Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5515
Title: Kinetic and equilibrium studies of adsorption of ß-glucuronidase by clinoptilolite-rich minerals
Authors: Demirbüker Kavak, Dilek
Ülkü, Semra
Demirbüker Kavak, Dilek
Ülkü, Semra
Izmir Institute of Technology. Chemical Engineering
Keywords: Adsorption
Clinoptilolite
Kinetic studies
β-Glucuronidase enzyme
Issue Date: Feb-2015
Publisher: Elsevier Ltd.
Source: Demirbüker Kavak, D., and Ülkü, S. (2015). Kinetic and equilibrium studies of adsorption of β-glucuronidase by clinoptilolite-rich minerals. Process Biochemistry, 50(2), 221-229. doi:10.1016/j.procbio.2014.12.013
Abstract: The adsorption of the bacterial β-glucuronidase (GUS) enzyme, which is thought to be responsible for the production of reactive metabolites related to some diseases and cancer development, by clinoptilolite-rich mineral was investigated. Batch experiments were performed to analyze of the effects of the clinoptilolite amount and particle size, initial GUS concentration, shaking rate, pH and temperature on the adsorption equilibrium and kinetics. Adsorption equilibrium data were interpreted in terms of Langmuir and Freundlich isotherms; and they were well represented by the Langmuir isotherm model. The percentage of GUS removal by the clinoptilolite-rich mineral was changed in the range of 9.4-54.4% depending on its initial concentration. The kinetic data were analyzed using external film diffusion, intraparticle diffusion, pseudo-first-order and pseudo-second-order models and both external film and intraparticle diffusion appeared to be effective in GUS adsorption. Thermodynamic studies indicated that GUS adsorption is exothermic, physical and spontaneous at the temperatures investigated (288-310 K)
URI: http://doi.org/10.1016/j.procbio.2014.12.013
http://hdl.handle.net/11147/5515
ISSN: 0032-9592
1359-5113
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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