Partitioning of trace metals between particulate,colloidal and truly dissolved fractions in a polluted river: the Upper Vistula River (Poland) |
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| Institution: | 1. Freiburg University, Institute of Forest Sciences, Chair of Soil Ecology, D-79085 Freiburg, Germany;2. Berlin University of Technology, Institute of Ecology, Department of Soil Science, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany;3. University Koblenz-Landau, Institute for Environmental Sciences, Group of Environmental and Soil Chemistry, Fortstr. 7, D-76829 Landau, Germany;4. Berlin University of Technology, Institute of Ecology, Department of Soil Protection, Ernst-Reuter-Platz 1, D-10587 Berlin, Germany |
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| Abstract: | Metal partitioning depends on the physical–chemical conditions of a system and can be affected by anthropogenic inputs. In this study, the authors report the results of trace metal partitioning between particulate (>1.2 μm), colloidal (1.2 μm–1 kDa) and truly dissolved (<1 kDa) fractions in the polluted section of the Upper Vistula River compared with the non-polluted headwaters. It was found that the salt input in the Vistula River induced a decrease of colloid concentration and the increase of suspended particulate matter. Compared with upstream from the polluted section, the metal concentrations (Co, Cu, Cr, Mn and Zn) in the colloidal fraction were lower. It was mainly due to the rapid colloid coagulation at increased salinity, the competition with ligands and major ions (Ca and Mg) and the weak mobility of metals associated with particles at the pollution sources. |
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