Table 5.
Adsorption isotherm constants for Cu2+ adsorbed by different adsorbents.
Model | Coefficient | S-1 | S-2 | S-3 | S-4 |
---|---|---|---|---|---|
Langmuir | qmax | 66.16 | 74.82 | 88.85 | 122.76 |
b | 0.023 | 0.027 | 0.042 | 0.040 | |
R2 | 0.9936 | 0.9947 | 0.9874 | 0.9892 | |
Freundlich | Kf | 5.99 | 8.22 | 14.91 | 18.88 |
n | 0.44 | 0.41 | 0.34 | 0.36 | |
R2 | 0.9741 | 0.9709 | 0.9359 | 0.9614 |