Study of the Process of Zinc Sulfide Dissolution in the Presence of Oxygen

Abstract

The dissolution process of zinc sulfide in sulfuric acid, particularly in the presence of oxygen, is critical for various industrial applications. This study investigates the dissolution kinetics of zinc sulfide in aqueous sulfuric acid under oxygenated conditions, simulating industrial leaching processes using an autoclave. The experimental results explore the influence of parameters such as initial mass of zinc sulfide, oxygen partial pressure, temperature, and sulfuric acid concentration on the dissolution kinetics. The study reveals complex interplays between dissolution kinetics, chemical reactions, and environmental factors, offering insights into optimizing industrial processes for efficiency and sustainability. Key findings include the direct proportionality between zinc sulfide dissolution rate and oxygen partial pressure, as well as the dependence of dissolution kinetics on temperature, acidity, and the presence of hydrogen sulfide in the solution. Additionally, a kinetic model is developed to describe the dissolution process, incorporating factors such as temperature, initial concentration of sulfuric acid, and oxygen partial pressure, enhancing our understanding of the underlying mechanisms governing the dissolution process and its industrial applications.