Table 5 Parameters of Langmuir, Freundlich, Temkin and Dubinin-Radushkevich (D-R) isotherm models for the adsorption of lead onto the three selected biosorbents (O: O. mykiss scales; R: R. kutum scales; C: C. glaucum shells).
Biosorbents | Isotherm model | Parameter | Value |
|---|---|---|---|
R | Langmuir | qmax (mg/L) | 60.61 |
KL (L/g) | 1.019 | ||
RL range | 0.01–0.03 | ||
R2 | 0.9934 | ||
Freunlich | n | 2.67 | |
Kf (L/g) | 7.6722 | ||
R2 | 0.1844 | ||
Temkin | AT (L/g) | 12.66 | |
BT | 297.964 | ||
R2 | 0.5062 | ||
D-R | qmax | 131.7648 | |
K | 0.0048 | ||
R2 | 0.8761 | ||
C | Langmuir | qmax (mg/L) | 40.82 |
KL (L/g) | 0.09 | ||
RL range | 0.07–0.62 | ||
R2 | 0.3874 | ||
Freunlich | n | 0.46 | |
Kf (L/g) | 1.0204 | ||
R2 | 0.9860 | ||
Temkin | AT (L/g) | 1.13 | |
BT | 76.801 | ||
R2 | 0.8334 | ||
D-R | qmax | 6.6004 | |
K | 0.0002 | ||
R2 | 0.7121 | ||
O | Langmuir | qmax (mg/L) | 104.17 |
KL (L/g) | 0.152 | ||
RL range | 0.04–0.18 | ||
R2 | 0.9845 | ||
Freunlich | n | 0.68 | |
Kf (L/g) | 2.3396 | ||
R2 | 0.7386 | ||
Temkin | AT (L/g) | 1.13 | |
BT | 95.306 | ||
R2 | 0.9835 | ||
D-R | qmax | 35.2419 | |
K | 0.0034 | ||
R2 | 0.9377 |
