Isotherm Name Isotherm equation Isotherm constant sample (A) sample (B) Langmuir qm=30.23 20.69 b=0.045 0.041 R-square=0.995 0.986 RMSE=0.435 0.487 Unilan qm=30.24 20.44 b=0.045 0.041 s=0.0002 0.0008 R-square=0.995 0.986 RMSE=0.456 0.512 Toth qm=20.4 11.77 b=0.049 0.05 n=2.212 3.825 R-square=0.998 0.998 RMSE=0.258 0.158 Sips qm=24.22 13.21 b=0.035 0.015 n=0.792 0.575 R-square=0.997 0.999 RMSE=0.336 0.123

Table 2: Isotherm equations used to model the adsorption experimental data and their parameter.