reported that sphalerite reactivity depends on
its iron content, i.e., the more iron in the solution, the easier the sphalerite
lattice opens up, while the mechanism could be that ferric ions
generate ferrous ions (Eq. (11)), which ions in turn generate H2O2
(Eqs. (1) and (2)) and H2O2 oxidizes sphalerite (Eq. (12)) as shown in
Fig. 14b