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Chemosphere

Title:		An experimental and theoretical study of the adsorption removal of toluene and chlorobenzene on coconut shell derived carbon
Author(s):		Zhao X; Zeng X; Qin Y; Li X; Zhu T; Tang X;
Address:		"School of Space and Environment, Beihang University, Beijing, 100191, PR China. School of Space and Environment, Beihang University, Beijing, 100191, PR China. Electronic address: xiangli@buaa.edu.cn. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China"
Journal Title:		Chemosphere
Year:		2018
Volume:		20180426
Issue:
Page Number:		285 - 292
DOI:		10.1016/j.chemosphere.2018.04.126
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"The adsorption performance of toluene and chlorobenzene on prepared coconut shell derived carbon (CDC) is investigated and compared with commercial activated carbon (CAC) by experiment and theory calculation. Textural properties of prepared adsorbents are characterized by N(2) adsorption, infrared spectra (FT-IR), Raman spectra and X-ray photoelectron spectra (XPS). Adsorption isotherms of toluene and chlorobenzene are obtained and fitted using structure optimizations, Grand Canonical Monte Carlo (GCMC) simulation and thermodynamic models. The results indicate that CDC shows better volatile organic compounds (VOCs) removal performance than CAC, and chlorobenzene is easily adsorbed than toluene. On the aspect of textural characteristics, CDC possesses more micropores ratio and narrower pore size distribution than CAC. Furthermore, amounts of electron-withdrawing carbonyl groups on the CAC surface reduce the electron density of adsorbents, thus weakening the interaction between VOCs and adsorbents. On the aspect of model fitting, the Yoon and Nelson (Y-N) and Dubinin-Astakhov (D-A) models can well describe the dynamic adsorption and the adsorption equilibrium of toluene and chlorobenzene on CDC respectively. It is believed that substituent groups of adsorbates, making the charge distribution deviate, lead to adsorption potentials of chlorobenzene larger than toluene. In general, both the pore structure and the surface property of adsorbents affect the VOCs adsorption behaviors on CDC"
Keywords:		Adsorption Carbon/*chemistry Chlorobenzenes/*chemistry Cocos/*chemistry Toluene/*chemistry Adsorption isotherm Aromatic VOCs Coconut shell derived carbon D-A model Theory calculation;
Notes:		"MedlineZhao, Xiaoyan Zeng, Xiaolan Qin, Yu Li, Xiang Zhu, Tianle Tang, Xiaolong eng England 2018/05/13 Chemosphere. 2018 Sep; 206:285-292. doi: 10.1016/j.chemosphere.2018.04.126. Epub 2018 Apr 26"