Publication details
Total dynamics of quartz-water system at ambient conditions
| Authors | |
|---|---|
| Year of publication | 2005 |
| Type | Article in Periodical |
| Magazine / Source | Aquatic Geochemistry |
| MU Faculty or unit | |
| Citation | |
| Field | Geochemistry |
| Keywords | complex; dissolution; dynamics; flux; growth; modeling; PHREEQC; quartz; surface |
| Description | 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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