Total dynamics of quartz-water system at ambient conditions
| Název česky | Celková dynamika systému křemen-voda za normálních podmínek |
|---|---|
| Autoři | |
| Rok publikování | 2005 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Aquatic Geochemistry |
| Fakulta / Pracoviště MU | |
| Citace | |
| Obor | Geochemie |
| Klíčová slova | complex; dissolution; dynamics; flux; growth; modeling; PHREEQC; quartz; surface |
| Popis | New data on the dissolution and growth of quartz in acid, nearly neutral and slightly alkaline solutions at ambient conditions are presented. During batch dissolutions, aqueous Si-concentrations increased nonlinearly towards limit values. During parallel growth experiments, however, the high Si-concentrations corresponding to 13-fold supersaturation with respect to quartz did not decreased. To interpret these results, two dynamic models (1) a reaction model and (2) a surface-complexation model, were derived. Both models were focused on (a) reversible dissolution/growth of bulk quartz and b) irreversible dissolution of disturbed quartz (weakly bounded Si-atoms) on new surface. |
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