Journal
WATER RESEARCH
Volume 35, Issue 3, Pages 808-816Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(00)00293-1
Keywords
aggregation; fluvial suspended matter; particulate; exopolymeric substances
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Fluvial suspended particulates collected from the Rhine River were investigated in terms of composition. structure and size distribution. Elemental analysis and Diffuse Reflectance infrared Spectroscopy reveal that most particulate organic matter is formed from material derived from microorganisms. Transmission Electron Microscopy observations on resin-embedded samples and structural characterization from break-up experiments. show that fluvial particulate matter should be viewed as fractal aggregates organized by bacterial exopolymeric substances. The shape of particulate size distribution suggests that the formation and dynamics of suspended particulate matter are controlled mainly by physical processes. Finally, particulate growth and structure are consistent with a cluster-cluster agregation scheme. (C) 2001 Elsevier Science Ltd. All rights reserved.
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