Indirect Manganese Removal by Stenotrophomonas sp. and Lysinibacillus sp. Isolated from Brazilian Mine Water

Figure 5

Role of pH in manganese oxidation. K medium that was supplied with or without 50 mg·L⁻¹ Mn(II) at different pH values (7.5–9.0) was maintained at 30°C and under constant stirring (150 min⁻¹) for seven days. The samples were collected, and 0.04% LBB reagent was added to them. Manganese oxidation was indicated by the sample color turning blue. MK: K medium; LBB: Leucoberbelin blue I reagent; MnCO₃: manganese carbonate; MnO₂: manganese oxide.