Research Article
Oxidative Precipitation of Manganese from Acid Mine Drainage by Potassium Permanganate
Table 2
Removal percentages of chief components from AMD effluents A1 and A2 over pH adjustment and oxidative precipitation with KMnO4.
| | Stage | Removals (%) at
pH adjustment step* | Removals (%) at oxidative precipitation step* | | Effluent | A1 | A2 | A1 | A2 | | pH | 3.0 | 5.0 | 7.0 | 3.0 | 5.0 | 7.0 | 3.0 | 5.0 | 7.0 | 3.0 | 5.0 | 7.0 |
| | Al | 1.6 | 16.8 | 83.2 | 6.1 | 41.9 | 97.5 | 10.4 | 52 | 83.2 | 2.3 | 26.2 | 1.7 | | Ca | 2.4 | 2.4 | 9.8 | 0.9 | 3.1 | 19.5 | 0 | 12.5 | 14.4 | 20.6 | 17.2 | 5.4 | | F | 65.6 | 15.3 | 68.6 | 61.7 | 36.4 | 62.0 | 0 | 56.4 | 8.7 | 25.7 | 0 | 11.1 | | Fe |
24.1 | 24.1 | 85.5 | 0 | 100 | 100 | 75.9 | 55.3 | 14.5 | 100 | 0 | 0 | | Mn | 0 | 12.3 | 22.3 | 0 | 0 | 19.5 | 97.4 | 83.1 | 77.6 | 97.9 | 96.2 | 79.5 | | Zn | 29.3 | 29.4 | 29.5 | 7.1 | 11.2 | 69.6 | 19.8 | 21.8 | 70.5 | 22.4 | 18.3 | 30.4 | | U | 29.5 | 24.2 | 29.5 | 26.3 | 21.1 | 21.1 | 17.9 | 23.2 | 17.9 | 0 | 0 | 26.3 |
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Removals percentages are related to initial concentrations presented in Table 1.
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