Table 1.
Adsorption capacity and adsorption ratio of ten metal ions with an initial concentration of 200 mg·L−1 for each metal ion at 25 °C for 24 h with a poly-2-mercapto-1,3,4-thiadiazole (PTT) sorbent dosage of 1.0 g·L−1.
| Metal Ion Solutions | Adsorption Capacity (mg·g−1) | Adsorption Ratio (%) | Theoretical Selectivity Coefficient | |
|---|---|---|---|---|
| Ag+ | Hg2+ | |||
| AgNO3 | 193.1 | 96.8 | 1.00 | 0.97 |
| Hg(NO3)2 | 186.9 | 94.8 | 1.03 | 1.00 |
| Zn(NO3)2 | 24.8 | 12.4 | 7.79 | 7.54 |
| Cd(NO3)2 | 24.5 | 12.3 | 7.88 | 7.63 |
| Ni(NO3)2 | 12.0 | 6.0 | 16.09 | 15.58 |
| Cr(NO3)3 | 10.1 | 5.1 | 19.12 | 18.50 |
| Pb(NO3)2 | 70.6 | 35.9 | 2.74 | 2.65 |
| Cu(NO3)2 | 15.6 | 7.9 | 12.38 | 11.98 |
| Fe(NO3)3 | 27.6 | 13.8 | 7.00 | 6.77 |
| Co(NO3)2 | 9.9 | 5.2 | 19.51 | 18.88 |