Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
11007419 | Journal of Environmental Radioactivity | 2018 | 6 Pages |
Abstract
We investigated 134Cs and 137Cs activity concentrations in the common Japanese moss species Hypnum plumaeforme collected from 32 sites within ca. 100â¯km radius of the Fukushima Dai-ichi Nuclear Power Plant. A total of 32 samples of H. plumaeforme were collected during the field surveys from November 2013 to September 2014. The maximum radiocesium activity concentrations in H. plumaeforme were 60.9â¯Â±â¯1.8â¯kBq kgâ1 for 134Cs and 123â¯Â±â¯2.3â¯kBq kgâ1 for 137Cs. The mean value for the 134Cs/137Cs was 1.17â¯Â±â¯0.05, and the mean Tag value was 0.09â¯Â±â¯0.13. Positive correlations were obtained between total 134Cs + 137Cs activity concentrations in H. plumaeforme and the air dose rate with a correlation coefficient (r) of 0.55 (Pâ¯=â¯0.001), and between 137Cs activity concentration in H. plumaeforme and 137Cs deposition density on soil with r of 0.55 (Pâ¯=â¯0.001). These results suggest that the perennial moss species H. plumaeforme could be more suitable and useful as a qualitative indicator for the radiocesium pollution compared to vascular plants spreading over the lowlands including human habitation in Fukushima Prefecture.
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Authors
Emiko Oguri, Hironori Deguchi,