Szukana fraza: [Abstract = "Samples of the sediments were tested for Fe, Mn, As, Al and Cr content. The metals are present in the sediments but their content is mostly \(apart from Al\) beneath the geochemical background in the region. Among the elements only an elevated amount of aluminum was noticed. Its high content might be related to the process of chemical weathering of pyrite, taking place in the waste dumps."]