Table 4.
Kinetics results applied on the adsorption of Acid Blue 25.
| Kinetic Models | Acid Blue 25 Dye (Linear Form) |
Acid Blue 25 Dye (Nonlinear Form) |
|---|---|---|
| Pseudo-first-order | Fe2O3@RH Composites | Fe2O3@RH Composites |
| K1 (g/mg.min) | −0.003 | 0.24 |
| qe1 (mg/g) | 3.30E6 | 14.25 |
| R2 | 0.9 | 0.99 |
| Pseudo-second-order | Fe2O3@RH Composites (Type I) | Fe2O3@RH Composites |
| K2 (g/mg.min) | 0.072 | 0.0473 |
| qe2 (mg/g) | 14.72 | 14.82 |
| R2 | 0.999 | 0.99 |
| Pseudo-second-order | Fe2O3@RH Composites (Type II) | Fe2O3@RH Composites |
| K2 (g/mg.min) | 0.043157516 | - |
| qe2 (mg/g) | −1.555209953 | - |
| R2 | 0.88 | - |
| Pseudo-second-order | Fe2O3@RH Composites (Type III) | Fe2O3@RH Composites |
| K2 (g/mg.min) | 0.1667 | - |
| qe2 (mg/g) | 9.458 | - |
| R2 | 0.87 | - |
| Pseudo-second-order | Fe2O3@RH Composites (Type IV) | Fe2O3@RH Composites |
| K2 (g/mg.min) | 0.128 | - |
| qe2 (mg/g) | 10.72 | - |
| R2 | 0.87 | - |
| Elovich | Fe2O3@RH Composites | Fe2O3@RH Composites |
| α | 268539.7755 | 266024.169 |
| β | 1.142857143 | 1.141 |
| R2 | 0.96 | 0.99 |
| Intraparticle Diffusion | Fe2O3@RH Composites | Fe2O3@RH Composites |
| C | 12.09 | 1.11 |
| Kdiff | 0.33 | 5.38 |
| R2 | 0.94 | 0.93 |