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Parameters of the Langmuir isotherms and the Freundlich for adsorption of Cu (II) ions into ZnO samples.
| Sample | Langmuir | Freundlich | ||||
|---|---|---|---|---|---|---|
| KL (L mg−1) | qmax (mg g−1) | r2 | KF (L g−1) | 1/n | r2 | |
| Zn-AL | 0.447 | 20.425 | 0.992 | 4.603 | 1.057 | 0.822 |
| Zn-ST | 1.562 | 10.952 | 0.999 | 5.939 | 3.868 | 0.705 |
