2008 Volume 37 Issue 5 Pages 508-509
The dissolution rate and solubility of calcite, a polymorph of CaCO3, were determined in aspartic acid (Asp) solutions: Asp inhibited the surface reaction of calcite dissolution but accelerated the transport process. The crossover of these contrastive effects caused a local maximum of the dissolution rate constant and the transition of rate-determining processes. The calcite solubility increased with increasing Asp concentration, which may reflect its association with the change of the calcite surface structure derived from the addition of Asp.
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