TRACE ELEMENTS IN SEDIMENTS OF THE BRDA RIVER IN BYDGOSZCZ
Journal Title: Biuletyn Państwowego Instytutu Geologicznego - Year 2012, Vol 450, Issue 450
Abstract
In the city of Bydgoszcz, sediment samples were taken from 22 embankment cones in the Brda River, formed near the outlets of sewers through which waste water was discharged into the river. One averaged sample, which was obtained by combining 4 to 9 full-thickness cores taken at different locations of the cone, was collected from each cone. The samples were analysed for As, Ba, Cr, Pb, Co, Cu, Ni, Sn and Zn contents by the ICP-OES method, and for Hg content using the AAS method with pre-concentration on a gold amalgamate trap. The maximum levels of individual elements were as follows: Hg – 2.72 mg/kg, Cd – 6.9 mg/kg Cr – 255 mg/kg, Sn – 19 mg/kg, Zn – 592 mg/kg, Cu – 231 mg/kg, Ni – 74 mg/kg, Pb – 301 mg/kg, and Ba – 233 mg/kg. The concentrations exceeding permissible limits of Hg, Pb, Cr, Cu, according to the Decree of the Minister of the Environment (Rozporządzenie, 2002) for dragged sediments, were found in 11 embankment cones. It was estimated that the embankment cones set up at the mouths of the sewers have accumulated about 8.6 thousand m[sup]3[/sup] of sediments, of which about 4.5 thousand m[sup]3[/sup] of sediments were uncontaminated and could be relocated within the body of water, and about 4.1 thousand m[sup]3[/sup] of sediments were contaminated.
Authors and Affiliations
Izabela BOJAKOWSKA, Stanisław WOŁKOWICZ, Przemysław DOBEK
Keywords
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