Structural characterization by infrared spectroscopy
The Fourier Transform Infrared (FTIR) spectrum of ASAC is
shown in Fig. 2. The spectra of the adsorbent display a number
of absorption peaks, indicating that many functional
groups are present in the adsorbent (Abbas, 2014). Peaks are
observed at 3436, 2929, 1732, 1599 and 1508 cm−1. The band
in the region (3122–3680 cm−1) is attributed to hydroxyl ( OH)
groups (libber and intermolecular hydrogen band). The bands
at 2929 and 1508 cm−1 suggest the presence of ( CH2) groups
(symmetric and antisymetric) while the band in the region
(1600–1665 cm−1) indicates the presence of groups (C H, C C