wAbstract
@Steady-state dissolution rates of basaltic glass were measured
in mixed-flow reactors at 50 at pH 3 and 4 as a function of aqueous
sulphate concentration. Dissolution rates in the presence of 0.1
moles/kg SO42- were found to be
`3 times greater than those in corresponding SO42-
free solutions. This rate increase is found to be approximately
consistent with that calculated using a rate equation previously
proposed by Gislason and Oelkers (2003). These results suggest
that the addition of sulphate to injected CO2
may facilitate CO2 sequestration in basalts
by accelerating basaltic glass dissolution rates thus more rapidly
releasing aqueous Ca and Mg to solution.
Keywords: basaltic glass; dissolution rates, CO2
sequestration; kinetics; aqueous sulphatex
Introduction
Materials and methods
Results
Discussion and conclusions
Acknowledgements
References