Table 2 Central composite matrix of real values along with experimental and predicted values for oil adsorption (%) of HC oil using native Ch adsorbent.
From: Removal of oil spills by novel developed amphiphilic chitosan-g-citronellal schiff base polymer
Trial | Time (min) (X1) | Amount of oil (g) (X2) | Temp. (°C) (X3) | Oil adsorption (%) of native chitosan (Ch) | |
|---|---|---|---|---|---|
Measured | Predicted | ||||
1 | 0 (120) |  − 1 (0.5) |  − 1 (25) | 43.25 | 44.06 |
2 | 0 (120) | 1 (2.5) |  − 1 (25) | 32.88 | 31.87 |
3 | 0 (120) |  − 1 (0.5) | 1 (45) | 67.14 | 68.15 |
4 | 0 (120) | 1 (2.5) | 1 (45) | 57.44 | 56.63 |
5 |  − 1 (60) |  − 1 (0.5) | 0 (35) | 42.96 | 43.01 |
6 |  − 1 (60) | 1 (2.5) | 0 (35) | 30.21 | 32.08 |
7 | 1 (180) |  − 1 (0.5) | 0 (35) | 64.37 | 62.50 |
8 | 1 (180) | 1 (2.5) | 0 (35) | 49.78 | 49.73 |
9 |  − 1 (60) | 0 (1.5) |  − 1 (25) | 25.05 | 24.19 |
10 |  − 1 (60) | 0 (1.5) | 1 (45) | 48.14 | 47.08 |
11 | 1 (180) | 0 (1.5) |  − 1 (25) | 40.18 | 41.24 |
12 | 1 (180) | 0 (1.5) | 1 (45) | 66.33 | 67.19 |
13 | 0 (120) | 0 (1.5) | 0 (35) | 38.48 | 38.48 |
