Mechanism of aqueous uranium(VI) uptake by hydroxyapatite

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	2014-03-01T01:21:01Z
dc.date.available	2014-03-01T01:21:01Z
dc.date.issued	2004	en
dc.identifier.issn	0892-6875	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16043
dc.subject	Environmental	en
dc.subject	Industrial Minerals	en
dc.subject	Pollution	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Mineralogy	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Adsorption	en
dc.subject.other	Chemical analysis	en
dc.subject.other	Groundwater	en
dc.subject.other	Hydroxyapatite	en
dc.subject.other	Mineralogy	en
dc.subject.other	pH effects	en
dc.subject.other	Precipitation (chemical)	en
dc.subject.other	Remediation	en
dc.subject.other	Solutions	en
dc.subject.other	Ultraviolet spectrophotometers	en
dc.subject.other	Water pollution	en
dc.subject.other	X ray diffraction analysis	en
dc.subject.other	Atmosphere systems	en
dc.subject.other	Industrial minerals	en
dc.subject.other	Uranium	en
dc.title	Mechanism of aqueous uranium(VI) uptake by hydroxyapatite	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.mineng.2003.11.019	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.mineng.2003.11.019	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	The objective of this work was the study of the mechanism employed by hydroxyapatite (HAP), Ca5OH(PO4)(3), for the removal of hexavalent uranium from water in open to the atmosphere systems. The work showed that the attenuation mechanism employed by HAP can be attributed to bulk precipitation with almost 95% removal of U(VI) in a very short time, regardless of the applied conditions. A theoretical study of the HAP-U(VI) system showed that, depending on the pH, uranium (VI) can be precipitated either in the form of Ca(UO2)(PO4)(2) or as CaUO2(CO3)(2). The precipitates formed are extremely stable in acid and neutral solutions, but not in alkaline solutions where an amount of approximate to 32% of the precipitated uranium(VI) is dissolved. (C) 2004 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	Minerals Engineering	en
dc.identifier.doi	10.1016/j.mineng.2003.11.019	en
dc.identifier.isi	ISI:000220051500001	en
dc.identifier.volume	17	en
dc.identifier.issue	3	en
dc.identifier.spage	373	en
dc.identifier.epage	381	en