Citation: LI Bing-zheng, WU Hui-yuan, YANG Ying-chao, QIAO Xue-zhu, XUE Yong-bing, ZHENG Wei, ZHANG Chan, SUN De-kui. Adsorptive behaviors of phenol in water by MWCNT modified by ZnCl₂, KOH and HNO₃[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(6): 761-768. shu

Adsorptive behaviors of phenol in water by MWCNT modified by ZnCl₂, KOH and HNO₃

1.
School of Environment & Safety, Taiyuan University of Science & Technology, Taiyuan 030024, China
2.
School of Chemical & Biological Technology, Taiyuan University of Science & Technology, Taiyuan 030021, China
3.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Corresponding author: LI Bing-zheng, lbzh2001@163.com
Received Date: 10 February 2020
Revised Date: 22 May 2020

Fund Project: The project was supported by the Research Project Supported by Shanxi Scholarship Council of China (2014-059) and the Doctorate Science Fund of Taiyuan University of Science & Technology (20182057)the Research Project Supported by Shanxi Scholarship Council of China 2014-059the Doctorate Science Fund of Taiyuan University of Science & Technology 20182057

Figures(8)

The texture and surface chemistry of carbon nanotubes before and after chemical treatment using ZnCl₂, KOH and HNO₃ were determined by scanning electronic microscope, X-ray diffraction, N₂ adsorption, and Boehm titration; and the effect of adsorptive conditions (contact time, initial concentration and temperature) on phenol removal and the thermodynamic and kinetic behavior and adsorption mechanism were investigated by tests and data fitting with three kinetic models (pseudo-first order, pseudo-second order and the Elovich kinetic equations) as well as thermodynamic equation. The results show that the treatment by HNO₃, ZnCl₂ or KOH less changes the BET surface area of carbon nanotubes, but obviously changes the surface chemical property. Specifically, the treatment by HNO₃ obviously enhances surface acidic groups and slightly increases basic groups, whereas the treatment by ZnCl₂ or KOH greatly decreases surface carboxyl groups and lactonic groups but obviously increases surface basic groups, which affects the phenol removal by carbon nanotubes. It is found that the phenol removal by carbon nanotubes treated with ZnCl₂ or KOH increases due to a decrease in surface carboxyl groups of carbon nanotubes, but HNO₃ treatment slightly reduces the phenol removal possibly because the adsorption is influenced by both structure and surface chemical property. Moreover, the adsorption of phenol by carbon nanotubes is spontaneous, exothermic and physically controlled, and the adsorption process of phenol by carbon nanotubes complies with the pseudo-second order equation.
- carbon nanotube,
- chemical treatment,
- phenol,
- adsorption,
- modeling
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Adsorptive behaviors of phenol in water by MWCNT modified by ZnCl2, KOH and HNO3

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通讯作者: 陈斌, bchen63@163.com

Adsorptive behaviors of phenol in water by MWCNT modified by ZnCl₂, KOH and HNO₃