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Orthogonal experimental results.
| Serial number | pH | T (°C) | Stirring speed (r/min) | Blank | Adsorption/% |
|---|---|---|---|---|---|
| 1 | 5 | 25 | 600 | 1 | 23.8 |
| 2 | 5 | 35 | 800 | 2 | 27.0 |
| 3 | 5 | 45 | 1000 | 3 | 24.2 |
| 4 | 7 | 25 | 800 | 3 | 25.8 |
| 5 | 7 | 35 | 1000 | 1 | 25.2 |
| 6 | 7 | 45 | 600 | 2 | 22.2 |
| 7 | 9 | 25 | 1000 | 2 | 18.2 |
| 8 | 9 | 35 | 600 | 3 | 17.4 |
| 9 | 9 | 45 | 800 | 1 | 19.2 |
| K1 | 25.0 | 22.6 | 21.1 | 22.7 | |
| K2 | 24.4 | 23.2 | 24.0 | 22.5 | |
| K3 | 18.3 | 21.9 | 22.5 | 22.5 | |
| R | 6.7 | 1.3 | 2.9 | 0.3 |
