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| Titel |
Natural and Fukushima-derived radioactivity in macroalgae and mussels along the Japanese shoreline |
| VerfasserIn |
Z. Baumann, N. Casacuberta, H. Baumann, P. Masqué, N. S. Fisher |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 6 ; Nr. 10, no. 6 (2013-06-13), S.3809-3815 |
| Datensatznummer |
250018285
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| Publikation (Nr.) |
 copernicus.org/bg-10-3809-2013.pdf |
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| Zusammenfassung |
| Following the failure of the nuclear power plant in Fukushima Prefecture in
March 2011, peer-reviewed publications describing radioactivity levels in
organisms inhabiting coastal environments are scarce. This paper reports on
elevated levels of 134Cs and 137Cs in macroalgae and mussels (up to
~ 800 Bq kg−1 dry wt.) in June 2011. Cs concentrations in
biota sampled in early June 2011 were higher in areas south of Fukushima
than sampled in the last third of the month north of Fukushima. Activity
concentrations from 134+137Cs in organisms south of Fukushima were
comparable to or lower than those from the naturally occurring 40K in
the same samples. While 210Pb and 210Po concentrations were
generally lower than these other radionuclides, 210Po as an α-emitter is more significant
from a radiological viewpoint than γ-emitters as it can inflict greater biological damage. By applying known
bioconcentration factors of Cs in biota, measured biota concentrations of Cs
were also used to estimate Cs concentrations in coastal seawater to be in
the range of 102–103 Bq m−3. These estimates show that, 3
months after the accident and maximal release of radioactive Cs, levels of
Cs persisted in coastal waters, although at levels that were two orders of
magnitude lower than at the time of release. These June coastal seawater Cs
levels were four orders of magnitude above Cs concentrations off Japan prior
to the Fukushima disaster. |
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