Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2026
Title: Kinetic and thermodynamic investigations of strontium ions retention by natural kaolinite and clinoptilolite minerals
Authors: Akar, Dilek
Shahwan, Talal
Eroğlu, Ahmet Emin
Keywords: Clinoptilolite
Kaolinite
Sorption
Issue Date: 2005
Publisher: Walter De Gruyter Gmbh
Source: Akar, D., Shahwan, T., and Eroğlu, A. E. (2005). Kinetic and thermodynamic investigations of strontium ions retention by natural kaolinite and clinoptilolite minerals. Radiochimica Acta, 93(8), 477-485. doi:10.1524/ract.2005.93.8.477
Abstract: The current study was devoted to the determination of various thermodynamic and kinetic parameters resulting from the fixation of Sr2+ by natural samples of kaolinite and clinoptilolite minerals. The sorption process followed pseudo second order kinetics, with faster sorption on kaolinite compared to clinoptilolite, where the uptake is affected by intraparticle diffusion. Freundlich and Dubinin-Radushkevich isotherm models described the data more adequately than Langmuir model, and clinoptilolite showed a higher strontium sorption capacity than kaolinite. Thermodynamically, the activation energy of Sr2+ sorption by kaolinite and clinoptilolite were respectively, -8.5 and -18.4 kJ/mol. The sorption process on both minerals was spontaneous and endothermic at all the studied concentrations, with ΔH° being 11.3 and 9.8 kJ/mol, for sorption on kaolinite and clinoptilolite, respectively. The findings of this study were compared with those of an earlier study on the uptake of Cs+ by the same minerals.
URI: http://doi.org/10.1524/ract.2005.93.8.477
http://hdl.handle.net/11147/2026
ISSN: 0033-8230
0033-8230
Appears in Collections:Chemistry / Kimya
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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