The mechanism of dissolution of minerals in acidic and alkaline solutions: Part V surface charge and zeta potential

• We show how dissolution affects the surface charge and zeta potential.
• We develop the models for the zeta potential based on partial equilibrium.
• We show that the zeta potential of sulphides, oxides and silicates can be described by the dissolution model.

The theory of dissolution presented in this series of papers was used to model the zeta potential of various representative minerals from the sulphide, oxides and silicates. The calculation of the potential difference across the Helmholtz layer during the dissolution of these minerals was combined with a simple Gouy–Chapman–Stern model of the electrified interface. The correspondence between the proposed model and experimental data reported in the literature is good, providing confidence in the proposed model and the proposed theory of dissolution. The proposed model is also in accordance with the thermodynamic model of reversible interfaces, such as AgI.