Preparation of Mesoporous-Activated Carbon from Branches of Pomegranate Trees: Optimization on Removal of Methylene Blue Using Response Surface Methodology

Table 1

ANOVA for response surface quadratic model for BPAC yield.

Source	Sum of squares	Degree of freedom	Mean square	𝐹 value	Prob > 𝐹
Model	16.08	9	1.79	13.5	0.0001
𝑋1	0.16	1	0.16	1.28	0.2839
𝑋2	0.84	1	0.84	6.66	0.0274
𝑋3	8.51	1	8.51	67.89	<0.0001
𝑋^21	0.24	1	0.24	1.90	0.1979
𝑋^22	4.13	1	4.13	32.93	0.0002
𝑋^23	2.88	1	2.88	22.95	0.0007
𝑋1𝑋2	0.080	1	0.080	0.64	0.4430
𝑋1𝑋3	0.080	1	0.080	0.64	0.4430
𝑋2𝑋3	0.000	1	0.000	0.000	1.0000