Optimization of Activated Carbons Prepared by H₃PO₄ and Steam Activation of Oil Palm Shells

Table 5

Analysis of variance of iodine adsorption, I₂/AC-H₃PO₄ (𝑌₂).

Source of variation	Sum of square	Degree of freedom	Square mean	Rapport	Signif.
Regression	7.599𝐸+0004	5	1.519𝐸+0004	176.7482	<0.01***
Residual	5.159𝐸+0002	6	8.598𝐸+0001
Total	7.650𝐸+0004	11

*** most significant effect, ** less significant effect, * not significant effect.