caa a22 4500 469112123 CHVBK 20180323133114.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF02034896 doi (NATIONALLICENCE)springer-10.1007/BF02034896 Sediments of Ypacarai Lake [Elektronische Daten] [R. Velazquez, R. Alviso, J. Facetti] 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. Akadémiai Kiadó, 1992 Velazquez R. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut Alviso R. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut Facetti J. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/1(1992-08-01), 233-238 0236-5731 161:1<233 1992 161 10967 https://doi.org/10.1007/BF02034896 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02034896 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Velazquez R. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut NATIONALLICENCE 700 1- Alviso R. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut NATIONALLICENCE 700 1- Facetti J. Comisión de Energía Atómica, De Gaulle 980, Asunción, Paraguay aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/1(1992-08-01), 233-238 0236-5731 161:1<233 1992 161 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer