Composition, structure and size distribution of suspended particulates from the Rhine River.
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 aggregation scheme.
LEM-ENSG, CNRS UMR 7569, Rue du Doyen Roubault, BP 40, 15, avenue du Charmois F-54501 Vandoeuvre, France. bruno.lartiges@ensg.u-nancy.fr
B S
BS
Lartiges
S
S
Deneux-Mustin
G
G
Villemin
C
C
Mustin
O
O
Barrès
M
M
Chamerois
B
B
Gerard
M
M
Babut
D005602:France; D005618:Fresh Water; D010316:Particle Size; D014873:Water Pollutants / Q000032:analysis*
D014873:Water Pollutants