TRACE ELEMENTS IN BYDGOSZCZ CANAL SEDIMENTS

Summary. In the sediment samples taken from the Bydgoszcz Canal the content of As, Ba, Cr, Hg, Pb, Co, Cu, Ni, Sn and Zn were determined by ICP-OES and CV-AAS methods and the content of organic carbon by coulometric titration. The maximum detected contents were: mercury 0.575 mg/kg, arsenic 17 mg/kg, barium 126 mg/kg, chromium 309 mg/kg tin, 15 mg/kg, zinc 742 mg/kg, cobalt 4 mg/kg, copper 80 mg/kg, nickel 39 mg/kg and lead 53 mg/kg. It was estimated that in the bed of the Canal for a distance of approximately 5 500 m was deposited around 66 000 m 3 sediments. In about 15 000 m 3 sediment accumulated at the sluice Okole found to exceed permissible levels of cadmium and chromium.