Optimization of Preparation Conditions of Novel Adsorbent from Sugar Scum Using Response Surface Methodology for Removal of Methylene Blue

Table 2

Doehlert’s experimental design and operating conditions.

Experiment	Design of experiment		Operating condition
			Temperature (°C)	Time (min)
1	1.0000	0.0000	1000.00	75
2	−1.0000	0.0000	400.00	75
3	0.5000	0.8660	850.00	114
4	−0.5000	−0.8660	550.00	36
5	0.5000	−0.8660	850.00	36
6	−0.5000	0.8660	550.00	114
7	0.0000	0.0000	700.00	75
8	0.0000	0.0000	700.00	75
9	0.0000	0.0000	700.00	75
10	0.0000	0.0000	700.00	75