Research Article
Biosorption of Pb(II) from Aqueous Solution Using Cow Hooves: Kinetics and Thermodynamics
Table 1
FTIR spectral characteristics of cow hoof before and after Pb(II) biosorption.
| FTIR peak | Frequency (cm−1) before adsorption | Frequency (cm−1) after adsorption | Difference | Assignment |
| 1 | 3754.28 | 3771.42 | −17.14 | –NH stretching | 2 | 3314.00 | 3457.14 | −143.14 | Bonded –OH group | 3 | 2931.42 | 2942.85 | −11.43 | Aliphatic C–H groups | 4 | 2365.71 | 2365.71 | — | S–H stretching | 5 | 1658.60 | 1649.48 | 9.12 | C=O stretching of an amide | 6 | 1530.58 | 1535.19 | −4.61 | Amino/nitro compound | 7 | 1393.00 | 1390.15 | 2.85 | Nitro compound | 8 | 1239.11 | 1239.11 | — | C–N stretching | 9 | 1039.63 | 1059.58 | −19.95 | C–O stretching |
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