Research Article
Removal of Toxic Metal Ions from Water Using Chelating Terpolymer Resin as a Function of Different Concentration Time and pH
Table 3
1H-NMR spectral data of 4-ASAUF terpolymer.
| Nature of protons assigned | Expected chemical shift (δ) ppm | Observed chemical shift (δ) ppm of copolymer |
| 1H, phenolic –OH (S) | 3.5–9 | 4.7 | 1H, Ar–H (S) | 6.5–9 | 7.5 and 8.1 | 2H, Ar–NH2 (S) | 3.2–6 | 3.8 | 1H, Ar–COOH (S) | 10–13 | 8.2 | 1H, CH2–NH–C=O (S) | 5–8 | 7.1 and 7.2 | 2H, Ar–CH2–NH in Urea moiety (S) | 2.5–3.5 | 3.9 | 2H, NH–CH2 (S) | 1.5–3.5 | 2.70 |
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S: stand for singlet.
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