Table 3. Calculated Parameters from the Fitting of the Adsorption Isotherms with Different Modelsa.
| dye/substrate | Langmuir |
Freundlich |
Dubinin–Radushkevich |
||||||
|---|---|---|---|---|---|---|---|---|---|
| KL (mg–1) | qm (mg g–1) | R2 | KF (mg g–1) | n | R2 | KD (mol2 kJ–2) | qD (mg g–1) | R2 | |
| EY/calc. fib. | 0.12 | 0.52 | 0.81 | 0.13 | 3.20 | 0.45 | 2.1 | 0.37 | 0.77 |
| EY/arag. tab. | 0.19 | 0.45 | 0.80 | 0.14 | 3.52 | 0.46 | 0.99 | 0.17 | 0.65 |
| BM/calc. fib. | 0.85 | 0.05 | 0.71 | 5.84 | 0.03 | 0.84 | 0.99 | 0.16 | 0.55 |
| BM/arag. tab. | 0.310 | 0.07 | 0.84 | 2.70 | 0.02 | 0.90 | 1.02 | 0.06 | 0.68 |
a
The R2 values from the isotherm model(s) that indicated the best fitting are highlighted in bold.