Coupled carbonate mineral dissolution and growth: calcite and strontianite

摘要

As part of a larger project aimed at reconciling results from microscopic and macroscopic reactive transport experiments and modeling, we studied the coupled dissolution of calcite and growth of strontianite. Although our analyses are ongoing, preliminary results suggest that the experiments designed to examine the two scales yielded similar results in terms of processes. Quantification of rates extracted from experimental results at each scale continues. The comparison of macroscopic experimental results to a priori reactive transport simulation presented here shows that, in general, the model over-predicts both dissolution and growth rates to some extent. The model does represent processes well and captures solution concentrations in time and mineral distribution in space for the macroscopic experiment reasonably well.