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Table 1 Chemical compositions of the RHA analyzed by AAS

From: Synthesis of silica nanoparticles from Vietnamese rice husk by sol–gel method

Component (wt.%) K2O Al2O3 Fe2O3 CaO MgO Na2O SiO2
Before treatment 0.39 0.48 0.15 0.73 0.55 0.12 96.15
After treatment 0.01 0.06 0.04 0.04 0.06 0.01 99.08