Infrared spectroscopic and thermal analysis of prepared cation exchangers from cellulosic materials

Cadmium sorption characteristics of phosphorylated sago starch-extraction residue

“…There was a band at 1200 cm −1 corresponding to the P O bonds [30] and a shoulder at 980 cm −1 attributed to C-O-P stretching [31]. The intensities of the bands at 1200 and 980 cm −1 were compared to those of the untreated extraction residue using the relative absorbance method described by Nada et al [32]. The relative absorbance (band intensity of any group/band intensity at 1325 cm −1 , which corresponds to C-H rocking for a cellulose ring [33,34]) of the bands at 1200 and 980 cm −1 for P-SR WA were higher than those of the untreated extraction residue ( Table 2).…”