Material transport between the atmosphere and sediment of the Lake Balaton

Seasonal changes of the concentration of PAHs in aerosol was observed, samples collected at winter contained the highest values. In December-January 2002/2003, the wet deposition was found as 64 μg/m2 period. Among the individual compounds, the wet deposition rate of phenantrane, fluoranthene and pyrene was dominant, while for dry deposition, these compounds were fluoranthene and pyrene. The concentrations of ∑PAHs found for all sites and depth of sediment samples ranged from 11 to 1734 μg/kg dry weight with an average of 132 μg/kg. These values represent a quite low pollution level compared to other sediment with anthropogenic influence. Based on the results, it can be definitely confirmed that the chemical quality of the water and sediment of the Lake Balaton is satisfactory.