Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration.
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Publication Date
2019-04Journal Title
Chemosphere
ISSN
0045-6535
Publisher
Elsevier
Volume
220
Pages
422-431
Language
eng
Type
Article
This Version
AM
Physical Medium
Print-Electronic
Metadata
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Zhang, Y., Jin, F., Shen, Z., Wang, F., Lynch, R., & 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, 220 422-431. https://doi.org/10.1016/j.chemosphere.2018.12.170
Abstract
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.
Keywords
Zeolites, Methyl Ethers, Water Purification, Adsorption, Groundwater
Sponsorship
CSC
Identifiers
External DOI: https://doi.org/10.1016/j.chemosphere.2018.12.170
This record's URL: https://www.repository.cam.ac.uk/handle/1810/287653
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