Figure 9.

Eh-pH diagram showing aquatic species and solid phases (s) of chromium and manganese at 25°C and 1 atm after data in [37,38]. Red fields are for Cr and blue fields for Mn. Cr = 0.1 ppm, Mn = 0.1 ppm, HCO₃^- = 100 ppm. The star indicates the system in the present study.