Adsorption of Methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: fixed-bed column tests, breakthrough curve modelling and regeneration

Zhang, Y., Jin, F. , Shen, Z., Wang, F., Lynch, R. and Al-Tabbaa, A. (2019) Adsorption of Methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: fixed-bed column tests, breakthrough curve modelling and regeneration. Chemosphere, 220, pp. 422-431. (doi:10.1016/j.chemosphere.2018.12.170) (PMID:30594793)

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ZSM-5, as a hydrophobic zeolite, has a good adsorption capacity for methyl tert-butyl ether (MTBE) in batch adsorption studies. This study explores the applicability of ZSM-5 as a reactive material in permeable reactive barriers (PRBs) to decontaminate the MTBE-containing groundwater. A series of laboratory scale fixed-bed column tests were carried out to determine the breakthrough curves and evaluate the adsorption performance of ZSM-5 towards MTBE under different operational conditions, including bed length, flow rate, initial MTBE concentration and ZSM-5 dosage, and regeneration tests were carried out at 80, 150 and 300°C for 24 h. Dose-Response model was found to best describe the breakthrough curves. MTBE was effectively removed by the fixed-bed column packed with a ZSM-5/sand mixture with an adsorption capacity of 31.85 mg∙g-1 at 6 cm bed length, 1 mL∙min-1 flow rate, 300 mg∙L-1 initial MTBE concentration and 5% ZSM-5 dosage. The maximum adsorption capacity increased with the increase of bed length and the decrease of flow rate and MTBE concentration. The estimated kinetic parameters can be used to predict the dynamic behaviour of column systems. In addition, regeneration study shows that the adsorption capacity of ZSM-5 remains satisfactory (>85%) after up to four regeneration cycles.

Item Type:Articles
Additional Information:The first author would like to thank China Scholarship Council (CSC) for providing the PhD studentship, and the third author is grateful to the Killam Trusts of Canada for the Izaak Walton Killam Memorial Postdoctoral Fellowship.
Glasgow Author(s) Enlighten ID:Jin, Dr Fei
Authors: Zhang, Y., Jin, F., Shen, Z., Wang, F., Lynch, R., and Al-Tabbaa, A.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:Chemosphere
ISSN (Online):1879-1298
Published Online:24 December 2018
Copyright Holders:Copyright © 2018 Elsevier Ltd.
First Published:First published in Chemosphere 220: 422-431
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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