Fig. 7

a. Leaching studies at 298 K for 60 min b. Leaching studies at 298 K for 120 min c. Leaching studies at 298 K for 180 min at 2 mol/L acids.

a. Leaching studies at 298 K for 60 min b. Leaching studies at 298 K for 120 min c. Leaching studies at 298 K for 180 min at 2 mol/L acids.