Table 2 Changes of IR peaks before and after metal biosorption, and functional groups for metal adsorption.
Treatment | Structure adscription and stretching pattern of stretching vibration peaks | ||
|---|---|---|---|
Wave number (cm−1) | PVA-SA-conidia beads before Cu biosorption | PVA-SA-conidia beads after Cu biosorption | |
3392.56 | 3420.39 | -OH | |
2955.39 | No peak | CH3; Antisymmetric stretching vibration | |
2927.16 | 2927.32 | CH2; Antisymmetric stretching vibration | |
No peak | 1733.42 | C = O | |
1318.63 | No peak | CH2; Outside rocking vibration | |
No peak | 1259.49 | PO3; Antisymmetric stretching vibration | |
890.84 | 882.09 |
| |
PVA-SA-conidia before Pb biosorption | PVA-SA-conidia after Pb biosorption | ||
Wave number (cm−1) | 3392.56 | 3420.62 | -OH |
2955.39 | No peak | CH3; Antisymmetric stretching vibration | |
2927.16 | 2927.87 | CH2; Antisymmetric stretching vibration | |
No peak | 1733.46 | C = O | |
1318.63 | 1318.22 | CH2; Outside rocking vibration | |
No peak | 1258.81 | PO3; Antisymmetric stretching vibration | |
890.84 | 882.21 |
| |
PVA-SA-conidia before Cd biosorption | PVA-SA-conidia after Cd biosorption | ||
Wave number (cm−1) | 3392.56 | 3420.62 | -OH |
2955.39 | No peak | CH3; Antisymmetric stretching vibration | |
2927.16 | 2926.50 | CH2; Antisymmetric stretching vibration | |
No peak | 1733.07 | C = O | |
1318.63 | No peak | CH2; Outside rocking vibration | |
1289.89 | No peak | PO3; Antisymmetric stretching vibration | |
No peak | 1254.41 |
| |
948.45 | No peak |
| |
; Outside bending vibration
; Outside bending vibration
; Outside bending vibration
-PO4; Symmetric stretching vibration