Predicted inactivation time (>99.9% reduction) of Escherichia coli (HCB1) and Legionella pneumophila resulting from chemical dissolution of Cu-based compounds and mixtures in artificial perspiration. Data obtained from regression fit of Figure 2. Chemical equilibria between compounds considered and Cu cation concentration calculated from Figure 3. Equilibrium pH is indicated for each. Note difference in time scale from left and right axis. Time required to inactivate a bacteria or virus is estimated from the equilibrium Cu ion concentrations and their associated disinfection kinetics. Inactivation is assumed to follow kinetics from viability experiments of planktonic bacteria in suspension with dissociated CuCl₂ in artificial perspiration (E. coli) and deionized water (L. pneumophila).