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Stripping of selenium(IV) with different concentrations of various stripping agents after its extraction with 0.4 mol/L aliquat 336 in kerosene at an O/A phase ratio of 1:1 and at 25 °C
| Stripping agent | Stripping percentage, % |
|---|---|
| HCl, mol/L | |
| 0.1 | 3.15 |
| 7 | 2.52 |
| HNO3, mol/L | |
| 0.1 | 5.66 |
| 1 | 10.063 |
| 4 | 24 |
| 7 | 60 |
| H2SO4, mol/L | |
|
0.1 2.0 |
2.52 0.63 |
| NaOH, mol/L | |
| 0.1 | 2.52 |
| 0.5 | 10.063 |
| 1 | 9 |
|
Thiourea, mol/L 0.5 1 |
6.3 10.06 |
|
K2S2O7, mol/L 0.5 1 |
12.58 28.3 |
| Ammonia ratio | |
| 1:5 | 6.29 |
