| Polyamine resin | Solvent | Time (min) | Ni(II) ion uptake (%) |
| 1.1 | MeOH | 60 | 33 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 92 | |
| 1.2 | MeOH | 60 | 4 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 94 | |
| 1.3 | MeOH | 60 | 64 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 95 | |
| 2.1 | MeOH | 60 | 47 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 95 | |
| 2.2 | MeOH | 60 | 2 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 93 | |
| 2.3 | MeOH | 60 | 37 |
| MeOH-CH2Cl2 (1:1 v/v) | 5 | 94 |