purity of amorphous graphite |
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| Authors: | Qiang Yang Guangcheng Yang Weijun Peng Shaoxian Song |
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| Institution: | 1. School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei, China;2. Hubei Provincial Collaborative Innovation Center for High Efficient Utilization of Vanadium Resources, Wuhan University of Technology, Wuhan, Hubei, China;3. Hubei Key Laboratory of Mineral Resources Processing and Environment, Wuhan University of Technology, Wuhan, Hubei, China |
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| Abstract: | The adsorption of Zn(II) in aqueous solutions on graphene oxide (GO) prepared from low‐purity of natural amorphous graphite has been studied in this work. The study was performed through the measurements of Zeta potential, atomic force microscope, Fourier transform infrared spectrum and X‐ray photoelectron spectroscopy. The results indicated that the adsorption followed the Langmuir model with the maximum Zn(II) adsorption capacity of 73 mg/g at pH 7.0. In addition, the adsorption was well described by the pseudo‐second‐order kinetics model. The mechanism of the Zn(II) adsorption on GO was mainly attributed to chemical adsorption through complexation reaction between Zn(II) and hydroxyl or carboxyl groups on the GO sheets, while the electrostatic interaction also contribute to the whole interaction. Copyright © 2016 John Wiley & Sons, Ltd. |
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| Keywords: | graphene oxide amorphous graphite zinc ions adsorption |
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