Adsorption Phenomenon of Arundinaria alpina Stem-Based Activated Carbon for the Removal of Lead from Aqueous Solution

Table 2

FTIR spectral characteristics of AASAC1 before and after adsorption.

Wavenumber (cm^−1)		Assignment
Before	After
3454	3384	O-H stretching in a hydrogen bond
1612	1630	C=C alkane, C=O
1315	1516	C-C=C asymmetric stretch, N=O stretch, N=O bend
1167	1210	C=O stretch, C-O alcoholic stretch, carboxylic acid, anhydrides
782	503	Aromatic (out-of-plane band)