The application of Rumex abyssinicus based activated carbon for Brilliant Blue Reactive dye adsorption from aqueous solution

Table 7 ANOVA for quadratic model

Source	Sum of squares	df	Mean square	F-value	p-value	Significance
Model	4717.57	14	336.97	51.78	< 0.0001	**
A-pH	1157.45	1	1157.45	177.85	< 0.0001	**
B-Dye concentration	278.35	1	278.35	42.77	< 0.0001	**
C-Adsorbent dosage	1041.46	1	1041.46	160.03	< 0.0001	**
D-Contact time	61.81	1	61.81	9.50	0.0076	**
AB	221.38	1	221.38	34.02	< 0.0001	*
AC	0.0583	1	0.0583	0.0090	0.9258	*
AD	19.65	1	19.65	3.02	0.1028	**
BC	83.68	1	83.68	12.86	0.0027	**
BD	319.76	1	319.76	49.13	< 0.0001	*
CD	17.14	1	17.14	2.63	0.1254	*
A²	1300.05	1	1300.05	199.76	< 0.0001	**
B²	543.86	1	543.86	83.57	< 0.0001	**
C²	45.03	1	45.03	6.92	0.0189	**
D²	9.02	1	9.02	1.39	0.2576	*
Residual	97.62	15	6.51
Pure error	17.18	5	3.44
Cor total	4815.19	29
Lack of fit	97.62	13	7.51			*
C.V %	3.03

ISSN: 2661-801X