Characterization of H_𝟑PO_𝟒-Treated Rice Husk Adsorbent and Adsorption of Copper(II) from Aqueous Solution

Table 2

Composition of rice husk by XRF analysis.

Element component	Native rice husk (wt.%)	H3PO4-treated rice husk (wt.%)
O	25.982	24.819
Na	0.019	0.025
Mg	0.06	0.018
Al	0.038	0.040
Si	15.367	17.927
P	0.065	0.349
S	0.130	0.098
Cl	0.234	0.050
K	1.209	—
Ca	0.399	0.148
Mn	0.039	0.018
Fe	0.014	0.026