Table 3. Dissolution of Metal Ions during the Catalytic Ozonation Degradation of Ciprofloxacin by the Mn–Ce/Al2O3 Catalyst.
| the reused times | Mn ion concentration (mg L–1) | Ce ion concentration (mg L–1) |
|---|---|---|
| 1 | 0.0042 | 0.0024 |
| 2 | 0.0031 | 0.0017 |
| 3 | 0.0035 | 0.0019 |
| 4 | 0.0016 | 0.0016 |
| 5 | 0.0021 | 0.0012 |