Table 2 Changes of IR peaks before and after metal biosorption, and functional groups for metal adsorption.

From: A novel approach of utilization of the fungal conidia biomass to remove heavy metals from the aqueous solution through immobilization

 

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

; Outside bending vibration

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

; Outside bending vibration

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

; Outside bending vibration

948.45

No peak

-PO4; Symmetric stretching vibration