『Abstract
　Experiments on dissolution kinetics of galena were performed in 1 mol l^-1 NaCl solutions at pH 0.43-2.45 and 25-75℃. When the dissolution reaction is far from equilibrium, a linear relation exits between the dissolution rate, r, and the H⁺ ion activity, [H⁺]. The rate law for galena dissolution is given by the following equation: r = k [H⁺]. With respect to H⁺, the dissolution reaction is in the first order. The apparent rate constant, k, has values of 2.34×10^-7 mol m^-2 s^-1 at 25℃, 1.38×10^-6 mol m^-2 s^-1 at 50℃, and 7.08×10^-6 mol m^-2 s^-1 at 75℃. The activation energy of dissolution reaction is 43.54 kJ mol^-1. The mechanism of dissolution is suggested to be surface chemical reaction, and the rate determining step is the dissociation of the Pb-S bond of the surface complex, which releases Pb²⁺ into the solution.』

1. Introduction
2. Experimental methods
3. Experimental results
4. Discussion
　4.1. Rate law
　4.2. Reaction mechanism
5. Conclusion
Acknowledgements
References