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

Table 3

Doehlert’s experimental design and responses: : yield and : MB adsorption.

Experiment	Design of experiment		Operating condition		Experimental response
			Temperature (°C)	Time (min)	(%)	(mg/g)
1	1.0000	0.0000	1000.00	75	49.970	21.179
2	−1.0000	0.0000	400.00	75	86.054	5.786
3	0.5000	0.8660	850.00	114	50.608	22.052
4	−0.5000	−0.8660	550.00	36	83.710	3.057
5	0.5000	−0.8660	850.00	36	60.860	23.690
6	−0.5000	0.8660	550.00	114	83.266	2.729
7	0.0000	0.0000	700.00	75	80.608	10.589
8	0.0000	0.0000	700.00	75	80.796	10.153
9	0.0000	0.0000	700.00	75	80.586	11.026
10	0.0000	0.0000	700.00	75	80.726	10.153