Metal-Organic Framework MIL-53(Fe) as an Adsorbent for Ibuprofen Drug Removal from Aqueous Solutions: Response Surface Modeling and Optimization

Table 3

Experimental design used for investigation of IBU removal over MIL-53(Fe).

N	Variables			IBU removal efficiency (%)
	x1	x2	x3	Observed	Predicted
1	5	0.5	4	69.8	64.3
2	15	0.5	4	43.8	38.5
3	5	1.5	4	80	73.7
4	15	1.5	4	78.7	75.1
5	5	0.5	8	35.8	32.1
6	15	0.5	8	10.7	9.8
7	5	1.5	8	26	24.1
8	15	1.5	8	30.8	29.0
9	1.6	1	6	37.5	44.4
10	18.4	1	6	23.5	26.9
11	10	0.16	6	20	25.6
12	10	1.84	6	45.1	49.7
13	10	1	2.6	77.1	85.9
14	10	1	10.4	18.6	20.0
15	10	1	6	22.6	21.6
16	10	1	6	17.7	21.6
17	10	1	6	23.8	21.6
18	10	1	6	25	21.6
19	10	1	6	20	21.6
20	10	1	6	22	21.6