Table 2.
The parameters of the adsorption isotherm model for Pb (II) by CuO/PANI.
| Model | Parameter | Value | Model | Parameter | Value |
|---|---|---|---|---|---|
|
Langmuir qe= |
qmax (mg. g− 1) | 421.14 |
Freundlich qe = Kf |
1/n | 0.36 |
| KL | 0.041 | KF | 66.91 | ||
| R2 | 0.73 | R2 (-) | 0.91 | ||
|
Langmuir-Freundlich qe= |
MLF (mg. g−1) | 3523 | Dubinin–Radushkevich | qm (mg. g− 1) | 377.15 |
| LF | 2.8E-05 | Kad | 0.003 | ||
| LF | 0.377 | R2 (-) | 0.62 | ||
| R2 (-) | 0.91 | ||||
|
Khan qe= |
qmax (mg. g− 1) | 2.94 |
Sips qe= |
qmax (mg. g− 1) | 281,219 |
| bK | 5637 | Ks | 0.0002 | ||
| aK | 0.638 | 1/n | 0.3612 | ||
| R2 (-) | 0.91 | R2 (-) | 0.91 | ||
|
Redlich-Peterson qe= |
KR | 324,512 |
Toth qe= |
Kt | 166,591 |
| aR | 4850 | aT | 3818 | ||
| β | 0.638 | z | 0.643 | ||
| R2 (-) | 0.91 | R2 (-) | 0.91 | ||
|
Baudu qe= |
qm (mg. g− 1) | 421.15 |
Fritz-Schlunder qe= |
qmFSS (mg. g− 1) | 65.09 |
| b0 | 0.041 | K1 | 1.028 | ||
| x | 0 | K2 | 0 | ||
| y | 0 | m1 | 0.362 | ||
| R2 (-) | 0.73 | ||||
| m2 | 0 | ||||
| R2 (-) | 0.92 |
