Adsorption of Cd (II) Using Chemically Modified Rice Husk: Characterization, Equilibrium, and Kinetic Studies

Table 1

Main functional groups present in untreated rice husk sample.

Wave number (cm^-1)	Vibration mode	Intensity	Functional group	Functional group name
3328.26	Tension	Medium	O-H	Hidroxyl
2929.64	Tension	Low	C-H	Saturated
1716.56	Tension	Low	C=O	Carbonyl
1604.28	Tension	Low	C=C	Unsaturated
1033.74	Tension	Strong	C-O	Carboxilyc/alcohol
1033.74	Tension	Strong	Si-O	Siloxane