on exchange reactions of major inorganic cations (H+, Na+, Ca2+, Mg2+ and K+) on beidellite: Experimental results and new thermodynamic database. Toward a better prediction of contaminant mobility in natural environments

To our knowledge, no thermodynamic database is available in the literature concerning ion-exchange reactions occurring in low-charge smectite with tetrahedral charge (beidellite). The lack of this information makes it difficult to predict the mobility of contaminants in environments where beidellite...

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Bibliographic Details
Published in:Applied geochemistry 2015-08, Vol.59, p.74-84
Main Authors: Robin, Valentin, Tertre, Emmanuel, Beaufort, Daniel, Regnault, Olivier, Sardini, Paul, Descostes, Michael
Format: Article
Language:English
Subjects:
Earth Sciences
Sciences of the Universe
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Summary:To our knowledge, no thermodynamic database is available in the literature concerning ion-exchange reactions occurring in low-charge smectite with tetrahedral charge (beidellite). The lack of this information makes it difficult to predict the mobility of contaminants in environments where beidellite and major cations, which act as competitors with contaminants for sorption on the clay phase, are present. The present study proposes a multi-site ion exchange model able to describe experimental data obtained for H+ and the four major cations (Na+, Ca2+, Mg2+ and K+) found in natural waters interacting with a
ISSN:0883-2927
DOI:10.1016/j.apgeochem.2015.03.016