Table 5 BB factorial design of Ni(II) percent removal (%) optimization using PFTAC.
From: Sustainable activated carbon from palm waste for aqueous nickel II adsorption
Coded values response (%) | ||||||||
|---|---|---|---|---|---|---|---|---|
Trial | X1 | X2 | X3 | Time (min) | Concentration (ppm) | Temperature(ºc) | Ni(II)percent removal (%) using PFTAC | |
Measured | Predicted | |||||||
1 | 0 | −1 | 1 | 30 | 50 | 45 | 64.57 | 58.8894 |
2 | 0 | 0 | 0 | 30 | 150 | 35 | 54.02 | 52.9254 |
3 | 1 | 0 | 1 | 90 | 150 | 45 | 82.92 | 83.0134 |
4 | 0 | 0 | 0 | 30 | 150 | 35 | 54.02 | 52.9254 |
5 | 1 | −1 | 0 | 90 | 50 | 35 | 98.43 | 100.6894 |
6 | 0 | −1 | −1 | 30 | 50 | 25 | 44.42 | 47.4814 |
7 | 1 | 0 | −1 | 90 | 150 | 25 | 82.25 | 77.5654 |
8 | −1 | 1 | 0 | 0 | 300 | 35 | 0 | 0 |
9 | 0 | 0 | 0 | 30 | 150 | 35 | 54.02 | 52.9254 |
10 | −1 | −1 | 0 | 0 | 50 | 35 | 0 | 0 |
11 | 1 | 1 | 0 | 90 | 300 | 35 | 46.65 | 42.6144 |
12 | 0 | 1 | −1 | 30 | 300 | 25 | 27.89 | 27.9064 |
13 | 0 | 1 | 1 | 30 | 300 | 45 | 37.19 | 31.3144 |
14 | −1 | 0 | 1 | 0 | 150 | 45 | 0 | 0 |
15 | −1 | 0 | −1 | 0 | 150 | 25 | 0 | 0 |
