Table 6: Isotherm constants of Cd2+ ions adsorption at various temperatures.
T(K) | Langmuir | Freundlich | |||||
qm (mg/g) ±SD | b(L/mg) ±SD | R2 | n ±SD | 1/n | Kf (mg/g) ±SD | R2 | |
298 | 23.49 ± 0.12 | 0.11 ± 0.03 | 0.94 | 1.22 ± 0.09 | 0.81 | 2.22 ± 0.15 | 0.99 |
303 | 38.63 ± 0.15 | 0.07 ± 0.01 | 0.88 | 1.13 ± 0.05 | 0.88 | 2.41 ± 0.08 | 0.99 |
313 | 22.34 ± 0.11 | 0.16 ± 0.06 | 0.59 | 1.29 ± 0.07 | 0.77 | 3.00 ± 0.14 | 0.98 |
323 | 26.42 ± 0.19 | 0.10 ± 0.06 | 0.40 | 1.25 ± 0.06 | 0.80 | 2.46 ± 0.31 | 0.97 |