Table 4 Full factorial experimental matrix for fluoride removal displayed in percentage
Experiment # | Dose (mg/100 L) | pH | Time | Actual % | Predicted % |
|---|---|---|---|---|---|
1 | 0.5 | 2 | 60 | 56.7 | 60.0 |
2 | 1 | 2 | 60 | 68.0 | 63.4 |
3 | 1.5 | 2 | 60 | 73.0 | 66.8 |
4 | 0.5 | 7 | 60 | 45.3 | 48.8 |
5 | 1 | 7 | 60 | 50.0 | 52.3 |
6 | 1.5 | 7 | 60 | 51.7 | 55.7 |
7 | 0.5 | 9 | 60 | 40.7 | 42.6 |
8 | 1 | 9 | 60 | 49.3 | 46.1 |
9 | 1.5 | 9 | 60 | 49.7 | 49.5 |
10 | 0.5 | 2 | 90 | 61.7 | 58.5 |
11 | 1 | 2 | 90 | 65.0 | 61.9 |
12 | 1.5 | 2 | 90 | 66.7 | 65.4 |
13 | 0.5 | 7 | 90 | 46.7 | 47.3 |
14 | 1 | 7 | 90 | 46.0 | 50.8 |
15 | 1.5 | 7 | 90 | 49.7 | 54.2 |
16 | 0.5 | 9 | 90 | 46.3 | 41.2 |
17 | 1 | 9 | 90 | 43.3 | 44.6 |
18 | 1.5 | 9 | 90 | 49.0 | 48.0 |
19 | 0.5 | 2 | 120 | 57.0 | 57.0 |
20 | 1 | 2 | 120 | 64.0 | 60.5 |
21 | 1.5 | 2 | 120 | 63.0 | 63.9 |
22 | 0.5 | 7 | 120 | 43.7 | 45.6 |
23 | 1 | 7 | 120 | 47.0 | 49.3 |
24 | 1.5 | 7 | 120 | 50.0 | 52.7 |
25 | 0.5 | 9 | 120 | 40.3 | 39.7 |
26 | 1 | 9 | 120 | 45.7 | 43.1 |
27 | 1.5 | 9 | 120 | 49.7 | 46.5 |