| Sample | Pseudo-first-order kinetics model | Pseudo-second-order kinetics model | |||||
| qe,1 (mg/g) | k1 (1/min) | R2 | qe,2 (mg/g) | k2 (1/min) | R2 | ||
| Calcined PS | 10.5 | 0.014 | 0.425 | 37.3 | 3.3 | 0.984 | |
| The product | 60.7 | 0.0079 | 0.759 | 99.0 | 0.3 | 0.973 | |