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Effect of the presence of Fe (0) on the sorption of lanthanum and lutetium mixtures in smectites

Opened Access Effect of the presence of Fe (0) on the sorption of lanthanum and lutetium mixtures in smectites

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Autor: Galunin, Evgeny
Alba Carranza, María Dolores
Santos, María J.
Vidal, Miquel
Fecha: 2012
Publicado en: Applied Clay Science, 65-66, 162-172.
Tipo de documento: Artículo
Resumen: The sorption of La and Lu mixtures was examined in two bentonites after incubation for three months at 20 and 80 °C with Fe(0), as a laboratory approach to evaluate the effects of waste canister corrosion in a deep repository on the performance of clay engineered barriers. The sorption/desorption parameters were determined from batch tests in two ionic media: deionized water and, to consider the additional effect of cement leachates, 0.02 mol L− 1 Ca. Results from XRD analyses showed the formation of crystalline FeO(OH), goethite, in a few samples and the degradation of the bentonites due to Fe(0) oxidation during incubation. Moreover, the EDX spectra showed that the lanthanides were sorbed primarily at smectite sites, although sorption onto goethite was also observed, whereas Fe(0) particles did not contribute to lanthanide sorption. The formation of goethite could explain the high Kd values measured in a few scenarios (e.g., those with single solutions or mixtures with the lowest in...
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Cita: Galunin, E., Alba Carranza, M.D., Santos, M.J. y Vidal, M. (2012). Effect of the presence of Fe (0) on the sorption of lanthanum and lutetium mixtures in smectites. Applied Clay Science, 65-66, 162-172.
Tamaño: 124.1Kb
Formato: PDF

URI: https://hdl.handle.net/11441/71036

DOI: 10.1016/j.clay.2012.06.011

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