Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey)
Physicochemical characterization of the natural solid-phase Gördes clinoptilolite and of the Na + -, K + -, Ca 2+ - and Mg 2+ -modified forms of the mineral (as obtained through ion-exchange) by batch methods, X-ray diffractometry (XRD), X-ray fluorescence (XRF), infrared spectroscopy (IR) and scann...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SAGE Publications
2009-07-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.27.6.615 |
| _version_ | 1797283100183494656 |
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| author | Tevfik Ünaldı Önder Orhun Selahattin Kadir |
| author_facet | Tevfik Ünaldı Önder Orhun Selahattin Kadir |
| author_sort | Tevfik Ünaldı |
| collection | DOAJ |
| description | Physicochemical characterization of the natural solid-phase Gördes clinoptilolite and of the Na + -, K + -, Ca 2+ - and Mg 2+ -modified forms of the mineral (as obtained through ion-exchange) by batch methods, X-ray diffractometry (XRD), X-ray fluorescence (XRF), infrared spectroscopy (IR) and scanning electron microscopy (SEM) is described. It was found that the Na + - and Ca 2+ -forms exhibit high ion-exchange rates relative to the Mg 2+ - and K + -forms. In addition, the high rate of ion selectivity towards Na + and K + ions, together with lower rates for Mg 2+ and Ca 2+ ions, indicate that the rate of ion selectivity is negatively correlated with the ionic potential of the ions. Such ion-exchange and ion selectivity result in a decrease in pore size and an increase in the surface area of the modified clinoptilolite relative to the natural form; this may possibly be related to the entrance of the ions into the mineral structure. It was concluded that clinoptilolite modified with exchangeable ions from aqueous solutions at two different normalities exhibits features which differ from those of natural clinoptilolite. Thus, modification of clinoptilolite by different cationic forms from aqueous solutions at different normalities might prove suitable for applications in other fields of study. |
| first_indexed | 2024-03-07T17:25:19Z |
| format | Article |
| id | doaj.art-717139e388e54c7eb48a04be5b907d04 |
| institution | Directory Open Access Journal |
| issn | 0263-6174 2048-4038 |
| language | English |
| last_indexed | 2024-03-07T17:25:19Z |
| publishDate | 2009-07-01 |
| publisher | SAGE Publications |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj.art-717139e388e54c7eb48a04be5b907d042024-03-02T19:15:38ZengSAGE PublicationsAdsorption Science & Technology0263-61742048-40382009-07-012710.1260/0263-6174.27.6.615Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey)Tevfik Ünaldı0Önder Orhun1Selahattin Kadir2 Department of Physics, Eskisehir Osmangazi University, TR-26480 Eskisehir, Turkey Department of Physics, Anadolu University, TR-26470 Eskisehir, Turkey Department of Geological Engineering, Eskisehir Osmangazi University, TR-26480 Eskisehir, TurkeyPhysicochemical characterization of the natural solid-phase Gördes clinoptilolite and of the Na + -, K + -, Ca 2+ - and Mg 2+ -modified forms of the mineral (as obtained through ion-exchange) by batch methods, X-ray diffractometry (XRD), X-ray fluorescence (XRF), infrared spectroscopy (IR) and scanning electron microscopy (SEM) is described. It was found that the Na + - and Ca 2+ -forms exhibit high ion-exchange rates relative to the Mg 2+ - and K + -forms. In addition, the high rate of ion selectivity towards Na + and K + ions, together with lower rates for Mg 2+ and Ca 2+ ions, indicate that the rate of ion selectivity is negatively correlated with the ionic potential of the ions. Such ion-exchange and ion selectivity result in a decrease in pore size and an increase in the surface area of the modified clinoptilolite relative to the natural form; this may possibly be related to the entrance of the ions into the mineral structure. It was concluded that clinoptilolite modified with exchangeable ions from aqueous solutions at two different normalities exhibits features which differ from those of natural clinoptilolite. Thus, modification of clinoptilolite by different cationic forms from aqueous solutions at different normalities might prove suitable for applications in other fields of study.https://doi.org/10.1260/0263-6174.27.6.615 |
| spellingShingle | Tevfik Ünaldı Önder Orhun Selahattin Kadir Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) Adsorption Science & Technology |
| title | Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) |
| title_full | Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) |
| title_fullStr | Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) |
| title_full_unstemmed | Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) |
| title_short | Physicochemical Characterization of Natural and Na-, K-, Ca- and Mg-modified Clinoptilolite from Gördes (Manisa, Turkey) |
| title_sort | physicochemical characterization of natural and na k ca and mg modified clinoptilolite from gordes manisa turkey |
| url | https://doi.org/10.1260/0263-6174.27.6.615 |
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