| Abstract [eng] |
The aim of investigation was to determine distribution peculiarities of heavy metals in stadiums of Vilnius City. The 52 samples from the uppermost part (~10 cm depth) of soil were taken in year 2007. Ag, B, Ba, Co, Cr, Cu, Mn, Mo, Ni, Pb, Sn, V ir Zn contents were determined by optical atomic emission spectrophotometry. In addition, Cu, Pb and Zn were analyzed by XRF. The analyses were carried out at Institute of Geology & Geography. Two background level sets of the determined chemical elements were calculated for soils classified according grain-size analysis and geological data extracted from the Quaternary geological map of Vilnius. The obtained results revealed that Zn, Pb, Cu, Ag and Sn contaminate soils of some stadiums. The contamination of soils by Zn, Pb and Cu could be related to chemical pollution from motor vehicles. A domestic waste pollution may have influenced elevated quantities of Ag and Sn. The rest elements (Cr, V, Mn and B) are rather controlled by the mineral composition of soils. The contamination of soils by Mo, Ba, Ni and Co is not significant and risk to the environment and the people is minimal. The major threat to the environment arises from Pb, Zn, Sn and Ag contamination. The maximum allowable concentration (MAC) of the latter elements is exceeded in the five surveyed areas. However, the values of Pb, Zn and Cu determined by XRF are below MAC. Analytical uncertainties between the analytical methods used may be responsible for the latter fact. No linear relationship between grain-size and chemical elements variation was found. |
