Supervisors info:
Αργυράκη Αριάδνη, Αναπληρώτρια Καθηγήτρια, Γεωλογίας Ε.Κ.Π.Α
Δασενάκης Εμμανουήλ, Καθηγητής, Χημείας, Ε.Κ.Π.Α
Μουστάκας Νικόλαος, Καθηγητής, Αξιοποίησης Φυσικών Πόρων και Γεωργικής Μηχανικής, Γ.Π.Α
Summary:
The mobility of heavy metals (Cu, Fe, Pb, Zn) in 25 soil samples from rural areas of Attiki (Marathon, Sessi, Parnitha and Hymettus) and Karditsa regions is compared to 30 soil samples from the metalliferous region of Skouries, Chalkidiki. The research design was such that soil samples of all areas are away from any anthropogenic activities, e.g. cultivated areas, residential and mining areas, so that the role of natural geochemical background on environmental availability of the metals could be examined.
The heavy metal mobility in soil is determined by using four single stage chemical extractions including 0.43 M CH3COOH, for the exchangeable phase determination, 0.05 M EDTA for the potentially phytoavailable phase determination, 0.43 M HNO3 for the reactive phase determination and Aqua Regia (HCl 11,6 M / HNO3 15,7 M 3:1) for the pseudototal phase determination.
The pseudototal concentration medians of Cu, Fe, Pb and Zn in the soil of metalliferous areas are higher than the respective medians in rural soil. The ratios of the extractable concentrations of Cu, Fe, Pb and Zn relative to the pseudototal content in the soil are also higher for the metalliferous soil category. Finally the mobilization of trace metals dοes not appear to have been significantly affected by other physicochemichal factors such as soil pH, carbonate content, organic matter or magnetic susceptibility.
Keywords:
Geochemical background, environmental availability, selective extraction, Attica, Karditsa, Skouries Chalkidiki
