Ion exchange and adsorption equilibrium studies on clinoptilolite, bentonite and vermiculite

Inglezakis, VJ; Stylianou, M; Loizidou, M

dc.contributor.author	Inglezakis, VJ	en
dc.contributor.author	Stylianou, M	en
dc.contributor.author	Loizidou, M	en
dc.date.accessioned	2014-03-01T01:33:40Z
dc.date.available	2014-03-01T01:33:40Z
dc.date.issued	2010	en
dc.identifier.issn	0022-3697	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20528
dc.subject	A. Microporous materials	en
dc.subject	D. Thermodynamic properties	en
dc.subject.classification	Chemistry, Multidisciplinary	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	A. Microporous materials	en
dc.subject.other	Adsorption energies	en
dc.subject.other	Adsorption equilibria	en
dc.subject.other	Adsorption potential	en
dc.subject.other	BET analysis	en
dc.subject.other	Clinoptilolites	en
dc.subject.other	D. Thermodynamic properties	en
dc.subject.other	Dubinin-astakhov	en
dc.subject.other	Environmental applications	en
dc.subject.other	Experimental data	en
dc.subject.other	Ion exchange process	en
dc.subject.other	Natural minerals	en
dc.subject.other	Physical parameters	en
dc.subject.other	Zeolite clinoptilolite	en
dc.subject.other	Adsorption	en
dc.subject.other	Adsorption isotherms	en
dc.subject.other	Bentonite	en
dc.subject.other	Clay minerals	en
dc.subject.other	Ion exchange	en
dc.subject.other	Ion exchangers	en
dc.subject.other	Ions	en
dc.subject.other	Lead	en
dc.subject.other	Microporosity	en
dc.subject.other	Thermodynamic properties	en
dc.subject.other	Zeolites	en
dc.subject.other	Microporous materials	en
dc.title	Ion exchange and adsorption equilibrium studies on clinoptilolite, bentonite and vermiculite	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.jpcs.2009.12.077	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.jpcs.2009.12.077	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	In the present paper three natural minerals used in many industrial and environmental applications namely zeolite clinoptilolite and the clays bentonite and vermiculite are studied by utilising ion exchange and adsorption. In particular, the Dubinin-Astakhov adsorption isotherm is used modified by introducing a solubility-normalized adsorption potential for studying the ion exchange process. The equation, is applied in experimental isotherms in order to determine adsorption energy and heterogeneity parameter for the ion exchange of Pb2+ in the natural minerals. The results indicate that the modified Dubinin-Astakhov adsorption isotherm represents the experimental data well and at the same time provides the heterogeneity parameter of the materials, which is an important adsorbent physical parameter as well as the adsorption energy. In order to deepen the study and link the results to the pore structure BET analysis is presented as well. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Journal of Physics and Chemistry of Solids	en
dc.identifier.doi	10.1016/j.jpcs.2009.12.077	en
dc.identifier.isi	ISI:000276011400023	en
dc.identifier.volume	71	en
dc.identifier.issue	3	en
dc.identifier.spage	279	en
dc.identifier.epage	284	en