Abstract
The dissolution of calcite under conditions of high pH (8.0--9.0) is shown to be strongly inhibited by the presence of magnesium (Mg[sup 2+]) cations. Channel flow cell measurements are used to deduce the appropriate rate law for dissolution and it is demonstrated that the inhibition arises from competitive Langmuirian adsorption of Mg[sup 2+] and Ca[sup 2+] ions on the calcite surface.
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