Table 2. CCD Experimental Matrix and Experimental Results for This Study.

run	n(glu)/n(V)	concentration of H2SO4	reaction time/min	reaction temperature/°C	adsorption efficiency/%
1	1.5	10	35	30	3.61
2	1.5	20	10	30	63.88
3	1.5	20	60	30	5.42
4	3.0	20	35	30	10.90
5	0.0	20	35	30	4.55
6	1.5	30	35	30	5.29
7	0.0	10	35	60	27.05
8	1.5	10	10	60	73.40
9	1.5	10	60	60	35.57
10	3.0	10	35	60	66.59
11	1.5	20	35	60	22.70
12	3.0	20	60	60	42.73
13	3.0	20	10	60	27.14
14	1.5	20	35	60	36.75
15	1.5	20	35	60	36.75
16	0.0	20	10	60	20.31
17	1.5	20	35	60	36.75
18	0.0	20	60	60	9.36
19	1.5	20	35	60	36.75
20	1.5	30	60	60	5.42
21	1.5	30	10	60	13.48
22	0.0	30	35	60	6.30
23	3.0	30	35	60	7.17
24	1.5	10	35	90	90.72
25	1.5	20	60	90	76.79
26	0.0	20	35	90	61.82
27	3.0	20	35	90	81.61
28	1.5	20	10	90	70.12
29	1.5	30	35	90	57.44