Table 1.
Kinetics parameters of the pseudo-first-order, pseudo-second-order, and intraparticle diffusion models for the adsorption of Direct Blue 78 onto eggshell.
| PFOM 1 | Eggshell | |||
| C0 (mg/L) | qeexp (mg/g) | qecal (mg/g) | k1 (min−1) | R2 |
| 25 | 1.969 | 0.773 | 0.036 | 0.813 |
| 50 | 3.875 | 2.905 | 0.028 | 0.800 |
| 100 | 6.618 | 6.742 | 0.032 | 0.995 |
| 150 | 8.804 | 8.652 | 0.025 | 0.995 |
| 200 | 10.329 | 12.838 | 0.030 | 0.938 |
| 250 | 11.979 | 14.125 | 0.027 | 0.938 |
| 300 | 12.766 | 13.658 | 0.024 | 0.968 |
| PSOM 2 | ||||
| C0 (mg/L) | qeexp (mg/g) | qecal (mg/g) | k2 (g/mg min) | R2 |
| 25 | 1.969 | 1.969 | 0.257 | 1 |
| 50 | 3.875 | 3.874 | 0.066 | 1 |
| 100 | 6.618 | 6.618 | 0.022 | 1 |
| 150 | 8.804 | 8.803 | 0.0129 | 1 |
| 200 | 10.329 | 10.331 | 0.0093 | 1 |
| 250 | 11.979 | 11.979 | 0.0069 | 1 |
| 300 | 12.766 | 12.771 | 0.0061 | 1 |
| IDM 3 | ||||
| C0 (mg/L) | qeexp (mg/g) | (C) (mg/g) | ki (mg/g min1/2) | R2 |
| 25 | -- | 1.414 | 0.053 | 0.704 |
| 50 | -- | 1.722 | 0.190 | 0.778 |
| 100 | -- | 1.618 | 0.462 | 0.869 |
| 150 | -- | 1.111 | 0.682 | 0.961 |
| 200 | -- | 0.424 | 0.888 | 0.951 |
| 250 | -- | 0.651 | 0.999 | 0.974 |
| 300 | -- | 0.896 | 1.026 | 0.995 |
1 PFOM: pseudo-first-order model; 2 PSOM: pseudo-second-order model; 3 IDM: intraparticle diffusion model.