The broad and intense absorption peak at 3440 cm1 indicates the presence of free or hydrogen bonded O–H groups (alcohols, phenols, and carboxylic acids) as in pectin, cellulose and lignin on the surface of the biosorbent [14].
The broad and intense absorption peak at 3440 cm1 indicates the presence of free or hydrogen bonded O–Hgroups (alcohols, phenols, and carboxylic acids) as in pectin, cellulose and lignin on the surface of the biosorbent [14].