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Calculated isotherm parameters and error functions for DR71 and Pb(II) ions
| Freundlich | Langmuir | ||
|---|---|---|---|
| DR71 | |||
| R2 | 0.9904 | R2 | 0.9999 |
| χ2 | 0.22 | χ2 | 0.02 |
| RSS | 1.11 | RSS | 0.11 |
| KF | 5.54 ± 0.55 | KL | 0.07 ± 0.00 |
| N | 1.63 ± 0.11 | qm | 54.44 ± 1.58 |
| RL | 0.19–0.59 | ||
| Pb(II) | |||
| R2 | 0.9984 | R2 | 0.9998 |
| χ2 | 2.56 | χ2 | 1.81 |
| RSS | 10.24 | RSS | 7.24 |
| KF | 5.02 ± 0.51 | KL | 0.01 ± 5.76 × 10−4 |
| N | 1.97 ± 0.08 | qm | 126.43 ± 4.47 |
| RL | 0.25–0.67 | ||
