Table 4 Langmuir, Freundlich, Temkin, and Dubinin–Radushkevich isotherm constants for the adsorption of CV dye onto produced samples
Adsorbent | Langmuir isotherm model | Freundlich isotherm model | ||||||
|---|---|---|---|---|---|---|---|---|
qm (mg/g) | KL (L/mg) | RL | R2 | 1/n | n | KF (mg/g)(L/mg)1/n | R2 | |
UTPS | 4.4 | 0.06 | 0.45 | 0.976 | 0.58 | 1.7 | 0.4 | 0.917 |
UTPS/ISC2 | 4.6 | 0.07 | 0.26 | 0.9807 | 0.55 | 1.81 | 0.5 | 0.91 |
UTPS/ISC2/SICNCs | 7.6 | 0.1 | 0.2 | 0.9881 | 0.56 | 1.79 | 0.9 | 0.9076 |
|  | Dubinin–Radushkevich isotherm model | Temkin isotherm model | ||||
|---|---|---|---|---|---|---|
qDR (mg/g) | KDR (mol2/J2) | R2 | bT (kJ/mol) | KT (L/mg) | R2 | |
UTPS | 3 | 4 × 10–6 | 0.8759 | 2.43 | 0.556 | 0.9564 |
UTPS/ISC2 | 3.16 | 3 × 10–6 | 0.8788 | 2.34 | 0.68 | 0.9598 |
UTPS/ISC2/SICNCs | 5 | 1 × 10–6 | 0.8515 | 1.5 | 1.1 | 0.9629 |