Table 3. Experimental Design According to Two-Level PBD and Experimental and Predicted Values of Adsorption Efficiency (%) (Number of Numerical Factors: 5; Number of Categorical Factors: 2; and Number of Runs: 12).
| adsorption
efficiency |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
| run | pH | speed (rpm) | amount (mg) | temp. (°C) | time (min) | type | GA | experimental (%) | predicted (%) |
| 1 | 2 | 200 | 1000 | 25 | 20 | hydrogel | 30.12 | 33.09 | |
| 2 | 4 | 200 | 1000 | 25 | 2 | cryogel | 45.09 | 40.42 | |
| 3 | 2 | 100 | 1000 | 25 | 20 | hydrogel | + | 22.40 | 23.79 |
| 4 | 2 | 200 | 1000 | 45 | 2 | cryogel | + | 98.23 | 93.24 |
| 5 | 4 | 100 | 1000 | 45 | 20 | cryogel | + | 8.43 | 4.70 |
| 6 | 4 | 100 | 1000 | 45 | 2 | hydrogel | 44.18 | 48.85 | |
| 7 | 2 | 100 | 100 | 45 | 2 | hydrogel | 52.70 | 51.31 | |
| 8 | 4 | 200 | 100 | 45 | 20 | hydrogel | + | 18.21 | 21.62 |
| 9 | 2 | 100 | 100 | 25 | 2 | cryogel | + | 64.15 | 67.88 |
| 10 | 4 | 100 | 100 | 25 | 20 | cryogel | 51.30 | 54.26 | |
| 11 | 4 | 200 | 100 | 25 | 2 | hydrogel | + | 5.19 | 2.54 |
| 12 | 2 | 200 | 100 | 45 | 20 | cryogel | 59.00 | 57.29 | |