TABLE 3.
Comparison of Langmuir and Freundlich isotherm models for different concentrations of adsorbents and pseudo 1st and 2nd order in terms of their R2-values for the treatments (T1 = 1% bentonite, T2 = 2% bentonite, T3 = 3% bentonite, T4 = 4% bentonite, T5 = 5% bentonite, T6 = 6% bentonite).
| Treatments | Langmuir |
Freundlich |
1st order |
2nd order |
||||||
| Qmax (mg/kg) | R 2 | Q(max) (mg/kg) | R 2 | K1 | R 2 | qe (mg/g) | K2 | R 2 | qe (mg/g) | |
| T1 | 12.99 | 1 | 3.07 | 0.93 | 0.01 | 0.80 | 17.40 | 0.78 | 1 | 20.1 |
| T2 | 52.91 | 1 | 3.09 | 0.91 | 0.01 | 0.88 | 1.34 | 0.77 | 1 | 94.14 |
| T3 | 36.99 | 1 | 3.05 | 0.94 | 0.01 | 0.78 | 0.97 | 0.78 | 1 | 54.27 |
| T4 | 14.99 | 1 | 3.05 | 0.93 | 0.01 | 0.79 | 0.74 | 0.57 | 1 | 43.74 |
| T5 | 16.96 | 1 | 3.05 | 0.98 | 0.01 | 0.90 | 7.14 | 0.76 | 1 | 27.17 |
| T6 | 10.93 | 1 | 3.06 | 0.94 | 0.01 | 0.88 | 0.14 | 0.64 | 1 | 23.43 |