TY - JOUR
T1 - 90Sr specific activity of teeth of abandoned cattle after the Fukushima accident – teeth as an indicator of environmental pollution
AU - Koarai, Kazuma
AU - Kino, Yasushi
AU - Takahashi, Atsushi
AU - Suzuki, Toshihiko
AU - Shimizu, Yoshinaka
AU - Chiba, Mirei
AU - Osaka, Ken
AU - Sasaki, Keiichi
AU - Urushihara, Yusuke
AU - Fukuda, Tomokazu
AU - Isogai, Emiko
AU - Yamashiro, Hideaki
AU - Oka, Toshitaka
AU - Sekine, Tsutomu
AU - Fukumoto, Manabu
AU - Shinoda, Hisashi
N1 - Funding Information:
The authors thank the veterinary doctors at the Iwaki Livestock Hygiene Service Center in Fukushima Prefecture and the livestock farmers in the 20-km FNPP evacuation zone for their help, understanding, and cooperation with our study. We also thank Dr. Taihei Mitsui at the Iwate Meat Inspection Center for supplying control cattle teeth. We express our gratitude to Ms. Yoko Nakano (The Research and Analytical Center for Giant Molecules at the Graduate School of Science, Tohoku University) and Ms. Yoko Nakano (Technical Division, School of Engineering, Tohoku University) for their assistance with the calcium and strontium measurements by ICP-AES and ICP-QQQ. The authors would like to thank Dr. Keiko Tagami (National Institutes for Quantum and Radiological Science and Technology, Japan) for providing IAEA-Soil-6 reference soil. This study was funded by the Emergency Budget for the Reconstruction of Northeastern Japan, MEXT, Japan ; the Budget for the Study on the Health Effects of Radiation, Ministry of the Environment, Japan ; the Discretionary Expense of the President of Tohoku University ; Grant for Special Project Research from the International Research Institute of Disaster Science, Tohoku University ; and Grant-in Aid for Scientific Research (No. 25670891 , 26670898 , 26463155 , 15H05055 , 16K15849 , 16J05758 ), JSPS, Japan.
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3
Y1 - 2018/3
N2 - 90Sr specific activity in the teeth of young cattle that were abandoned in Kawauchi village and Okuma town located in the former evacuation areas of the Fukushima-Daiichi Nuclear Power Plant (FNPP) accident were measured. Additionally, specific activity in contaminated surface soils sampled from the same area was measured. (1) All cattle teeth examined were contaminated with 90Sr. The specific activity, however, varied depending on the developmental stage of the teeth during the FNPP accident; teeth that had started development before the accident exhibited comparatively lower values, while teeth developed mainly after the accident showed higher values. (2) Values of 90Sr-specific activity in teeth formed after the FNPP accident were higher than those of the bulk soil but similar to those in the exchangeable fraction (water and CH3COONH4 soluble fractions) of the soil. The findings suggest that 90Sr was incorporated into the teeth during the process of development, and that 90Sr in the soluble and/or leachable fractions of the soil might migrate into teeth and contribute to the amount of 90Sr in the teeth. Thus, the concentration of 90Sr in teeth formed after the FNPP accident might reflect the extent of 90Sr pollution in the environment.
AB - 90Sr specific activity in the teeth of young cattle that were abandoned in Kawauchi village and Okuma town located in the former evacuation areas of the Fukushima-Daiichi Nuclear Power Plant (FNPP) accident were measured. Additionally, specific activity in contaminated surface soils sampled from the same area was measured. (1) All cattle teeth examined were contaminated with 90Sr. The specific activity, however, varied depending on the developmental stage of the teeth during the FNPP accident; teeth that had started development before the accident exhibited comparatively lower values, while teeth developed mainly after the accident showed higher values. (2) Values of 90Sr-specific activity in teeth formed after the FNPP accident were higher than those of the bulk soil but similar to those in the exchangeable fraction (water and CH3COONH4 soluble fractions) of the soil. The findings suggest that 90Sr was incorporated into the teeth during the process of development, and that 90Sr in the soluble and/or leachable fractions of the soil might migrate into teeth and contribute to the amount of 90Sr in the teeth. Thus, the concentration of 90Sr in teeth formed after the FNPP accident might reflect the extent of 90Sr pollution in the environment.
KW - Sr
KW - Sr specific activity
KW - Cattle teeth
KW - Environmental pollution
KW - Fukushima-Daiichi Nuclear Power Plant accident
KW - Transfer
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U2 - 10.1016/j.jenvrad.2017.12.005
DO - 10.1016/j.jenvrad.2017.12.005
M3 - Article
C2 - 29274551
AN - SCOPUS:85038814469
SN - 0265-931X
VL - 183
SP - 1
EP - 6
JO - Journal of Environmental Radioactivity
JF - Journal of Environmental Radioactivity
ER -
