Metals | Extraction efficiency (%) Single-metal leach | Extraction efficiency (%) Multi-metal leach | ||||||||
EDTA | EDDS | Hacac | CA | TA | EDTA | EDDS | Hacac | CA | TA | |
Cd | 24 | 20 | 1 | 9 | 2 | 18 | 26 | 7 | 11 | 4 |
Cu | 12 | 11 | 23 | 5 | 3 | 10 | 18 | 10 | 10 | 1 |
Ni | 5 | 3 | 5 | 3 | 1 | 9 | 14 | 17 | 9 | 2 |
Pb | 16 | 20 | 2 | 12 | 3 | 19 | 30 | 3 | 10 | 3 |
Zn | 9 | 12 | 10 | 9 | 3 | 10 | 18 | 14 | 8 | 2 |