IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Experimental and theoretical study of Co sorption in clay montmorillonites.
Autor/es:
TAYLOR, MARCELA ANDREA; GIL REBAZA, ARLES; ERRICO, L A; GIL REBAZA, ARLES; ERRICO, L A; MONTES, MARIA LUCIANA; ALONSO, ROBERTO E; MONTES, MARIA LUCIANA; ALONSO, ROBERTO E; TAYLOR, MARCELA ANDREA
Revista:
Materials Research Express
Editorial:
IOP Publishing
Referencias:
Año: 2018 p. 35519 - 35519
ISSN:
2053-1591
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 clay. For the case of the Co-MMT, the hyperfine parameters are presented for the first time. 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 by the ab initio calculation."