Fig. 7From: A study on the dissolution rates of K-Cr(VI)-jarosites: kinetic analysis and implicationsX ray diffraction patterns at different reaction times; a OH− medium (0.05 mol L−1, T = 30 °C, pH 12.44, d0 = 38–44 µm, CrO −24 = 0.77 mol); b H3O+ medium (0.3 mol L−1, T = 50 °C, pH = 0.50, d0 = 38–44 µm, CrO −24 = 0.77 mol)Back to article page