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Sediments of Ypacarai Lake

  • Applications of Radioanalytical Methods to Geological and Environmental Science
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Abstract

Bottom and sestonic sediments of Ypacarai Lake were invesetigated with XRF and Mössbauer techniques. The 120 km2 lake, depth averages 1.8 m. In addition to the lakes use for recreation, its basin has economic significance. Sediments play an important role in the distribution of trace elements in the aquatic system and as a sink for metals. Bottom and seston samples were taken from 4 different sampling stations which were selected according the morphology and population sites on the shore. The concentration of toxic metals was found to be low and no adverse ecological impact should be expected. The main metallic ion component is iron (1.68%). Mössbauer studies showed this element appears as Fe3+. Iron2+ was not detected. We suggest that Fe3+ acts as the limiting element which controls the eutrophication process.

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Authors and Affiliations

  1. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay

    R. Velazquez, R. Alviso & J. Facetti

Authors
  1. R. Velazquez
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  2. R. Alviso
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  3. J. Facetti
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Additional information

This is in agreement with low values of phytoplancton counting found in water samples.

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Velazquez, R., Alviso, R. & Facetti, J. Sediments of Ypacarai Lake. Journal of Radioanalytical and Nuclear Chemistry, Articles 161, 233–238 (1992). https://doi.org/10.1007/BF02034896

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  • DOI: https://doi.org/10.1007/BF02034896

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