Fig. 8
From: A study on the dissolution rates of K-Cr(VI)-jarosites: kinetic analysis and implications
Assessment of Eqs. 2, 3 and 4 corresponding to the different controlling stages in the unreacted core model. a OH− medium; b H3O+ medium. XK is the potassium fraction in the solution. In the graphics, the slope is kexp and the intersection with t is the induction time (tind). kexp and the inverse of tind are the rate constants for every stage (both in min−1). The time necessary to achieve any degree of conversion is equal to the sum of the times required for each kinetic stage