Table
1: Experimental design with the number of samples and replicates at each
level of ozone, dose, time of ozonation, rate of ozonation, and temperature.
Temperature (ºC) |
Level of ozonation |
Dose (g O3 kg-1) |
Time (min) |
Rate (g O3 kg-1
min-1) |
Samplesa × replicates |
5 (ºC) |
Low |
0.6 |
5 |
0.12 |
5 × 2 |
0.8 |
5 |
0.16 |
5 × 2 |
||
1 |
5 |
0.2 |
5 × 2 |
||
Medium |
1.4 |
7.5 |
0.19 |
5 × 2 |
|
1.9 |
7.5 |
0.25 |
5 × 2 |
||
2.1 |
10 |
0.21 |
5 × 2 |
||
High |
2.5 |
13 |
0.19 |
5 × 2 |
|
2.5 |
13 |
0.19 |
5 × 2 |
||
3 |
15 |
0.2 |
5 × 2 |
||
3.2 |
15 |
0.21 |
5 × 2 |
||
21 (ºC) |
Low |
0.4 |
1 |
0.4 |
5 × 2 |
0.4 |
1.5 |
0.27 |
5 × 2 |
||
0.6 |
2 |
0.3 |
5 × 2 |
||
0.7 |
2 |
0.35 |
5 × 2 |
||
Medium |
1.1 |
4 |
0.28 |
5 × 2 |
|
1.1 |
5 |
0.22 |
5 × 2 |
||
1.5 |
7.5 |
0.2 |
5 × 2 |
||
1.5 |
7.5 |
0.2 |
5 × 2 |
||
High |
2.2 |
10 |
0.22 |
5 × 2 |
|
3.5 |
15 |
0.23 |
5 × 2 |
aEach experiment consisted of five
samples (100 g soil each): three ozonated and two controls. The experiment was
repeated twice.