| Cu(II) | |||
| pH | Initial concentration (Co) (mg/L) | Ce (mg/L) | % Removal |
| 1 | 20 | 15.91 | 20.45 |
| 2 | 20 | 13.05 | 34.75 |
| 3 | 20 | 10.22 | 48.90 |
| 4 | 20 | 7.29 | 63.55 |
| 5 | 20 | 5.59 | 72.05 |
| 6 | 20 | 6.99 | 65.05 |
| 7 | 20 | 8.98 | 55.10 |
| 8 | 20 | 10.94 | 45.30 |
| 9 | 20 | 13.18 | 34.10 |