Artículo
Experimental and theoretical study of Co sorption in clay montmorillonites
Gil Rebaza, Arles Víctor
; Montes, María Luciana
; Taylor, Marcela Andrea
; Errico, Leonardo Antonio
; Alonso, Roberto Emilio
Fecha de publicación:
03/2018
Editorial:
IOP Publishing
Revista:
Materials Research Express
ISSN:
2053-1591
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Montmorillonite (MMT) clays are 2:1 layered structures which in natural state may allocate different hydrated cations such as M-nH2O (M =Na, Ca, Fe, etc) in its interlayer space. Depending on the capability for ion sorption, these materials are interesting for environmental remediation. In this work we experimentally study the Co sorption in a natural Na-MMT using UV-visible spectrometry and XRD on semi-oriented samples, and then analyze the sorption ability of this clay by means of ab initio calculation performed on pristine MMT. The structural properties of Na-MMT and Co-adsorbed MMT, and the hyperfine parameters at different atomic sites were analyzed and compared with the experimental ones for the first, and for the case of the hyperfine parameters, presented for the first time for the last. The theoretical predictions based on total energy considerations confirm that Co incorporation replacing Na is energetically favorable. Also, the basal spacing d001 experimentally obtained is well reproduced.
Palabras clave:
AB INITIO
,
CLAY
,
HYPERFINE PARAMETERS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Gil Rebaza, Arles Víctor; Montes, María Luciana; Taylor, Marcela Andrea; Errico, Leonardo Antonio; Alonso, Roberto Emilio; Experimental and theoretical study of Co sorption in clay montmorillonites; IOP Publishing; Materials Research Express; 5; 3; 3-2018; 1-21
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