The Kinetics of Gypso Anhydrites Dissolution in Water: Experimental Studies

Abstract

Experiments on the kinetics of gypso anhydrites dissolution in water (25°С, 0.1 MPa) resulted in the development of a model of the process in the form of balance equations of dissolution kinetics for gypsum and anhydrite (first and second order, respectively), as well as of the kinetics of gypsum precipitation (the second order). The data from the experiments were processed based on the Riccati equation. The calculated values were closer to the experimental data when the common-ion effect on the solubility of gypsum and anhydrite was included.