Table 7 Nonlinear kinetic model parameters for MB adsorption onto CK–CNF–Fe cryogel beads (C₀ = 150 mg L⁻¹, pH = 7, T = 298 K).
Model | Parameter | Symbol | Value | Unit | R² | χ² | RMSE |
|---|---|---|---|---|---|---|---|
Pseudo-first-order (Nonlinear) | Rate constant | k₁ | 0.071 | min⁻¹ | 0.935 | 3.84 | 1.95 |
Equilibrium adsorption capacity | qₑ,cal | 128.5 | mg g⁻¹ | — | — | — | |
Pseudo-second-order (Nonlinear) | Rate constant | k₂ | 0.018 | g mg⁻¹ min⁻¹ | 0.997 | 1.22 | 0.91 |
Equilibrium adsorption capacity | qₑ,cal | 146.7 | mg g⁻¹ | — | — | — |
