Removal of Cd (II) from Aqueous Media by Adsorption onto Chemically and Thermally Treated Rice Husk

Table 3

C/O and C/Si ratios obtained by EDX analysis for all adsorbent materials.

Material	Ratio
	C/O	C/Si
RHw	1.8	4.5
RHc	1.5	18.9
RHc300	1.1	1.2
RHc500	0.5	0.6
RHc700	0.3	0.4