Factors affecting the distribution of potentially toxic elements in surface soils around an industrialized area of northwestern Greece |
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Authors: | Alexandra Petrotou Konstantinos Skordas Georgios Papastergios and Anestis Filippidis |
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Institution: | (1) Department of Earth Sciences, Royal Holloway University of London, Egham Hill, Egham, TW20 0EX, UK;(2) Present address: Frixou 2, 41222 Larissa, Greece;(3) Department of Ichthyology and Aquatic Environment, University of Thessaly, Fitokou str., N. Ionia, 38446 Volos, Greece;(4) Department of Mineralogy-Petrology-Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece |
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Abstract: | In order to investigate the factors influencing the distribution of 32 potentially toxic elements in the Ptolemais–Kozani
basin, northwestern Greece, 38 soil samples were collected and analyzed. Concentrations of Al, Ca, Fe, K, Mg, Mn, Na, P, Ti,
Ba, Co, Cr, Cu, La, Li, Ni, Pb, Sc, Sr, V, Y, and Zn were determined by ICP-AES and concentrations of As, Bi, Cd, Cs, Mo,
Rb, Sb, Th, Tl, and U by ICP-MS. Bivariate analysis, principal component analysis, and geostatistical analysis were employed
to investigate the factors influencing the distribution of the elements determined in the study area. The results indicate
that the distribution of the majority of elements determined, especially for Cr, Ni, and associated elements, is greatly influenced
by the geology and geomorphology of the study area. Principal component analysis has yielded four factors that explain over
77% of the total variance in the data. These factors are as follows: lithophilic elements that are associated with Al silicates
minerals of K (factor I: 29.4%), ultramafic rocks (factor II: 20.5%), elements that are coprecipitated with Fe and Mn oxides
(factor III: 18.0%), and anthropogenic activities (factor IV: 9.3%). The anthropogenic activities that influence the distribution
of several potentially toxic elements (i.e., Cd, Cu, Pb, Zn) are agricultural practices and the deposition of fly ash in the
vicinity of the local power stations. |
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