*3.3. Thermal Properties*

DSC analysis was performed to investigate the thermal properties of AC and AC-OH. AC samples produced a higher endothermic peak. This peak detected around 90 ◦C corresponds to the dehydration of the adsorbents. In addition, AC displayed an exothermic peak from 410 to 500 ◦C associated with the degradation of cellulose, lignin, and hemicellulose. DSC thermograms of AC-OH (Figure 4) display two endothermic peaks around 90 and 400 ◦C associated with the dehydration and dihydroxylations of the date stem. All of these results correspond to the literature as well as SEM and IR data.

**Figure 4.** DSC analysis of AC and AC-OH.
