Separation of uranium from uraniferous coaly clays using a selective ion-exchange two-step elution system

Ochsenkuhn-Petropulu, M; Parissakis, G

dc.contributor.author	Ochsenkuhn-Petropulu, M	en
dc.contributor.author	Parissakis, G	en
dc.date.accessioned	2014-03-01T01:09:32Z
dc.date.available	2014-03-01T01:09:32Z
dc.date.issued	1993	en
dc.identifier.issn	0937-0633	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/11063
dc.subject.classification	Chemistry, Analytical	en
dc.title	Separation of uranium from uraniferous coaly clays using a selective ion-exchange two-step elution system	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/BF00323324	en
heal.identifier.secondary	http://dx.doi.org/10.1007/BF00323324	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	An ion-exchange process for the selective separation and enrichment of uranium from the main elements Si, Al, Fe, Ca, Mg, Na, K as well as from Mo and V, which are present in uraniferous coaly clays, has been developed. After a selective carbonate leaching of the roasted ore, a 0.5 mol/l Na2CO3/0.5 mol/l NaHCO3 solution was passed through the macroporous ion-exchanger AG MP-1, which at pH10 absorbed uranium quantitatively in form of a carbonato complex. Remaining absorbed amounts of Mo and V were eluted with 0.1 mol/l EDTA in 0.5 mol/l Na2CO3/0.5 mol/l NaHCO3, while U was quantitatively separated by a second elution step with 0.5 mol/l HNO3 and was afterwards precipitated with NH4OH as a high-grade yellow cake. Differential pulse polarography (DPP), atomic absorption spectroscopy (AAS), X-ray fluorescence (XRF), instrumental neutron activation analysis (INAA) and inductively coupled plasma mass spectrometry (ICP-MS) had been used to determine the uranium content in the raw materials and to investigate the effectivity of the different steps of the developed process. © 1993 Springer-Verlag.	en
heal.publisher	Springer-Verlag	en
heal.journalName	Fresenius' Journal of Analytical Chemistry	en
dc.identifier.doi	10.1007/BF00323324	en
dc.identifier.isi	ISI:A1993KH69600009	en
dc.identifier.volume	345	en
dc.identifier.issue	1	en
dc.identifier.spage	43	en
dc.identifier.epage	47	en