Ion exchange of Pb2+, Cu2+, Fe3+, and Cr3+ on natural clinoptilolite: Selectivity determination and influence of acidity on metal uptake

Inglezakis, VJ; Loizidou, MD; Grigoropoulou, HP

dc.contributor.author	Inglezakis, VJ	en
dc.contributor.author	Loizidou, MD	en
dc.contributor.author	Grigoropoulou, HP	en
dc.date.accessioned	2014-03-01T01:19:04Z
dc.date.available	2014-03-01T01:19:04Z
dc.date.issued	2003	en
dc.identifier.issn	0021-9797	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15366
dc.subject	Acidity	en
dc.subject	Clinoptilolite	en
dc.subject	Heavy metals	en
dc.subject	Ion exchange	en
dc.subject	Selectivity	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.other	Acidity	en
dc.subject.other	Copper	en
dc.subject.other	Iron	en
dc.subject.other	Lead	en
dc.subject.other	Positive ions	en
dc.subject.other	Solutions	en
dc.subject.other	Clinoptilolite	en
dc.subject.other	Ion exchange	en
dc.subject.other	chemical compound	en
dc.subject.other	chromium	en
dc.subject.other	clinoptilolite	en
dc.subject.other	copper	en
dc.subject.other	heavy metal	en
dc.subject.other	iron	en
dc.subject.other	lead	en
dc.subject.other	unclassified drug	en
dc.subject.other	acidity	en
dc.subject.other	article	en
dc.subject.other	cation exchange	en
dc.subject.other	competitive behavior	en
dc.subject.other	concentration (parameters)	en
dc.subject.other	priority journal	en
dc.subject.other	transport kinetics	en
dc.subject.other	Acids	en
dc.subject.other	Chromatography, Ion Exchange	en
dc.subject.other	Chromium	en
dc.subject.other	Copper	en
dc.subject.other	Hydrogen-Ion Concentration	en
dc.subject.other	Iron	en
dc.subject.other	Lead	en
dc.subject.other	Water Pollutants, Chemical	en
dc.subject.other	Water Purification	en
dc.subject.other	Zeolites	en
dc.title	Ion exchange of Pb2+, Cu2+, Fe3+, and Cr3+ on natural clinoptilolite: Selectivity determination and influence of acidity on metal uptake	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0021-9797(02)00244-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0021-9797(02)00244-8	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	In the present study ion exchange of Pb2+, Cu2+, Fe3+, and Cr3+ on natural Greek clinoptilolite was examined in terms of selectivity toward the above heavy metals in single- and multicomponent solutions in batch systems. Also examined. are the influence of clinoptilolite on solution acidity and the effect of acidity on the ion exchange process. Clinoptilolite increases solution acidity due to the exchange of H+ cations with the cations initially present in its structure. H+ cations should be considered as competitive ones in ion exchange processes, and consequently ion exchange of metals is favored at high acidity values. Cu2+ and Cr3+ are the most sensitive cations with respect to acidity. Selectivity determination demonstrates that the selectivity at total concentration 0.01 N and acidity 2 in both single- and multicomponent solutions is following the order Pb2+ > Fe3+ > Cr3+ greater than or equal to Cu2+. This order is set since the first days of equilibration. However, Cu2+ shows remarkable changes in selectivity and generally its uptake and selectivity are increasing with time. On the other hand selectivity in single metal solutions where acidity is not adjusted is following the order Pb2+ > Cr3+ > Fe3+ congruent to Cu2+. (C) 2003 Elsevier Science (USA). All rights reserved.	en
heal.publisher	ACADEMIC PRESS INC ELSEVIER SCIENCE	en
heal.journalName	Journal of Colloid and Interface Science	en
dc.identifier.doi	10.1016/S0021-9797(02)00244-8	en
dc.identifier.isi	ISI:000182803300006	en
dc.identifier.volume	261	en
dc.identifier.issue	1	en
dc.identifier.spage	49	en
dc.identifier.epage	54	en