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