Recovery of uranium from the filtrate of 'ammonium diuranate' prepared from uranium hexafluoride

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dc.contributor.authorSENEDA, J.A.pt_BR
dc.contributor.authorFIGUEIREDO, F.F.pt_BR
dc.contributor.authorABRAO, A.pt_BR
dc.contributor.authorCARVALHO, F.M.S.pt_BR
dc.contributor.authorFRAJNDLICH, E.U.C.pt_BR
dc.coverageInternacionalpt_BR
dc.date.accessioned2014-07-30T17:22:15Zpt_BR
dc.date.accessioned2014-07-30T19:00:20Z
dc.date.available2014-07-30T17:22:15Zpt_BR
dc.date.available2014-07-30T19:00:20Z
dc.date.issued2001pt_BR
dc.description.abstractThe hydrolysis of uranium hexafluoride and its conversion to 'ammonium diuranate' yields an alkaline solution containing ammonium fluoride and low concentrations of uranium. The recovery of the uranium has the advantage of saving this valuable metal and the avoidance of unacceptable discarding the above mentioned solution to the environment. The recovery of uranium(VI) is based on its complex with the excess of fluoride in the solution and its adsorption on to an anionic ion-exchange resin. The 'ammonium diuranate' filtrate has an approximate concentration of 130 mg l-1 of uranium and 20 g l-1 of ammonium fluoride. An effective separation and recovery of the uranyl fluoride was achieved by choosing a suitable pH and flow rate of the uranium-bearing solution on to the resin column. The effluent ammonium fluoride will be recovered as well. Uranium fluoride adsorbed by the ion-exchanger is then transformed into the corresponding uranyl tricarbonate complex by percolation of a dilute ammonium carbonate solution. Finally, the free fluoride uranium carbonate is eluted from the resin with a more concentrate ammonium carbonate solution. The eluate now can be storage to be precipitated as ammonium uranyl carbonate (AUC). The loading and elution of uranium(VI) on to the ion-exchange column was followed up by a fluorescence test. A flux prepared using a mixture of sodium and potassium carbonate and ammonium fluoride was used for the uranium fluorescence test (ultraviolet lamp). Based on the successful recovery of the uranium on a laboratory scale this process is being considered for use with enriched uranium.
dc.format.extent838-841pt_BR
dc.identifier.citationSENEDA, J.A.; FIGUEIREDO, F.F.; ABRAO, A.; CARVALHO, F.M.S.; FRAJNDLICH, E.U.C. Recovery of uranium from the filtrate of 'ammonium diuranate' prepared from uranium hexafluoride. <b>Journal of Alloys and Compounds</b>, v. 323/324, p. 838-841, 2001. DOI: <a href="https://dx.doi.org/10.1016/S0925-8388(01)01156-2">10.1016/S0925-8388(01)01156-2</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/6141.
dc.identifier.doi10.1016/S0925-8388(01)01156-2
dc.identifier.issn0925-8388pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0001-8542-3827
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/6141pt_BR
dc.identifier.vol323/324pt_BR
dc.relation.ispartofJournal of Alloys and Compoundspt_BR
dc.rightsopenAccessen
dc.sourceApresentado em: INTERNATIONAL CONFERENCE ON F-ELEMENTS, 4th, Sept. 17-21, 2000, Madrid, Spainpt_BR
dc.subjecturaniumpt_BR
dc.subjectadupt_BR
dc.subjection exchangept_BR
dc.subjectammonium fluoridespt_BR
dc.subjecturanyl fluoridespt_BR
dc.subjecturanium hexafluoridept_BR
dc.titleRecovery of uranium from the filtrate of 'ammonium diuranate' prepared from uranium hexafluoridept_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorELITA FONTENELE URANO DE CARVALHO
ipen.autorALCIDIO ABRAO
ipen.autorFRANCISCO FELIX DE FIGUEIREDO
ipen.autorJOSE ANTONIO SENEDA
ipen.autorFATIMA MARIA SEQUEIRA DE CARVALHO
ipen.codigoautor895
ipen.codigoautor596
ipen.codigoautor1090
ipen.codigoautor64
ipen.codigoautor1193
ipen.contributor.ipenauthorELITA FONTENELE URANO DE CARVALHO
ipen.contributor.ipenauthorALCIDIO ABRAO
ipen.contributor.ipenauthorFRANCISCO FELIX DE FIGUEIREDO
ipen.contributor.ipenauthorJOSE ANTONIO SENEDA
ipen.contributor.ipenauthorFATIMA MARIA SEQUEIRA DE CARVALHO
ipen.date.recebimento02-08pt_BR
ipen.identifier.fi0.953pt_BR
ipen.identifier.ipendoc08263pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi0.001 - 1.499
ipen.type.genreArtigo
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relation.isAuthorOfPublication.latestForDiscovery57b3c8a0-54fe-463f-b6d6-13eed673310d
sigepi.autor.atividadeSENEDA, J.A.:64:39:Spt_BR
sigepi.autor.atividadeFIGUEIREDO, F.F.:1090:42:Npt_BR
sigepi.autor.atividadeABRAO, A.:596:-1:Npt_BR
sigepi.autor.atividadeCARVALHO, F.M.S.:1193:-1:Npt_BR
sigepi.autor.atividadeFRAJNDLICH, E.U.C.:895:42:Npt_BR
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