Total dynamics of quartz-water system at ambient conditions

Warning

This publication doesn't include Institute of Computer Science. It includes Faculty of Science. Official publication website can be found on muni.cz.

Authors	FAIMON Jiří
Year of publication	2005
Type	Article in Periodical
Magazine / Source	Aquatic Geochemistry
MU Faculty or unit	Faculty of Science
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.
Related projects:	Interactions among the chemicals, environment and biological systems and their consequences on the global, regional and local scales (INCHEMBIOL)