137Cs and 90Sr in live and dead reindeer lichens (genera Cladonia) from the 'Kraton-3' underground nuclear explosion site
| Autor: | Kasper Grann Andersson, Valery Ramzaev, M. Kaduka, Arkady Mishine, Justin Brown, Larisa Basalaeva |
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| Rok vydání: | 2006 |
| Předmět: |
Nuclear explosion
Radioactive Fallout Lichens Health Toxicology and Mutagenesis Mineralogy Explosions Risk Assessment Russia Environmental Chemistry Animals Lichen Waste Management and Disposal Radionuclide Cladonia biology Geography General Medicine biology.organism_classification Pollution Homogeneous Cesium Radioisotopes Environmental chemistry Strontium Radioisotopes Environmental science Radioactive Pollutants Reindeer |
| Zdroj: | Journal of environmental radioactivity. 93(2) |
| ISSN: | 0265-931X |
| Popis: | The contents of 137 Cs and 90 Sr have been determined in 29 samples of live and dead reindeer lichens (genera Cladonia ) collected at the “Kraton-3” underground nuclear explosion site (65.9°N 112.3°E, event year – 1978) in Yakutia, Russia in 2002. The area contamination was within the range of 0.36–700 and 0.13–770 kBq m −2 for 137 Cs and 90 Sr, respectively. The dead organisms were on average much more contaminated than the live ones. Vertical fractionation of the live lichen carpet demonstrated maximal activity concentrations of both radionuclides in the lower older section of the plants, while for the dead lichens the maximal activity concentrations of 137 Cs were detected in the upper part. The vertical distribution of 90 Sr was more or less homogeneous in the cushions of dead lichens. Elevated levels of 137 Cs and 90 Sr activity concentrations were also detected in the re-establishing young lichens growing over the residua of some dead lichens. |
| Databáze: | OpenAIRE |
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