Table 2. Adsorption Kinetics Parameters for the Adsorption of AO and RB.
| value |
|||
|---|---|---|---|
| kinetic model | parameters | AO | RB |
| first-order: log(qe – qt) = log(qe) – (K1/2.303)t | K1 | 0.2975 | 0.3030 |
| qe (cal.) | 0.044 | 2.225 | |
| R2 | 0.5352 | 0.9196 | |
| second-order: t/qt = 1/k2qe2 + (1/qe)t | K2 | 1.160 | 1.242 |
| qe (cal.) | 3.13 | 3.15 | |
| R2 | 0.9900 | 0.9997 | |
| intraparticle diffusion: qt = Kidt1/2 + C | Kid | 0.1046 | 0.1680 |
| C | 2.75 | 2.58 | |
| R2 | 0.9319 | 0.8572 | |
| Elovich: qt = 1/β ln(αβ) + 1/β ln(t) | β | 8.76 | 5.29 |
| α | 1.40 | 2.26 | |
| R2 | 0.9458 | 0.9258 | |
| experimental adsorption capacity | qe(exp) | 0.134 | 2.125 |