Research Article

Cadmium Removal from Aqueous Systems Using Opuntia albicarpa L. Scheinvar as Biosorbent

Table 2

Functional groups present in treated Opuntia albicarpa L. Scheinvar and their corresponding infrared absorption frequencies.

Frequency (cm−1) Assignment

3600N–H amines groups
3428Hydroxyl group
2850C–H stretching
1623C=O stretching of COOH
1414Symmetric bending of CH3
1317C–N groups
1050C–O groups