Dissolved and particulate trace metals in meltwater from the Rhône glacier |
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| Authors: | Ken Lum-Shue-Chan |
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| Institution: | (1) Present address: Environmental Contaminants Division, National Water Research Institute, Canada Centre for Inland Waters, 867 Lakeshore Road, P. O. Box 5050, L7R4A6 Ontario, Canada |
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| Abstract: | Glacial meltwater and sediment at the source of the River Rhône have been analyzed to determine: 1. the partitioning of Al, Cd, Co, Cu, Cr. Fe, Mn, Ni, Pb and Zn between the water and particulate phase. 2. the particle size ranges which affect the dissolved trace metal ion composition of the meltwater and 3. the availability (potential release) of the ten trace metal ions from the sediment. Greater than 80% of the total Cd, Cu, Mn, Ni and Zn were found to be in operationally-defined (0.4 μm) dissolved forms. Fe and Al in the meltwater are primarily associated with particles in the size range 0.4–8 μm, while Cd. Cu, Mn, Ni and Zn occur with particles smaller than 0.1 μm. For the sediment, Cu, Ni and Pb were significantly present as exchangeable forms; only Cu, Ni, Pb and Zn were determined as organicallybound forms. |
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