Removal of Pb (II) from Synthetic Solution and Paint Industry Wastewater Using Activated Carbon Derived from African Arrowroot (Canna indica) Stem

Table 3

FTIR spectral characteristics of CISAC before and after Pb (II) ion adsorption.

FTIR peak	Assigned functional groups	Band wave number (cm^−1)
		Before	After	Shift differences
1	Hydroxyl (O-H)	3450	3394	56
2	Methyl and methylene (C-H)	2374	2368	6
3	Methyl and methylene (C-H)	2291	2291	0
4	Acetyl (C=O)	1620	1606	14
5	Carbonyl (CC )	1383	1320	63
6	Nitrate (NO2)	1313	1236	77
7	Aryl (C-O)	1166	1152	14
8	Aryl (C-O)	1040	398	642