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Isotherm model parameters of the biosorption of Cu2+ ions onto R. damascena.
| Isotherms | Parameters | Values |
|---|---|---|
| Langmuir | qmax (mg/g) | 25.13 |
| b (L/mg) | 0.095 | |
| RL | 0.062–0.201 | |
| R2 | 0.979 | |
| Freundlich | 1/n | 0.313 |
| Kf (L/mg) | 5.98 | |
| R2 | 0.735 | |
| Temkin | A (L/mg) | 1.9 |
| b (J/mol) | 551.4 | |
| R2 | 0.807 | |
| Dubinin–Radushkevich | qo (mg/g) | 21.1 |
| β × 10–6(mol2/J2) | 6.0 | |
| E (KJ/mol) | 9.13 | |
| R2 | 0.926 | |
| Jovanovic | qmax (mg/g) | 11.17 |
| KJ (L/g) | 0.01 | |
| R2 | 0.589 |
