| pH | Experiment I | Experiment II | Experiment III |
| % Removed | % Removed | % Removed | |
| 2. 0 | 50.019 | 49.776 | 51.007 |
| 4. 0 | 64.992 | 58.639 | 62.564 |
| 6. 0 | 89.064 | 88.568 | 89.013 |
| 8.0 | 98.472 | 97.976 | 97.663 |
| 10.0 | 93.302 | 92.934 | 93.218 |