Eluent | Concentration (mol L−1) | Recovery (%) | ||||
---|---|---|---|---|---|---|
Pb(II) | Ni(II) | Cr(III) | Cu(II) | Cd(II) | ||
HNO3 | 0.1 | 93.3 | 88.5 | 88.7 | 89.9 | 92.5 |
0.3 | 96.7 | 95.7 | 94.1 | 95.7 | 97.8 | |
0.5 | 98.4 | 99.6 | 97.7 | 98.1 | 99.7 | |
H2SO4 | 0.1 | 78.5 | 83.4 | 86.7 | 92.4 | 87.5 |
0.3 | 80.3 | 87.1 | 88.9 | 96.5 | 89.4 | |
0.5 | 84.2 | 89.9 | 91.2 | 98.7 | 91.4 | |
HCl | 0.1 | 84.6 | 80.2 | 78.6 | 83.5 | 88.4 |
0.3 | 86.7 | 82.4 | 81.1 | 88.8 | 91.2 | |
0.5 | 88.2 | 86.9 | 84.0 | 91.2 | 96.3 |