Kinetics of talc dissolution in the presence of organic complexing agents

Natural silicates are potential sources of divalent cations, which are necessary for the mineralization of CO2 in the form of carbonates. The kinetics study of the natural talc dissolution was carried out in flow-through reactors at 25 °C in the presence and absence of organic ligands — oxalate and citrate, at pH 3. Increasing of the rate of talc dissolution in the presence of citrate and oxalate, approximately 3–4 times, is typical only for the initial stage of mineral dissolution. The steady-state dissolution rates of talc were established approximately 30–40 hours after the beginning of the experiment and were equal to 3E–10–16 mol/cm2s.