Synthesis of Poly(AN-co-VP)/Zeolite Composite and Its Application for the Removal of Brilliant Green by Adsorption Process: Kinetics, Isotherms, and Experimental Design

Table 7

Experimental parameters and levels in the CCD for the BG removal.

Factors	Units		Levels
			- α(1.68)	Low (-1)	Central (0)	High (+1)	+α(1.68)
A: Adsorbent mass	g/50 mL		0.05	0.091	0.15	0.21	0.25
B: BG concentration	mg/L		25	40.20	62.50	84.80	100
C: Time	min		10	38.38	80	121.62	150
	Factors				Response (BG removal, %)
Run	A	B	C		Observed	Predicted	Residual
1	1.682	0	0		91.94	90.04	1.90
2	-1	-1	-1		80.21	76.26	3.95
3	1	-1	1		99.68	100.00	-0.32
4	0	0	0		80.91	80.92	-0.01
5	-1	1	1		71.30	65.02	6.28
6	0	0	-1.682		77.16	80.33	-3.17
7	0	0	0		80.91	80.92	-0.01
8	-1.682	0	0		41.31	48.54	-7.23
9	0	0	0		80.72	80.92	-0.20
10	1	1	1		93.83	94.01	-0.18
11	0	0	0		82.07	80.92	1.15
12	1	-1	-1		94.12	96.63	-2.51
13	0	0	0		80.91	80.92	-0.01
14	0	0	1.682		93.21	95.37	-2.16
15	-1	1	-1		54.61	50.52	4.09
16	-1	-1	1		83.84	82.93	0.91
17	0	-1.682	0		99.87	99.25	0.62
18	0	1.682	0		66.62	72.56	-5.94
19	0	0	0		80.91	80.92	-0.01
20	1	1	-1		85.66	82.80	2.86