Fig. 10From: Fe(II) reduction of pyrolusite (β-MnO2) and secondary mineral evolutionMn released from MnO2 to solution after exposure to ~ 2.4 mM Fe(II), expressed as mol%. Data are plotted as cumulative reaction time, and times of resuspension at 75 and 150 min are indicated for suspension treatments with additional Fe(II) (circles) and Fe-free buffer (squares)Back to article page