Table 1 Controllable and noise factors of Taguchi method.
Level | |||||
|---|---|---|---|---|---|
Factor | Description | 1 | 2 | 3 | |
Controllable factors | A | Dose (g) | 0.5 | 1 | 5 |
B | Treatment time (h) | 2 | 4 | 6 | |
C | Concentration of modifier (%) | 0.5 | 1 | 2 | |
D | Particle diameter (mm) | 0.3 < d < 0.45 | 0.15 < d < 0.3 | d < 0.15 | |
Noise Factors | 1 | Concentration of adsorbate (mg/L) | 100 | 500 | |
2 | pH of the adsorbate | 2 | 5 | ||
3 | Temperature (°C) | 10 | 30 | ||
