dc.contributor.author | Ates, Ayten | |
dc.contributor.author | Hardacre, Christopher | |
dc.date.accessioned | 2019-07-27T12:10:23Z | |
dc.date.accessioned | 2019-07-28T10:03:51Z | |
dc.date.available | 2019-07-27T12:10:23Z | |
dc.date.available | 2019-07-28T10:03:51Z | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0021-9797 | |
dc.identifier.uri | https://dx.doi.org/10.1016/j.jcis.2012.01.017 | |
dc.identifier.uri | https://hdl.handle.net/20.500.12418/9168 | |
dc.description | WOS: 000301320300018 | en_US |
dc.description | PubMed ID: 22331036 | en_US |
dc.description.abstract | Two different natural zeolites having different phase compositions were obtained from different regions of Turkey and modified by ion-exchange (0.5 M NH4NO3) and acid leaching using 1 M HCl. The natural and modified samples were treated at low temperature (LT), high temperature (HT) and steam (ST) conditions and characterised by XRF, XRD, BET, FTIR, DR-UV-Vis, NH3-TPD and TGA. Ion-exchange with NH4+ of natural zeolites results in the exchange of the Na+ and Ca2+ cations and the partial exchange of the Fe3+ and Mg2+ cations. However, steam and acidic treatments cause significant dealumination and decationisation, as well as loss of crystalline, sintering of phases and the formation of amorphous material. The presence of mordenite and quartz phases in the natural zeolites increases the stability towards acid treatment, whereas the structure of clinoptilolite-rich zeolites is mostly maintained after high temperature and steam treatments. The natural and modified zeolites treated at high temperature and in steam were found to be less stable compared with synthetic zeolites, resulting in a loss of crystallinity, a decrease in the surface area and pore volume, a decrease in the surface acidity as well as dealumination, and decationisation. (C) 2012 Elsevier Inc. All rights reserved. | en_US |
dc.description.sponsorship | Scientific and Technological Research Council of Turkey (TUBITAK) [107M435] | en_US |
dc.description.sponsorship | This work was supported by The Scientific and Technological Research Council of Turkey (TUBITAK) under the Project Number of 107M435 as well as some experiments carried out in CenTACat School of Chemistry and Chemical Engineering at Queen's University Belfast with EU transnational programme. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | ACADEMIC PRESS INC ELSEVIER SCIENCE | en_US |
dc.relation.isversionof | 10.1016/j.jcis.2012.01.017 | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Natural zeolite | en_US |
dc.subject | Dealumination | en_US |
dc.subject | Decationisation | en_US |
dc.subject | Treatment | en_US |
dc.subject | Steaming | en_US |
dc.title | The effect of various treatment conditions on natural zeolites: Ion exchange, acidic, thermal and steam treatments | en_US |
dc.type | article | en_US |
dc.relation.journal | JOURNAL OF COLLOID AND INTERFACE SCIENCE | en_US |
dc.contributor.department | [Ates, Ayten] Cumhuriyet Univ, Dept Chem Engn, Fac Engn, TR-58140 Sivas, Turkey -- [Hardacre, Christopher] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland | en_US |
dc.contributor.authorID | Hardacre, Christopher -- 0000-0001-7256-6765 | en_US |
dc.identifier.volume | 372 | en_US |
dc.identifier.endpage | 140 | en_US |
dc.identifier.startpage | 130 | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |