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Título : Cadmium adsorption onto gamma-alumina nanoparticles: experimental and modelling study
Autor : Alonso, Ursula
Mayordomo, Natalia
Missana, Tiziana
Palabras clave : Cadmio
Alumina
Nanoparticulas
Adsorción
Fecha de publicación : dic-2019
Editorial : Editorial CIEMAT
Citación : Alonso U., Mayordomo N., Missana T., Cadmium adsorption onto gamma-alumina nanoparticles: experimental and modelling study, Informe Técnico CIEMAT 1465 (2019)
Resumen : Cadmium is one of the heavy metals of concern, both from the point of view of public health and environmental safety, because it is a toxic element, bio-accumulative and persistent. Therefore, it is considered of vital importance to develop materials and methodologies that favour its retention and removal. In this study, the retention of cadmium in a nanoparticulate oxide, -Al2O3 was analyzed. A complete experimental sorption study in a wide range of chemical was carried out, to elucidate the main retention mechanisms. This study is part of a broader work, in which the sorption behaviour of mixed systems, including clay materials that would form a geochemical barrier, was analysed. For analogy with previous studies of retention of contaminants in clays, a non-electrostatic surface complexation model, mechanistic and thermodynamic-based, was selected to describe Cd retention on -Al2O3. The developed model was tested on experimental data and allows the prediction of cadmium retention in different environmental scenarios.
URI : http://documenta.ciemat.es/handle/123456789/3300
ISSN : 1135-9420
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