Table 3. Kinetic Parameters Calculated from Pseudo-First-Order and Pseudo-Second-Order Kinetic Models and the Intraparticle Diffusion Model.
|
C0 (mg L–1) |
|||||
|---|---|---|---|---|---|
| parameters | 10 | 20 | 30 | 40 | 50 |
| pseudo-first-order | |||||
| k1 (min–1) | 0.0315 | 0.0119 | 0.0106 | 0.0097 | 0.0156 |
| qe (mg g–1, cal) | 26.73 | 44.28 | 69.27 | 99.46 | 119.99 |
| R2 | 0.9785 | 0.9865 | 0.9875 | 0.9793 | 0.9778 |
| ARE (%) | 3.3615 | 6.0051 | 7.2607 | 10.9873 | 11.4154 |
| pseudo-second-order | |||||
| k2 (g mg–1 min–1) | 2.00 × 10–3 | 3.50 × 10–4 | 2.15 × 10–4 | 1.34 × 10–4 | 1.74 × 10–4 |
| qe (mg g–1, cal) | 28.12 | 48.39 | 75.15 | 108.50 | 130.64 |
| R2 | 0.9930 | 0.9839 | 0.9959 | 0.9933 | 0.9925 |
| ARE (%) | 1.9533 | 7.8465 | 4.1475 | 5.5008 | 6.7315 |
| intraparticle diffusion | |||||
| kid (mg g–1 min–1/2) | 0.155 | 0.393 | 0.599 | 1.173 | 1.417 |
| intercept (mg g–1) | 21.720 | 30.264 | 48.829 | 63.468 | 81.657 |
| R2 | 0.448 | 0.803 | 0.529 | 0.726 | 0.676 |
| qe (mg g–1, exp) | 28.24 ± 0.57 | 48.05 ± 1.38 | 73.26 ± 1.54 | 108.80 ± 3.01 | 134.36 ± 7.19 |
| removal efficiency (%) | 56% | 48% | 49% | 54% | 54% |