Abstract
This study represents the first systematic investigation of the spatial distribution of different chemical elements in the soil of the city of Skopje, Republic of Macedonia. For this purpose, surface soil samples from 234 locations were analyzed to determine the content of 20 major and trace elements (Ag, Al, As, Ba, Ca, Cd, Cr, Cu, Fe, K, Li, Mg, Mn, Na, Ni, P, Pb, Sr, V and Zn) to assess the size of the areas eventually affected by heavy metal pollution. All samples were analyzed by atomic emission spectroscopy with inductively coupled plasma (ICP-AES). Cluster and factor analysis (R-mode) were applied in order to show the associations of chemical elements. Four factors were obtained: Factor 1 (K, Na, Ba and Al), Factor 2 (Cr, Ni, Mg and Fe), Factor 3 (Zn, Cd and Cu) and Factor 4 (Sr and Ca). It was established that the distribution of the associations of F1, F2 and F4 are mostly as a result of the complex geology and lithology of the region while the association of F3 represents an anthropogenic association.
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