Formy biodostępne Cd, Cu, Pb, Zn w osadach den dolin zachodniej części Wyżyny Lubelskiej

This study was concerned with the content of bio-available forms of Cd, Cu, Pb and Zn in samples collected from the valley bottoms in the western part of the Lublin Upland Analysis was carried out for 55 samples of sediments located at sites with various degrees of anthropogenic pressure The highest percentage of bio-available forms was found in flood plains located in urban and industrial areas This pattern was mostly pronounced in the case of bio-available zinc: its content in the sediments in industrial areas was 5 to 6 times higher than in the other types of profiles For copper, this indicator reached a maximum of 45%, for cadmium 30% The absolute bio-available form content showed a high correlation with the total content, particularly for copper There was also a significant correlation with organic matter content, sand fraction content (Zn) and clay fraction content (Pb and Zn) The accumulation of the bio-available forms of heavy metals (Cd, Cu, Pb and Zn) in the sediments under study is a result of many factors The study findings indicate, however, a correlation between the content of bioavailable forms and the intensity of geochemical pressure - the highest percentage of these forms was found in urban and industrial areas Geomorphic location of the profile was also an important factor