Table 2 Parameters and levels selected in research.
From: Evaluating the efficiency of formaldehyde degradation from aqueous environment by sonozone technique
Effective variables | Units | Levels | ||
|---|---|---|---|---|
1 | 2 | 3 | ||
Electrical power | W | 50 | 100 | 150 |
Ozone concentration | mg/min L | 0.2 | 0.4 | 0.6 |
Formaldehyde concentration | mg/L | 110 | 220 | 330 |
time | min | 8 | 16 | 32 |
pH | – | 3 | 7 | 11 |
