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 (C)

Level of ozonation

Dose (g O3 kg-1)

Time (min)

Rate (g O3 kg-1 min-1)

Samplesa replicates

5 (C)

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 (C)

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.