Mechanism of aqueous uranium (VI) uptake by natural zeolitic tuff

Krestou, A; Xenidis, A; Panias, D

dc.contributor.author	Krestou, A	en
dc.contributor.author	Xenidis, A	en
dc.contributor.author	Panias, D	en
dc.date.accessioned	2014-03-01T01:19:17Z
dc.date.available	2014-03-01T01:19:17Z
dc.date.issued	2003	en
dc.identifier.issn	08926875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/15397
dc.subject	Environmental	en
dc.subject	Industrial minerals	en
dc.subject	Ion exchange	en
dc.subject	Pollution	en
dc.subject.other	Adsorption	en
dc.subject.other	Carbon dioxide	en
dc.subject.other	Carbonates	en
dc.subject.other	Dissolution	en
dc.subject.other	Ion exchange	en
dc.subject.other	pH	en
dc.subject.other	Removal	en
dc.subject.other	Solutions	en
dc.subject.other	Sulfur compounds	en
dc.subject.other	Uranium	en
dc.subject.other	Physicochemical properties	en
dc.subject.other	Retention time	en
dc.subject.other	Solid-liquid ratio	en
dc.subject.other	Zeolites	en
dc.title	Mechanism of aqueous uranium (VI) uptake by natural zeolitic tuff	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2003.08.012	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2003.08.012	en
heal.publicationDate	2003	en
heal.abstract	The objective of this study was the examination of the ability of a natural zeolitic tuff to remove hexavalent uranium from aqueous solutions under various conditions. In order to achieve this goal, batch experiments were conducted to investigate the effect of pH, retention time, solid/liquid ratio and the presence of CO32- and SO42- ions in the solution. The results indicated that the natural zeolitic tuff is an effective material in the pH region 5-9 when the content of carbonates in the solution is controlled by the dissolution of the atmospheric carbon dioxide. In the case that the content of carbonates in the solution is controlled by geochemical processes and thus is enough high, the natural zeolitic tuff was proven an ineffective material. The interpretation of the results based on the aqueous chemistry of U(VI) containing aqueous solutions as well as on the physicochemical properties of the natural zeolite/solution interface indicates that the U(VI) uptake by the zeolitic tuff is attributed to an adsorption mechanism.	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2003.08.012	en
dc.identifier.volume	16	en
dc.identifier.issue	12	en
dc.identifier.spage	1363	en
dc.identifier.epage	1370	en