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dc.creatorChain Villar, Pabloes
dc.creatorCota Reguero, Agustínes
dc.creatorPavón González, Esperanzaes
dc.creatorPazos Zarama, Mery Carolinaes
dc.creatorAlba Carranza, María Doloreses
dc.date.accessioned2018-02-21T15:12:38Z
dc.date.available2018-02-21T15:12:38Z
dc.date.issued2013
dc.identifier.citationChain Villar, P., Cota Reguero, A., Pavón González, E., Pazos Zarama, M.C. y Alba Carranza, M.D. (2013). Evaluation of rare earth on layered silicates under subcritical conditions: Effect of the framework and interlayer space composition. Chemical Geology, 347, 208-216.
dc.identifier.issn0009-2541es
dc.identifier.urihttps://hdl.handle.net/11441/70496
dc.description.abstractClay-based minerals are considered to be an important component in backfill barriers due to both their ability to seal and adsorb radioactive waste and to interact chemically with it under subcritical conditions. Herein, we describe a systematic study of the properties of layered silicates that could affect their hydrothermal reactivity, namely type of layers, octahedral occupancy, origin and total amount of the layer charge, and nature of the interlayer cation. The silicates studied were selected on the basis of their different characteristics associated with these properties and were treated hydrothermally at 300 °C for 48 h in a 7.3 · 10− 2 M Lu(NO3)3 · 3.6H2O solution. The final products were analyzed by X-ray diffraction and solid-state NMR spectroscopy. All the layered silicates studied were found to be able to generate a Lu2Si2O7 phase after hydrothermal treatment under subcritical conditions, thereby confirming the participation of a chemical mechanism of the clay barrier generating phases being stables with temperature and pH conditions. However, the extent of this reaction depends to a large extent on the physicochemical properties of the framework and the interlayer space composition, such as the presence or absence of an octahedral sheet, the degree of occupancy of this sheet, and the origin and total layer charge. Therefore, this study allows tuning the clay mineral framework characteristic that favors the rare earth cations (as trivalent actinide simulator) immobilization.es
dc.description.sponsorshipDirección General de Investigaciones Científicas y Técnicas CTQ2010-14874es
dc.formatapplication/pdfes
dc.language.isoenges
dc.publisherElsevieres
dc.relation.ispartofChemical Geology, 347, 208-216.
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internacional*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectSubcritical conditionses
dc.subjectHydrothermal 35 treatmentes
dc.subjectRare-earthes
dc.subjectRadioactive wastees
dc.subjectEngineered barrieres
dc.subjectX-ray diffractiones
dc.subjectMAS-NMRes
dc.subjectDisilicateses
dc.subjectBentonitees
dc.subjectSmectitees
dc.titleEvaluation of rare earth on layered silicates under subcritical conditions: Effect of the framework and interlayer space compositiones
dc.typeinfo:eu-repo/semantics/articlees
dc.type.versioninfo:eu-repo/semantics/submittedVersiones
dc.rights.accessrightsinfo:eu-repo/semantics/openAccesses
dc.relation.projectIDCTQ2010-14874es
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.chemgeo.2013.03.006es
dc.identifier.doi10.1016/j.chemgeo.2013.03.006es
idus.format.extent33 p.es
dc.journaltitleChemical Geologyes
dc.publication.volumen347es
dc.publication.initialPage208es
dc.publication.endPage216es
dc.contributor.funderMinisterio de Ciencia e Innovación (MICIN). España

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