Research Article
Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate
Figure 4
Raman spectra (a) standard synthetic birnessite (MnO2); (b) precipitate from MnSO4 solution; (c) precipitate from effluent A1; (d) precipitate from effluent A2. Trials at pH 7.0, 25°C ± 0.5, and 1 atm.