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Extraction Of Silica From Rice Husk Via Acid Leaching Treatment

Table 3:

Citric acid content Stirring time(min) SiO2 (wt %) Fe2O3 (wt %)
Rice husk (untreated) - 82.8 0.510
0.1M 30 94.7 0.410
0.1M 60 95.8 0.570
0.1M 90 95.6 0.600
0.5M 30 98.7 0.276
0.5M 60 98.6 0.130
0.5M 90 98.3 0.190
1.0 M 30 98.6 0.130
1.0 M 60 99.3 0.240
1.0 M 90 98.6 0.260
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