Kinetic and equilibrium modelling of MTBE (Methyl tert-butyl ether) adsorption on ZSM-5 zeolite: batch and column studies

Zhang, Y., Jin, F. , Shen, Z., Lynch, R. and Al-Tabbaa, A. (2018) Kinetic and equilibrium modelling of MTBE (Methyl tert-butyl ether) adsorption on ZSM-5 zeolite: batch and column studies. Journal of Hazardous Materials, 347, pp. 461-469. (doi:10.1016/j.jhazmat.2018.01.007) (PMID:29353191)

Zhang, Y., Jin, F. , Shen, Z., Lynch, R. and Al-Tabbaa, A. (2018) Kinetic and equilibrium modelling of MTBE (Methyl tert-butyl ether) adsorption on ZSM-5 zeolite: batch and column studies. Journal of Hazardous Materials, 347, pp. 461-469. (doi:10.1016/j.jhazmat.2018.01.007) (PMID:29353191)

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Abstract

The intensive use of methyl tert-butyl ether (MTBE) as a gasoline additive has resulted in serious environmental problems due to its high solubility, volatility and recalcitrance. The feasibility of permeable reactive barriers (PRBs) with ZSM-5 type zeolite as a reactive medium was explored for MTBE contaminated groundwater remediation. Batch adsorption studies showed that the MTBE adsorption onto ZSM-5 follows the Langmuir model and obeys the pseudo-second-order model with an adsorption capacity of 53.55 mg·g-1. The adsorption process reached equilibrium within 24 h, and MTBE was barely desorbed with initial MTBE concentration of 300 mg·L-1. The mass transfer process is found to be primarily controlled by pore diffusion for MTBE concentrations from 100 to 600 mg·L-1. pH has little effect on the maximum adsorption capacity in the pH range of 2-10, while the presence of nickel reduces the capacity with Ni concentrations of 2.5-25 mg·L-1. In fixed-bed column tests, the Dose-Response model fits the breakthrough curve well, showing a saturation time of ~320 min and a removal capacity of ~18.71 mg·g-1 under the conditions of this study. Therefore, ZSM-5 is an extremely effective adsorbent for MTBE removal and has a huge potential to be used as a reactive medium in PRBs.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Jin, Dr Fei
Authors: Zhang, Y., Jin, F., Shen, Z., Lynch, R., and Al-Tabbaa, A.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Journal of Hazardous Materials
Publisher:Elsevier
ISSN:0304-3894
ISSN (Online):1873-3336
Published Online:10 January 2018
Copyright Holders:Copyright © 2018 Elsevier
First Published:First published in Journal of Hazardous Materials 347:461-469
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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