Research Article
Removal of Toxic Metal Ions from Water Using Chelating Terpolymer Resin as a Function of Different Concentration Time and pH
Table 2
IR frequencies of 4-ASAUF terpolymer.
| | Observed band frequencies (cm−1) | Vibrational mode | Expected band frequencies (cm−1) |
| | 3351.0 b, st | −OH (phenolic) | 3200–3400 | | 3001.2 st, w | –NH– (amino) | >3000 | | 2891.3 m, st | –CH2– stretching methylene bridge | 2800–2950 | | 1450.6–1540.4 m | >C=C< in aromatics | 1400–1600 | | 1269.1 st | Carboxylic acid –COOH | 1250–1300 | | 1587.4 st | Ar–NH2 (amine) | 1560–1640 | | 1207.44 sh, m | C–O str. in phenol | 1200 | 800.4 sh, w
848.8 sh, w | Pentasubstituted benzene ring | 800–950 |
|
|
Sh: sharp; b: broad; st: strong; m: medium; and w: weak.
|
