The composition of settling particles in Lake Zürich |
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| Authors: | Rudolf Giovanoli Rudolf Brütsch Dieter Diem Gertrud Osman-Sigg Laura Sigg |
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| Institution: | (1) Present address: Laboratory for Electron Microscopy, University of Bern, Sahlistrasse 6, Bern, Switzerland;(2) Present address: Institute for Aquatic Sciences, Swiss Federal Institute of Technology, EAWAG, CH-8600 Dübendorf, Switzerland |
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| Abstract: | Settling particles in the Lake Zürich were collected at different depths. Water samples and particles have been analyzed for
heavy metals and for organic matter elements. Samples were investigated by transmission electron microscopy, scanning electron
microscopy, energy dispersive X ray and X ray. The elemental composition of the settling particles was found to be almost
constant. Special remarks are made on iron and phosphate and on manganese. Manganese oxidizing microorganisms were found near
the bottom of the lake. |
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