JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-3 displayed on this page of 3
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Accumulation mechanisms of radiocaesium within lichen thallus tissues determined by means of ${it in situ}$ microscale localisation observation

Dohi, Terumi; Iijima, Kazuki; Machida, Masahiko; Suno, Hiroya*; Omura, Yoshihito*; Fujiwara, Kenso; Kimura, Shigeru*; Kanno, Futoshi*

PLOS ONE (Internet), 17(7), p.e0271035_1 - e0271035_21, 2022/07

https://doi.org/10.1371/journal.pone.0271035
 Times Cited Count：4 Percentile：26.49(Multidisciplinary Sciences)

Journal Articles

Radiocaesium activity concentrations in parmelioid lichens within a 60 km radius of the Fukushima Dai-ichi Nuclear Power Plant

Dohi, Terumi; Omura, Yoshihito*; Kashiwadani, Hiroyuki*; Fujiwara, Kenso; Sakamoto, Yoshiaki; Iijima, Kazuki

Journal of Environmental Radioactivity, 146, p.125 - 133, 2015/08

https://doi.org/10.1016/j.jenvrad.2015.04.013
 Times Cited Count：22 Percentile：51.80(Environmental Sciences)

Radiocaesium activity concentrations ($$^{134}$$Cs, $$^{137}$$Cs) were measured in parmelioid lichens collected within the Fukushima Prefecture approximately 2 y after the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident. A total of 44 samples consisting of nine species were collected at 16 points within a 60 km radius of the FDNPP. The activity concentration of $$^{134}$$Cs ranged from 4.6 to 1000 kBq kg$$^{-1}$$ and for $$^{137}$$Cs ranged from 7.6 to 1740 kBq kg$$^{-1}$$. A significant positive correlation was found between the $$^{137}$$Cs activity concentration in lichens and the $$^{137}$$Cs deposition density on soil, based on the calculated Spearman's rank correlation coefficients as $$r$$ = 0.90 ($$P$$ $$<$$ 0.01). The two dominant species, Flavoparmelia caperata and Parmotrema clavuliferum, showed strong positive correlations, for which the r values were calculated as 0.92 ($$P$$ $$<$$ 0.01) and 0.90 ($$P$$ $$<$$ 0.01) respectively. Therefore, they are suggested as biomonitoring species for levels of radiocaesium fallout within the Fukushima Prefecture.

Oral presentation

Preliminary investigation of elemental compositions in the particles on ${it Parmotrema tinctorum}$ collected around the Fukushima Dai-ichi Nuclear Power Plant

Dohi, Terumi; Omura, Yoshihito*; Fujiwara, Kenso; Kikuchi, Naoyuki; Iijima, Kazuki

no journal, , 

A plenty of various radionuclides was released into the atmosphere by the Fukushima Dai-ichi Nuclear Power Plant (FDNPP) accident. The local radioactive contaminations (i.e. radioactive plume's trajectory) around the FDNPP were caused by the releasing radionuclides from each reactor, meteorological and geographical conditions, etc. In order to clarify the contamination characteristics of the plume's trajectory, we focused on lichen samples that are well known organism to retain radionuclides for a long period. A field investigation was carried out around the FDNPP on January 2016. ${it Parmotrema tinctorum}$, a common species at the area, growing on trunks of trees was collected around the FDNPP. The fragments of lichen thalli were analyzed by the scanning electron microscope coupled with energy dispersive X-ray spectrometer (SEM-EDS). Heavy metal particles were detected on the surface of${it P. tinctorum}$. They might originate from reactors of the FDNPP because they contain anthropogenic elements such as, (Fe, Zn), (Cd, Zn), (Zr, Ti), (Fe, Zn, Cr), (Ti, Fe, Ce), (Fe, Ti, Cr, Ni), (Fe, Cr, Zn, Cd), etc. Further data of the elemental composition in particles on lichen samples would be helpful to discuss the differences among the radioactive plume's trajectories from each reactor.

3 (Records 1-3 displayed on this page)
  • 1