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 |