Fig. 11
From: Interaction mechanisms and kinetics of ferrous ion and hexagonal birnessite in aqueous systems
The concentration of released Mn2+ in reaction process of 20 mM Fe2+ and 1.0 g L−1 birnessite under different conditions: a pH 4.0–7.0, 25 °C, N2; b pH 5.5, 10–40 °C, N2; c pH 4.0–7.0, 25 °C, air