Table 1.
Summary statistics of heavy metal concentrations in soil
| Heavy metal | Mean | Median | Minimum | Maximum | SD | CV | Skewness | Mean CF | Dutch SQGV |
Canadian SQGV | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Optimal | Action | ||||||||||
| Ba | 627.7 | 574.0 | 120.6 | 2635 | 339.1 | 0.54 | 1.88 | 1.46 | 200 | 625 | 500 |
| Cd | 6.6 | 3.9 | 0.4 | 26.5 | 6.8 | 1.04 | 1.35 | 32.80 | 1 | 12 | 10 |
| Co | 46.6 | 35.3 | 8.8 | 153.7 | 29.2 | 0.63 | 1.12 | 1.86 | 20 | 240 | - |
| Cr | 296.6 | 197.3 | 21.1 | 1332 | 273.3 | 0.92 | 1.57 | 2.94 | 100 | 380 | 64 |
| Cu | 1387.9 | 290.7 | 9.4 | 18285 | 2507.2 | 1.81 | 3.70 | 23.11 | 36 | 190 | 63 |
| Hg | 2.7 | 1.4 | 0.4 | 13.4 | 2.9 | 1.07 | 2.03 | 32.61 | 0.3 | 10 | 7 |
| Ni | 61.7 | 13.9 | 0.6 | 4003 | 373.4 | 6.05 | 10.59 | 0.37 | 35 | 210 | 50 |
| Pb | 953.2 | 290.9 | 14.2 | 10280 | 1734.8 | 1.82 | 3.29 | 70.25 | 85 | 530 | 140 |
| Zn | 1371.1 | 576.6 | 41.9 | 12907.5 | 1923.8 | 1.40 | 3.07 | 17.85 | 140 | 720 | 200 |
Concentration values are measured in ppm.
SD, standard deviation; CV, coefficient of variation; CF, contamination factor; SQGV, soil quality and guidance values; Ba, barium; Cd, cadmium; Co, cobalt; Cr, chromium; Cu, copper; Hg, mercury; Ni, nickel; Pb, lead; Zn, zinc.