Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate

Figure 5

Micrographs, 8000X, of precipitates obtained by manganese oxidation by KMnO₄ at pH 7.0: (a) MnSO₄ solution; (b) effluent A1; (c) effluent A2.

(a)

(b)

(c)