Table 3 Results of the experimental runs based on the central composite design
Run | A:PH | B:Contact time (min) | C:Concentration of diazinon (mg/L) | D:Dosage of nanoparticles (mg/L) | Removal efficiency (%) | Predicted value |
|---|---|---|---|---|---|---|
1 | 7.500 | 65.00 | 20.50 | 550.0 | 88.90 | 89.26 |
2 | 7.500 | 65.00 | 20.50 | 550.0 | 88.68 | 89.26 |
3 | 7.500 | 65.00 | 20.50 | 550.0 | 87.99 | 89.26 |
4 | 7.500 | 65.00 | 20.50 | 550.0 | 88.39 | 89.26 |
5 | 7.500 | 65.00 | 20.50 | 550.0 | 90.91 | 89.26 |
6 | 7.500 | 65.00 | 20.50 | 550.0 | 90.70 | 89.26 |
7 | 5.250 | 37.50 | 10.75 | 325.0 | 83.60 | 83.67 |
8 | 9.750 | 37.50 | 10.75 | 325.0 | 77.24 | 76.92 |
9 | 5.250 | 92.50 | 10.75 | 325.0 | 84.10 | 85.02 |
10 | 9.750 | 92.50 | 10.75 | 325.0 | 77.33 | 77.19 |
11 | 5.250 | 37.50 | 30.25 | 325.0 | 76.30 | 76.86 |
12 | 9.750 | 37.50 | 30.25 | 325.0 | 70.10 | 69.36 |
13 | 5.250 | 92.50 | 30.25 | 325.0 | 81.17 | 79.52 |
14 | 9.750 | 92.50 | 30.25 | 325.0 | 71.23 | 70.93 |
15 | 5.250 | 37.50 | 10.75 | 775.0 | 90.00 | 90.52 |
16 | 9.750 | 37.50 | 10.75 | 775.0 | 84.00 | 84.99 |
17 | 5.250 | 92.50 | 10.75 | 775.0 | 90.20 | 90.28 |
18 | 9.750 | 92.50 | 10.75 | 775.0 | 84.00 | 83.66 |
19 | 5.250 | 37.50 | 30.25 | 775.0 | 83.00 | 82.47 |
20 | 9.750 | 37.50 | 30.25 | 775.0 | 76.90 | 76.20 |
21 | 5.250 | 92.50 | 30.25 | 775.0 | 83.00 | 83.54 |
22 | 9.750 | 92.50 | 30.25 | 775.0 | 76.91 | 76.18 |
23 | 3.000 | 65.00 | 20.50 | 550.0 | 78.81 | 78.33 |
24 | 12.00 | 65.00 | 20.50 | 550.0 | 63.30 | 64.22 |
25 | 7.500 | 10.00 | 20.50 | 550.0 | 78.39 | 78.25 |
26 | 7.500 | 65.00 | 20.50 | 550.0 | 79.00 | 79.59 |
27 | 7.500 | 65.00 | 1.000 | 550.0 | 96.06 | 94.95 |
28 | 7.500 | 65.00 | 40.00 | 550.0 | 79.10 | 80.66 |
29 | 7.500 | 65.00 | 20.50 | 100.0 | 77.20 | 77.78 |
30 | 7.500 | 65.00 | 20.50 | 1000 | 90.00 | 89.87 |