GAB model parameters (Xm, K and C) at studied temperatures and the statistical parameters (r2 , SE, and MAE) are listed in Table 1. In both cases (desorption-adsorption), this model well fitted the experimental data, confirmed by the high coefficients of determination (r2 > 0.98), low values of standard error (SE < 2.4 g/100 g d.b.) and mean absolute error (MAE < 1.3 g/100 g d.b.).
.