90Sr specific activity of teeth of abandoned cattle after the Fukushima accident – teeth as an indicator of environmental pollution

Kazuma Koarai, Yasushi Kino, Atsushi Takahashi, Toshihiko Suzuki, Yoshinaka Shimizu, Mirei Chiba, Ken Osaka, Keiichi Sasaki, Yusuke Urushihara, Tomokazu Fukuda, Emiko Isogai, Hideaki Yamashiro, Toshitaka Oka, Tsutomu Sekine, Manabu Fukumoto, Hisashi Shinoda

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)1-6
Number of pages6
JournalJournal of Environmental Radioactivity
Volume183
DOIs
Publication statusPublished - 2018 Mar

Keywords

  • Cattle teeth
  • Environmental pollution
  • Fukushima-Daiichi Nuclear Power Plant accident
  • Sr
  • Sr specific activity
  • Transfer

ASJC Scopus subject areas

  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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