Efficiently removing cetyl trimethyl ammonium bromide from wastewater by graphene oxide |
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| Authors: | Luping Chang Yijun Cao Weijun Peng Chao Li Guixia Fan Xiangyu Song Xiaoxin Shi |
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| Affiliation: | 1. School of Chemical Engineering, Zhengzhou University, Zhengzhou, China;2. Henan Province Industrial Technology Research Institute of Resources and Materials, Zhengzhou University, Zhengzhou, China |
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| Abstract: | Cetyl trimethyl ammonium bromide (CTAB) containing wastewater from dressing plant may pose a detrimental threaten to mineral beneficiation and environment. The adsorption of CTAB in aqueous solutions by graphene oxide (GO) has been studied in this work. X-ray diffraction, X-ray photoelectron spectroscopy, Fourier-transform infrared spectrometer, and atomic force spectroscopy were used to characterize GO. The results indicated that the adsorption followed the Freundlich model could be well described by pseudo-second order kinetic model. The adsorption capacity was much bigger than activated carbon and many natural clay minerals. The adsorption process was endothermic, and the adsorption mechanism of CTAB onto GO was proven to be controlled by surface complexation, hydrogen bonding, and electrostatic attraction. |
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| Keywords: | adsorption mechanism cetyl trimethyl ammonium bromide graphene oxide |
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