Table 2.
Kinetic parameters for the adsorption of 40 mg/L AB129 onto AS
| Model | Equation | Parameters | Value |
|---|---|---|---|
|
Pseudo-first-order kinetic |
Log (qe ‐ qt) = log(qe) ‐ k1/2.303t |
k1(1/min) |
0.210 |
| qe (calc) (mg/g) |
1.096 |
||
| R2 |
0.912 |
||
|
Pseudo-second-order kinetic |
(t/qt) = 1/(k2qe2) + 1/qe(t) |
k2 (g/(mg min)) |
0.313 |
| qe (calc) (mg/g) |
2.532 |
||
| R2 |
0.994 |
||
| H (mg/(g min)) |
1.731 |
||
|
Intraparticle diffusion |
qt = Kdift1/2 + C |
Kdiff (mg/(g min1/2)) |
0.519 |
| C (mg/g) |
1.221 |
||
| R2 |
0.949 |
||
|
Elovich |
qt = 1/β ln(αβ) + 1/β ln(t) |
β (g/mg) |
3.068 |
| α (mg/(g min)) |
10.21 |
||
| R2 |
0.973 |
||
| qe (exp) (mg/g) | 2.356 | ||