[H+] | Extraction Efficiency, % | ||
Cu | Co | Ni | |
1 | 84.5 | 86.8 | 87.2 |
3 | 89.0 | 93.5 | 94.2 |
5 | 92.5 | 95.6 | 96.2 |
7 | 91.0 | 92.0 | 94.5 |