Table 4. Kinetic Parameters in Adsorption Studies Using MB (Concentration 0.0156–0.0781 mol/m3) at pH = 7, PA (0.000010 kg) at 298 K, Adsorption Capacity at Equilibrium qe (mol/kg), First-Order Rate Constant k1 (min–1), Second-Order Rate Constant k2 (kg/mol min), and Coefficient of Correlation R2.
| pseudo
first order |
pseudo
second order |
|||||
|---|---|---|---|---|---|---|
| Co (mol/m3) | qe (mol/kg) | k1 (min–1) | R2 | qe (mol/kg) | k2 (kg/mol min) | R2 |
| 0.0156 | 0.0815 | 0.0190 | 0.9512 | 0.0962 | 0.1403 | 0.9546 |
| 0.0312 | 0.1643 | 0.0214 | 0.9651 | 0.1828 | 0.0943 | 0.9852 |
| 0.0468 | 0.2585 | 0.0218 | 0.9665 | 0.2791 | 0.0576 | 0.9860 |
| 0.0625 | 0.3029 | 0.0219 | 0.9488 | 0.3473 | 0.0675 | 0.9892 |
| 0.0781 | 0.3217 | 0.0230 | 0.9663 | 0.4168 | 0.0826 | 0.9954 |