著者
Yuki IWAHANA Atsushi OHBUCHI Yuya KOIKE Masaru KITANO Toshihiro NAKAMURA
出版者
(社)日本分析化学会
雑誌
Analytical Sciences (ISSN:09106340)
巻号頁・発行日
vol.29, no.1, pp.61-66, 2013-01-10 (Released:2013-01-10)
参考文献数
26
被引用文献数
5 or 0

Radioactive nuclides in the incinerator ashes of municipal solid wastes were determined by γ-ray spectrometry before and after the accident at the Fukushima nuclear power plant (March 11, 2011). Incinerator ash samples were collected in northern Kyushu, Japan, which is located approximately 1200 km west-southwest (WSW) of the Fukushima nuclear power plant, from April 2006 to March 2007 and from March 2011 to October 2011. 40K, 137Cs, 208Tl, 212Pb, 214Pb, 212Bi, 214Bi, and 228Ac were identified in the ashes before the accident (∼February 2011) and 134Cs was identified along with these eight nuclides in the ashes after the accident (March 2011∼). A sequential extraction procedure based on a modified Tessier method with added water extraction was used for 1st fly ash sampled in August 2011 because the highest activity concentrations of 134Cs and 137Cs were observed for this sample. The speciation of radioactive nuclides in the fly ash was achieved by γ-ray spectrometry and powder X-ray diffractometry for the extraction residues. Little variation was observed in the distribution of the chemical forms of 134Cs and 137Cs in 1st fly ash of municipal solid waste; one half of 134Cs existed as water soluble salts and the other half as carbonate compounds, whereas 75% of 137Cs existed as water soluble salts with the remainder as carbonates(10%) and sulfides (15%). These results show that 88% of the total radioactive Cs existed in water soluble and ion extractive forms and might be at risk for elution and diffusion with rain and wind.

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福島原発事故前後の一般ゴミ焼却灰の放射性物質濃度 https://t.co/FtNlogzGrm 九州北部の焼却灰を、2006年4月ー2007年3月と、2011年3ー10月で比較。 Cs137は事故前も検出。事故後はCs134も検出。 飛灰内Csの88%が水溶性の形態で存在。
Radioactive Nuclides in the Incinerator Ashes of Municipal Solid Wastes before & after the Accident @ Fukushima NPP https://t.co/FtNlogzGrm
【警告】  #移住 #被曝  RT @kinositakouta 【放射性物質の焼却灰を埋め立てに使うことに関しての危険】「セシウムの88%が水に溶けて、イオンが抽出される状態で存在。雨で溶け出し、風によって拡散の危険にさらされる可能性」 http://t.co/2SfhMDBk

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