Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6438266 | Geochimica et Cosmochimica Acta | 2014 | 12 Pages |
Abstract
Thermodynamic modeling was used to test various concepts accounting for these results. The model made use of a novel framework capable of isolating electrostatic contributions from different faces, and of accounting for ion-specific double-layer properties within a single crystallographic face. These efforts made use of capacitance values for each electrolyte ions within the framework of a recently developed Variable Capacitance Model. Attempts at modeling all three particle types were used to suggest that the (0 1 0) face contains â¼0.9 site nmâ2 of proton active sites, a value notably constrained by recently published Na+, Clâ, and ClO4â loadings derived by cryogenic X-ray photoelectron spectroscopy. The model presented in this work thus provides a means to predict p.d.i. loadings on multifaceted mineral particle surfaces, and can therefore be used to constrain further our understanding of mineral/water interface reactivity.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
Jean-François Boily, Philipp A. Kozin,