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Table 9 Comparison of the concentrations of elements in the studied area with the values from the region, Europe, and the world (Facchinelli et al., 2001 ; Franco-Uria et al., 2009 )

From: Risk assessment of heavy metal soil pollution through principal components analysis and false color composition in Hamadan Province, Iran

  Europe mean Area mean World median Area median
As 11.6 15.79 5 12.5
Cu 17.3 36.2 25 35.5
Fe 2.17 2.94 4 4
Cd 0.284 0.15 0.3 0.11
Zn 60.9 80.03 70 76
Cr 94.8 96.81 80 94
Co 8.91 18.95 10 19
Pb 32.6 25.66 17 24
Ni 37.3 69.03 50 68
V 68.1 109.41 90 110
Sb 1.04 2.9 0.5 2.5