Table 10 The kinetic constants of the different kinetic relations.
Kinetic model | Parameters | 418 (mg/L) | 600 (mg/L) | 718 (mg/L) |
|---|---|---|---|---|
Pseudo-first-order | qe,cal (mg/g) | 28.605 | 31.661 | 34.147 |
k1 (1/min) | 0.0263 | 0.0233 | 0.0221 | |
R2 | 0.9293 | 0.9641 | 0.9650 | |
Pseudo-second-order | qe,cal (mg/g) | 36.496 | 45.248 | 49.019 |
k2 (g/mg min) | 5.22 × 10–4 | 2.91 × 10–4 | 2.96 × 10–4 | |
R2 | 0.9861 | 0.9553 | 0.957 | |
Elovich | α (mg/g min) | 1.519 | 1.396 | 1.661 |
β (g/mg) | 0.124 | 0.105 | 0.0981 | |
R2 | 0.9725 | 0.9419 | 0.9418 | |
Intra-particle diffusion (step 1) | ki1 | 2.554 | 2.960 | 3.110 |
I | − 1.2075 | − 3.6659 | − 2.550 | |
R2 | 0.9964 | 0.9815 | 0.9872 | |
Intra-particle diffusion (step 2) | Ki2 | 0.3297 | 0.1705 | 0.3297 |
I | 28.672 | 26.873 | 28.672 | |
R2 | 0.9649 | 0.9600 | 0.9649 |
