Fabrication of Electrospun Polyamide-6/Chitosan Nanofibrous Membrane toward Anionic Dyes Removal

Table 3

Full factorial central composite design for removal of Solophenyl Red 3BL and Polar Yellow GN.

Run no.	Solution PH (A)	Initial dye concentration (B)	Electrospinning time (C)	Chitosan ratio (D)	(%) removal (Solophenyl Red 3BL)		(%) removal (Polar Yellow GN)
					Exp.	Predicted	Exp.	Predicted
1	5	50	2	10	68	69.67	72	70.83
2	9	50	2	10	61	61.5	56	54.83
3	5	100	2	10	71	69.33	79	80.08
4	9	100	2	10	64	61.16	61	64.08
5	5	50	4	10	75	79.33	83	85.75
6	9	50	4	10	68	71.17	69	69.75
7	5	100	4	10	76	78.99	97	95
8	9	100	4	10	67	70.83	78	79
9	5	50	2	30	83	86.67	84	84.5
10	9	50	2	30	58	57.49	61	59.5
11	5	100	2	30	88	86.33	86	85.25
12	9	100	2	30	59	57.17	62	60.25
13	5	50	4	30	97	96.33	95	93.91
14	9	50	4	30	69	67.17	71	68.92
15	5	100	4	30	98	95.99	98	94.67
16	9	100	4	30	66	66.83	66	69.67
17	3	75	3	20	92	89.83	97	98.75
18	11	75	3	20	52	52.5	59	57.75
19	7	25	3	20	85	80.83	64	65.25
20	7	125	3	20	78	80.17	76	75.25
21	7	75	1	20	57	61.5	64	64.58
22	7	75	5	20	83	80.83	89	88.92
23	7	75	3	0	74	64.67	79	76.58
24	7	75	3	40	79	77.67	78	80.92
25	7	75	3	20	72	77.67	64	66
26	7	75	3	20	69	77.67	68	66
27	7	75	3	20	73	77.67	66	66
28	7	75	3	20	71	77.67	65	66
29	7	75	3	20	70	77.67	67	66
30	7	75	3	20	68	77.67	66	66