Figure 5

The effect of PCA4 on wollastonite dissolution and CaCO3 formation using different CO2 concentrations.
(a) Ca2+ concentration at different sampling times with PCA4 added to the reaction system at atmospheric and 3.9% CO2 concentration levels. (b) mineralization in the reaction system without PCA4 (gray bar) or with (black bar) using different CO2 concentrations.