Table 2: Isotherm parameters for the removal of Zn(II) by CH at different temperatures.

Isotherm ParameterTemperature (K)
298308 318

Langmuir (mgg−1)10.93 11.5311.58
(Lmg−1)0.776 2.1212.181
0.94950.97740.9637

Freundlich (L  g−1 mg ) 4.0957.4137.58
2.0561.8681.889
0.9014 0.78280.7617

D-R (mgg−1)7.3511.0511.19
(moL2 KJ−2)−0.0755−0.0574−0.0491
(KJ moL−1)2.572.9513.191
0.81120.97660.9441