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Non-linear adsorption isotherms (Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich) parameters for MB and Pb2+ adsorption on studied samples.
| Models | Parameters | Pollutants | |
|---|---|---|---|
| MB | Pb(II) | ||
| Langmuir | qm (mg/g) | 94.34 | 249.71 |
| KL (L/mg) | 0.06 | 5.11 | |
| r2 | 0.84 | 0.93 | |
| Freundlich | KF (mg(1−n)Ln/g) | 13.21 | 160.54 |
| n | 2.28 | 6.92 | |
| r2 | 0.91 | 0.88 | |
| Temkin | AT (L/g) | 1.90 | 392.55 |
| BT | 14.08 | 28.04 | |
| r2 | 0.83 | 0.92 | |
| Dubinin-Radushkevich | qm (mg/g) | 70.24 | 244.62 |
| E (KJ/mol) | 0.16 | 3.93 | |
| r2 | 0.68 | 0.92 | |
