Table 2.

Process parameters for production of biogenic ZnO NP as per Box-Behnken design.

Run	Temp (°C)	pH	Time (min)	Conc of Zinc nitrate (mM)	Vol of Extract (mL)	Absorbance
1	25	8	90	50	25	0.742
2	40	6	90	30	10	0.698
3	10	6	180	30	25	0.778
4	40	6	90	50	25	0.784
5	25	4	0	30	25	0.008
6	25	8	180	30	25	0.756
7	25	4	90	30	40	0.638
8	10	8	90	30	25	0.612
9	10	6	90	50	25	0.743
10	40	6	90	30	40	0.796
11	40	6	180	30	25	0.843
12	25	8	0	30	25	0.01
13	25	4	90	50	25	0.789
14	25	8	90	30	40	0.824
15	40	4	90	30	25	0.756
16	25	6	90	30	25	0.425
17	25	6	0	30	10	0.009
18	25	6	0	50	25	0.012
19	25	6	180	50	25	0.921
20	40	8	90	30	25	0.655
21	25	6	90	10	10	0.512
22	25	6	90	30	25	0.768
23	10	6	90	30	10	0.626
24	10	4	90	30	25	0.678
25	25	6	90	50	10	0.684
26	10	6	90	10	25	0.712
27	25	6	180	10	25	0.801
28	25	4	180	30	25	0.814
29	10	6	90	30	40	0.842
30	25	6	0	10	25	0.012
31	10	6	0	30	25	0.014
32	40	6	90	10	25	0.234
33	25	6	90	50	40	0.744
34	25	4	90	10	25	0.521
35	25	6	90	30	25	0.667
36	25	4	90	30	10	0.7
37	25	6	90	10	40	0.734
38	25	6	90	30	25	0.746
39	25	6	90	30	25	0.742
40	25	8	90	30	10	0.745
41	25	6	0	30	40	0.012
42	25	6	180	30	40	0.845
43	25	6	180	30	10	0.848
44	40	6	0	30	25	0.018
45	25	8	90	10	25	0.661
46	25	6	90	30	25	0.621