『Abstract
　Steady-state dissolution rates of Haute Vallee（最初のeの頭に´） de l'Aude dolomite were measured as a function of chemical affinity and aqueous solution composition in mixed-flow reactors at 80℃. Experiments were performed in HCl-NaHCO3 bearing aqueous solutions with in-situ pH ranging from 6.36 to 7.17. Rates are found to be a strong function of aqueous carbonate concentrations at far-from-equilibrium conditions. Measured rates can be described using the dissolution mechanism of Pokrovsky and Schott [Pokrovsky, O.S., Schott, J., 2001. Kinetics and mechanism of dolomite dissolution in neutral to alkaline solutions revisited. Am.J.Sci., 301, 597-626] where rates are controlled by the detachment of the ＞MgOH2⁺ species at the dolomite surface. Within this mechanism, dolomite dissolution rates can be described using
r = kMg⁺ { KCO3^*KCa^*/(KCO3^*KCa^* +KCa^*aCO3^2- + aCO3^2-aCa²⁺) }ⁿ(1 - exp(-nA/RT))
where r refers to the overall BET surface area normalized dolomite dissolution rate at both near and far-from-equilibrium conditions, kMg⁺ designates a rate constant equal to 4.0 ×10^-12 mol cm^-2 s^-1, KCa^* and KCO3^* denote equilibrium constants equal to 3.5 ×10^-5 and 4.5 ×10^-5, respectively, ai refers to the activity of the subscripted aqueous species, A corresponds to the chemical affinity of the dissolving dolomite, R represents the gas constant, T symbolizes absolute temperature and n designates a stoichiometric coefficient equal to 1.9.

Keywords: Dolomite dissolution rates; CO2 sequestration; Kinetics; Weathering』

1. Introduction
2. Theoretical background
3. Materials and methods
4. Results and discussion
5. Conclusions
acknowledgments
References