福島で放射性セシウムを吸着・固定している鉱物は何か

• 小暮 敏博

  東京大学大学院理学系研究科地球惑星科学専攻

• 向井 広樹

  東京大学大学院理学系研究科地球惑星科学専攻

• 甕 聡子

  東京大学大学院理学系研究科地球惑星科学専攻

書誌事項

タイトル別名

• Identification of Cs-sorbing minerals in Fukushima
• フクシマ デ ホウシャセイ セシウム オ キュウチャク ・ コテイ シテ イル コウブツ ワ ナニ カ

抄録

Mineral species that really retain radioactive cesium in Fukushima soil have been investigated by analyzing actual contaminated soil samples in Fukushima using IP autoradiography, electron microscopy and X-ray diffraction. Weathered biotite originated from granitic body in Fukushima was frequently found as radioactive fine particles. The weathered biotite is mineralogically a biotite-vermiculite mixed-layer mineral. Besides, smectite-like clay mineral was identified in biotite-free particles using X-ray diffraction. A new cesium-sorption experiment was conducted, in which various clay minerals were immersed together in dilute ¹³⁷Cs radioisotope solutions and the amount of ¹³⁷Cs adsorbed in each mineral was measured by IP autoradiography to reproduce the sorption at actual concentration level in the radioactive particles. It was found that ¹³⁷Cs was sorbed predominantly by the weathered biotite collected in Fuku shima, confirming the results from the investigation of the actual contaminated soil mentioned above.

収録刊行物

• 地球化学

  地球化学 49 (4), 195-201, 2015

  一般社団法人日本地球化学会

キーワード

• Radiative contamination
• Clay minerals
• Biotite
• Radioactive cesium
• Autoradiography

詳細情報

• CRID: 1390282680719857152
• NII論文ID: 130005118187
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.49.195
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 027044975
• Web Site: http://id.ndl.go.jp/bib/027044975
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027044975
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可