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dc.contributor.author
Lago, Diana Carolina
dc.contributor.author
Nuñez, Matias
dc.contributor.author
Prado, Miguel Oscar
dc.date.available
2018-03-22T16:42:24Z
dc.date.issued
2016-05
dc.identifier.citation
Lago, Diana Carolina; Nuñez, Matias; Prado, Miguel Oscar; Adsorption of CsCl on porous SiO2 glass surface: Experimental results and ab-initio calculations; Elsevier Science; Journal of Non-crystalline Solids; 440; 5-2016; 70-75
dc.identifier.issn
0022-3093
dc.identifier.uri
http://hdl.handle.net/11336/39676
dc.description.abstract
The disposal of nuclear wastes is an issue of global concern due to the physicochemical and radiologic properties of some isotopes. Cesium radionuclides exhibit high solubility and some of them pose a long half-life. This work focuses on the study of Cs+ adsorption on the surface of a porous silica glass. Adsorption experiments were done at room temperature using aqueous solutions with concentrations of 0.1 and 0.5 M of CsCl at pH = 5 and surface area to volume of 0.1 cm- 1. In these conditions, 14 and 18 mgCs/gSiO2 were adsorbed, respectively. The adsorbed quantity of Cs+ was determined by atomic absorption spectroscopy (AAS) analyzing the quantity of Cs+ contained in the solution before and after adsorption experiments. The Cs+/Cl- ratio at a glass cross section surface, determined by energy dispersive spectroscopy analysis, is near 6. In addition, first principle calculations were performed, in order to determine charge transfer and location of the active sites for Cs+ and Cl-. Adhesion energy values are presented, which explain the experimental values found for the Cs+/Cl- concentration ratio at the silica glass surface. The parameters calculated from experimental and ab-initio calculations results were used to explain the adsorption mechanism.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Elsevier Science
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.subject
Adsorption
dc.subject
Density Functional
dc.subject
Glass
dc.subject
Porous Silica
dc.subject.classification
Nano-materiales
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Nanotecnología
dc.subject.classification
INGENIERÍAS Y TECNOLOGÍAS
dc.title
Adsorption of CsCl on porous SiO2 glass surface: Experimental results and ab-initio calculations
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-03-22T13:04:51Z
dc.journal.volume
440
dc.journal.pagination
70-75
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Lago, Diana Carolina. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Nuñez, Matias. Universidad Nacional de Cuyo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Prado, Miguel Oscar. Comisión Nacional de Energía Atómica. Centro Atómico Bariloche; Argentina. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.journal.title
Journal of Non-crystalline Solids
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jnoncrysol.2016.02.020
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0022309316300400
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