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Thermal characterization of Montmorillonite clays saturated with various cations

Opened Access Thermal characterization of Montmorillonite clays saturated with various cations

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Autor: Balek, V.
Benes, M.
Subrt, Jan
Pérez Rodríguez, José Luis
Sánchez Jiménez, Pedro Enrique
Pérez Maqueda, Luis Allan
Pascual Cosp, José
Departamento: Universidad de Sevilla. Departamento de Química Inorgánica
Fecha: 2008
Publicado en: Journal of thermal Analysis and Calorimetry, 92, 191-197.
Tipo de documento: Artículo
Resumen: Emanation thermal analysis (ETA), thermogravimetry and high temperature XRD were used to characterize the thermal behavior during dehydration of natural Na montmorillonite (Upton Wyoming, USA) and homoionic montmorillonite (MMT) samples saturated with different cations, i.e. Li+, Cs+, NH 4 +, Mg2+ and Al3+. ETA results characterized radon mobility and microstructure changes that accompanied the mass loss of the samples due to dehydration on heating in air. A collapse of interlayer space between the silicate sheets after water release from the MMT samples was characterized by a decrease of the radon release rate, ΔE. Decreases in c-axis basal spacing (d 001) values determined from XRD patterns for the different montmorillonite samples follow the sequence: Mg−MMT>Al−MMT>Li−MMT>Na−MMT>NH4−MMT>Cs−MMT The decrease of the radon release rate (ΔE) determined by ETA that characterized microstructure changes due to collapse of interlayer space corresponded well to differences in the c-axis basa...
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Cita: Balek, V., Benes, M., Subrt, J., Pérez Rodríguez, J.L., Sánchez Jiménez, P.E., Pérez Maqueda, L.A. y Pascual Cosp, J. (2008). Thermal characterization of Montmorillonite clays saturated with various cations. Journal of thermal Analysis and Calorimetry, 92, 191-197.
Tamaño: 277.6Kb
Formato: PDF

URI: https://hdl.handle.net/11441/74143

DOI: 10.1007/s10973-007-8761-9

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