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Chernobyl fallout in the Baltic Sea sediments investigated

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Marine Pollution Bulletin

Volume 70, Issues 1–2, 15 May 2013, Pages 210–218

…..These results are an important amendment to the radioactivity baseline of the Baltic Sea…..

Artificial radionuclides 90Sr and 241Am in the sediments of the Baltic Sea: Total and spatial inventories and some temporal trends

  • a Radiation and Nuclear Safety Authority, P.O. Box 14, FIN-00881 Helsinki, Finland
  • b Water Protection Association of The River Kokemäenjoki, P.O. Box 265, FIN-33101 Tampere, Finland

Kaisa-Leena Hutri, Jukka Mattila, Tarja Tuulikki Ikäheimonen, Vesa-Pekka Vartti. Artificial radionuclides 90Sr and 241Am in the sediments of the Baltic Sea: Total and spatial inventories and some temporal trends. Marine Pollution Bulletin 70 (2013) 210-218. DOI: http://dx.doi.org/10.1016/j.marpolbul.2013.03.007

Abstract

The Baltic Sea was contaminated by radioactivity following global nuclear fallout and later by the Chernobyl accident. Despite the decrease of radioactivity caused by radioactive decay, radionuclides have a prolonged residence time in the water of the Baltic Sea due to slow water exchange and relatively rapid sedimentation. Very little is known about the amounts or spatial differences of 90Sr and 241Am in the Baltic Sea sediments.

In this study, 20 sediment cores taken around the Baltic Sea were investigated to estimate inventories of these radionuclides.

The rough results show that the Chernobyl fallout added the amount of 90Sr in the same areas where the increase of 137Cs can be detected, whereas this is not the case for 241Am which is more evenly distributed in the sea bottom. In addition, local differences occur in the concentrations. These results are an important amendment to the radioactivity baseline of the Baltic Sea…. subscription only

http://www.sciencedirect.com/science/article/pii/S0025326X13001471

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June 4, 2013 - Posted by | Uncategorized

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