Adsorptive Removal of Methylene Blue and Crystal Violet onto Micro-Mesoporous Zr₃O/Activated Carbon Composite: A Joint Experimental and Statistical Modeling Considerations

Table 7

Analysis of the variance-reduced model.

Source	Coefficient	t exp	P value
MB adsorption onto Zr3O/AC
	99.498	7498	<0.0001
	0.379	32.96	<0.0001
	−0.084	−7.29	0.0007
	0.112	9.79	0.00018
	−0.304	−19.55	<0.0001
	0.006	0.37	0.723
	0.013	0.86	0.431
	0.145	8.92	0.000295
	−0.037	−2.31	0.069
	−0.008	−0.46	0.664
CV adsorption onto Zr3O/AC
	92.253	2819	<0.0001
	5.299	186.95	<0.0001
	−0.686	−24.21	<0.0001
	−0.177	−4.15	0.0089
	−3.287	−85.64	<0.0001
	3.058	79.69	<0.0001
	2.956	77.02	<0.0001
	0.555	13.85	<0.0001
	−0.088	−2.18	0.081
	−0.003	−0.06	0.953