Chemical Composition of Organic Matter in Extremely Acid, Lignite-Containing Lake Sediments Impacted by Fly Ash Contamination
A. Chabbi*,a,c and
C. Rumpelb,c
a Brandenburg Technical University, Faculty of Environmental Science, Department of Soil Protection and Recultivation, P.O. Box 10 13 44, D-03013 Cottbus, Germany
b Lehrstuhl für Bodenkunde, Technische Universität München, D-85350 Freising-Weihenstephan, Germany
c CNRS, Laboratoire de Biogéochimie des Milieux Continentaux, Centre INRA Versailles-Grignon, Bâtiment EGER, Aile B, F-78820 Thiverval-Grignon, France

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Fig. 1. Illustration of Lake 109 in the KoynePlessa mining district (modified from Küsel, 2003).
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Fig. 2. Scanning electron microscope photograph of the 63- to 20-µm fraction of the upper 0 to 5 cm. Spherules of inorganic fly ash are clearly visible on the photomicrograph.
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Fig. 3. Carbon-13 cross polarization magic angle spinning (CPMAS) nuclear magnetic resonance (NMR) spectra of bulbous rush shoot and root and spectra of lignite fraction and lignite-derived ash material.
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Fig. 4. Carbon-13 cross polarization magic angle spinning (CPMAS) nuclear magnetic resonance (NMR) spectra of bulk soil and particle size fractions of acid lake sediments colonized by bulbous rush. Total mass, carbon content, and distribution of the size fractions are listed in Table 3.
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Copyright © 2004 by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.