Modeling of copper(II) oxide dissolution in sulfuric acid solutions in the presence of ammonia and complexones

Abstract

The effect of ammonia and complexones on the kinetics of copper(II) oxide dissolution in aqueous solutions of sulfuric acid is studied. It is found that addition of complexones and ammonia to acidic media decreases the dissolution rate. Modeling of the dissolution kinetics shows that the inhibiting effect of complexing agents is caused by a decrease in the concentration of surface intermediate compounds, which are transferred into the solution.