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Adsorption selectivity of PPTA-AM-70 toward Hg(II) at 25°C (pH 5.0).
| System | Mental ions | q (mmol g−1) | Selectivity coefficient* |
|---|---|---|---|
| Hg(II)-Pb(II) | Hg(II) | 1.36 | ∞ |
| Pb(II) | 0.00 | ||
| Hg(II)-Cu(II) | Hg(II) | 1.35 | ∞ |
| Cu(II) | 0.00 | ||
| Hg(II)-Ni(II) | Hg(II) | 1.36 | ∞ |
| Ni(II) | 0.00 | ||
| Hg(II)-Cd(II) | Hg(II) | 1.36 | ∞ |
| Zn(II) | 0.00 | ||
| Hg(II)-Ag(I) | Hg(II) | 1.31 | 10 |
| Ag(I) | 0.13 |
The selective coefficient was the ratio of adsorption capacities of metal ions in a binary system.
