Adsorption of Phenol from Aqueous Solution Using Lantana camara, Forest Waste: Kinetics, Isotherm, and Thermodynamic Studies

Table 4

The FTIR spectral analysis of adsorbent treated with HCl.

Peak	Frequency (cm^−1)		Difference	Assignment
	Before adsorption	After adsorption
1	3620	3610	−10	O–H stretching in phenol
2	1203	1218	−15	C–O group in alcohol
3	1689	1697	+8	C=O stretch of carboxylic acid
4	1558	1566	+8	C=C bond of aromatic ring