Different amounts of Co/Mo-LDHs (0.05, 0.10, 0.15, 0.20,
0.25, 0.30 and 0.35 g/L) were added to a series of 100 mL of
manganese solutions with initial concentration of 145 mg/L
at pH 5 and stirring rate of 160 rpm for contact time 60 min
to reach the equilibrium.