Table 4 Optimization results derived by CCD for silica yield.

From: Application of response surface methodology (RSM) for experimental optimization in biogenic silica extraction from rice husk and straw ash

Optimum variables

Silica yield (wt.%)

Solution no

A (M)

B (°C)

C (hrs.)

Experimental value

Predicted value

Desirability

1

2.07

95.42

2.78

97.35

97.40

1

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