Chemical Modifications of Cassava Peel as Adsorbent Material for Metals Ions from Wastewater

Table 4

Mean square and summary of analysis of variance (ANOVA) are displayed to forecast model for the influence of the masses of cassava and pH solution on the removal of Cd(II), Pb(II), and Cr(III) to the adsorbents in natura and modified.

FV	GL	Cd(II)				Pb(II)				Cr(III)
		M. in natura	M. H2O2	M. H2SO4	M. NaOH	M. in natura	M. H2O2	M. H2SO4	M. NaOH	M. in natura	M. H2O2	M. H2SO4	M. NaOH
Mass (L)	1	1.621	1.516	1.401	1.827	1.685	1.633	1.492	1.635	1.430	1.483	1.549	1.287
Mass (Q)	1	0.335	0.322	0.287	0.382	0.356	0.348	0.332	0.350	0.302	0.310	0.319	0.267
pH (L)	1	0.000	0.001	0.001	0.000	0.000	0.000	0.000	0.000	0.027	0.021	0.015	0.030
pH (Q)	1	0.001	0.002	0.002	0.002	0.001	0.002	0.002	0.001	0.006	0.006	0.008	0.000
Mass × pH	1	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.000	0.007	0.003	0.002	0.004
Total	6	0.009	0.006	0.008	0.011	0.009	0.008	0.009	0.008	0.011	0.010	0.007	0.003
Residue	11

Significant at 1%.