Application of Response Surface Methodology to Enhance Phenol Removal from Refinery Wastewater by Microwave Process

Table 2

Design matrix for the phenol decomposition process by CCD.

Run number	𝐴	𝐵	𝐶	𝐷	𝐸	Phenol decomposition %
	MW power (Watt)	Time (min)	Salinity (mg/L)	pH	H2O2 (%)	Predicted	Experimental
1	600	10	1000	5	1	44.39	47.05
2	600	30	1000	9	1	36.25	38.90
3	600	10	1000	9	1	27.09	17.60
4	600	30	200	9	10	48.23	51.45
5	300	10	200	9	10	47.36	45.47
6	450	20	1000	7	5.5	54.69	68.49
7	600	10	200	5	10	50.17	55.13
8	300	10	1000	5	10	55.51	50.74
9	450	20	600	5	5.5	61.19	69.79
10	300	30	1000	5	1	49.65	59.44
11	600	10	1000	5	10	56.60	51.24
12	300	30	200	9	1	42.37	46.79
13	600	30	1000	5	1	57.86	56.43
14	300	10	200	9	1	31.50	42.70
15	450	20	600	7	5.5	56.97	52.65
16	600	30	1000	9	10	55.32	59.92
17	300	10	1000	9	1	24.02	27.21
18	600	10	200	5	1	50.47	57.31
19	450	20	600	7	5.5	56.97	57.76
20	300	30	200	5	10	65.84	66.90
21	450	20	600	7	5.5	56.97	51.08
22	600	30	200	5	10	63.17	65.84
23	450	20	600	7	10	68.50	67.44
24	300	30	200	5	1	59.87	59.12
25	600	20	600	7	5.5	50.04	55.97
26	450	20	600	7	1	55.22	63.61
27	300	10	200	5	1	44.68	30.39
28	600	30	1000	5	10	68.57	59.21
29	300	10	200	5	10	52.17	58.85
30	600	30	200	9	1	41.67	44.81
31	600	30	200	5	1	64.98	58.57
32	450	20	600	9	5.5	47.97	46.70
33	450	20	600	7	5.5	56.97	55.90
34	300	10	1000	5	1	35.51	32.43
35	300	20	600	7	5.5	49.84	51.24
36	300	10	1000	9	10	52.39	52.58
37	600	10	1000	9	10	47.68	55.38
38	450	20	600	7	5.5	56.97	53.91
39	600	10	200	9	10	39.55	30.50
40	450	20	600	7	5.5	56.97	48.94
41	450	10	600	7	5.5	49.44	57.21
42	300	30	1000	5	10	68.14	70.31
43	300	30	1000	9	1	33.85	20.30
44	450	30	600	7	5.5	60.85	60.42
45	300	30	1000	9	10	60.72	61.00
46	300	30	200	9	10	56.72	54.63
47	450	20	600	7	5.5	56.97	54.68
48	450	20	600	7	5.5	56.97	51.46
49	600	10	200	9	1	31.48	28.20
50	450	20	200	7	5.5	55.73	49.27