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Table 1 Chemical characteristics (median and range values) of soils samples collected from the three cities

From: Bacterial community and chemical profiles of oil-polluted sites in selected cities of Uganda: potential for developing a bacterial-based product for remediation of oil-polluted sites

Parameter

Site

Kampala city

Jinja city

Hoima city

Study ranges

Oil-polluted soil

Control

Oil-polluted soil

Control

Oil-polluted soil

Control

Oil-polluted soil

Control

pH

Garage

6.9

6.3

6.7

6.7

6.5

6.8

6.1-7.9

6.1-7.1

 

Industry

7.9

6.3

7.0

6.7

6.7

6.8

5.3-7.3

6.1-7.1

Organic content (%)

Garage

25.5

4.50

26.9

4.20

20.3

3.50

14.0-43.8

1.6-6.0

 

Industry

23.1

4.50

19.3

4.20

20.9

3.50

5.7-36.0

1.6-6.0

Nitrogen (%)

Garage

0.34

0.28

0.27

0.19

0.49

0.19

0.13 − 0.70

0.03 − 0.35

 

Industry

0.22

0.28

0.32

0.19

0.34

0.19

0.08 − 0.60

0.03 − 0.35

Phosphorus (%)

Garage

0.27

0.24

0.17

0.07

0.08

0.06

0.06-0.88

0.01-0.33

 

Industry

0.13

0.24

0.28

0.07

0.12

0.06

0.05-0.98

0.01-0.33

Zinc (mg/kg)

Garage

46.7

17.1

46.2

31.7

35.9

3.2

27.4-49.7

2.5-42.2

 

Industry

24.8

17.1

36.9

31.7

37.4

3.2

6.4-48.6

2.5-42.2

Chromium (mg/kg)

Garage

19.1

9.6

17.8

17.3

16.5

8.5

7.5-30.4

4.6-25.5

 

Industry

12.8

9.6

13.0

17.3

15.3

8.5

9.0-29.6

4.6-25.5

Manganese (mg/kg)

Garage

18.3

14.6

22.1

30.6

11.6

6.1

7.5-32.6

0.2-58.5

 

Industry

9.8

14.6

25.5

30.6

13.7

6.1

5.0-50.3

0.2-58.5

Nickel (mg/kg)

Garage

0.42

0.43

0.75

1.57

0.37

0.14

0.12-2.25

0.03-3.3

 

Industry

0.26

0.43

0.57

1.57

0.31

0.14

0.13-2.01

0.03-3.3

Lead (mg/kg)

Garage

1.51

0.31

2.01

1.99

0.19

0.07

0.06-3.99

0.04-4.01

 

Industry

0.39

0.31

0.27

1.99

0.26

0.07

0.05-3.38

0.04-4.01