Table 3 Adsorption experiment runs and corresponding response removal efficiency.
Run | Factor 1 = pH; Factor 2 = adsorbent dose; Factor 3 = time; Factor 4 = pollutant concentration | Actual value | Predicted value | |||
|---|---|---|---|---|---|---|
A: pH | B: adsorbrent dose (g) | C: contact time (min) | D: initial dye conc. (mg/L) | (% removal) | (% removal) | |
1 | 3 | 0.5 | 90 | 50 | 86.78 | 86.70 |
2 | 6.5 | 0.5 | 60 | 75 | 46.92 | 47.37 |
3 | 10 | 1.5 | 90 | 100 | 36.14 | 37.07 |
4 | 6.5 | 1 | 30 | 75 | 51.62 | 53.07 |
5 | 10 | 1 | 60 | 75 | 43.61 | 46.82 |
6 | 10 | 1.5 | 90 | 50 | 59.33 | 59.08 |
7 | 3 | 1.5 | 90 | 100 | 60.06 | 58.11 |
8 | 10 | 1.5 | 30 | 50 | 52.14 | 51.73 |
9 | 3 | 0.5 | 90 | 100 | 40.71 | 42.85 |
10 | 3 | 1 | 60 | 75 | 79.69 | 77.37 |
11 | 10 | 0.5 | 90 | 50 | 47.05 | 46.63 |
12 | 3 | 1.5 | 30 | 50 | 89.27 | 88.67 |
13 | 6.5 | 1 | 60 | 75 | 59.21 | 59.23 |
14 | 10 | 0.5 | 30 | 100 | 19.27 | 19.46 |
15 | 10 | 1.5 | 30 | 100 | 34.83 | 32.95 |
16 | 6.5 | 1 | 60 | 75 | 62.26 | 59.23 |
17 | 6.5 | 1.5 | 60 | 75 | 58.34 | 58.79 |
18 | 6.5 | 1 | 60 | 50 | 78.03 | 77.44 |
19 | 10 | 0.5 | 30 | 50 | 44.17 | 44.16 |
20 | 6.5 | 1 | 60 | 100 | 44.63 | 46.12 |
21 | 3 | 0.5 | 30 | 100 | 45.29 | 43.58 |
22 | 6.5 | 1 | 90 | 75 | 56.94 | 56.38 |
23 | 6.5 | 1 | 60 | 75 | 59.21 | 59.23 |
24 | 3 | 0.5 | 30 | 50 | 83.39 | 84.20 |
25 | 6.5 | 1 | 60 | 75 | 59.21 | 59.23 |
26 | 10 | 0.5 | 90 | 100 | 20.06 | 18.70 |
27 | 3 | 1.5 | 30 | 100 | 51.82 | 53.97 |
28 | 6.5 | 1 | 60 | 75 | 60.17 | 59.23 |
29 | 3 | 1.5 | 90 | 50 | 94.5 | 96.05 |
30 | 6.5 | 1 | 60 | 75 | 57.99 | 59.23 |
