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Dredging of contaminated sediments in the weser estuary west germany chemical forms of some heavy metals



Dredging of contaminated sediments in the weser estuary west germany chemical forms of some heavy metals



Environmental Technology Letters 3(5): 199-208



Concentration and chemical forms of metals in bottom sediments and dredged mud of the Weser Estuary were studied. The sediments with the highest metal contents were found in the harbor basins of Bremen and in the mud shoal near Nordenham. Association types of the metals were divided into 2 groups: metals with relatively high potential of mobilization (Cd, Zn, ,n and Ni) and those that were strongly bound on particles (Cr, Cu, Pb and Fe). An estimation of the bioavailability of these metals based on chemical extraction studies was relevant to problems encountered during disposal of dredged materials.

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