エアロゾル研究
Online ISSN : 1881-543X
Print ISSN : 0912-2834
特集「福島第一原発事故による放射性エアロゾル」
原子力発電所事故で放出された不溶性放射性粒子の形態と組成
足立 光司
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ジャーナル 認証あり

32 巻 (2017) 4 号 p. 255-260

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Insoluble radioactive particles emitted from the Fukushima nuclear accident have been found from the samples collected in various environments. This manuscript summarizes the studies that characterized such particles using electron microscopy and synchrotron radiation analyses. The shapes and compositions of 33 radioactive particles from aerosol particles, soil, plant tissues, non-woven fabric cloth, and masks have been identified. These radioactive particles contained radioactive Cs ranging from 0.5 to 109 becquerel per particle. Diameters of spherical particles ranged from 0.8 to 4 μm, and those of non-spherical particles were from 1.4 to 250 μm. They consisted of silicate glass with Cs, Zn, and Fe as well as many minor elements (in total, 33 elements were detected). These particles tended to have more Cs on their surface than the core and contained nano-crystals consisting of, for example, Cu-Zn-Mo, Ag-Te, CaSO4, FeCr2O4, Sn-Te, Ag-Sb, and iron oxides. Such crystalline structures will be important to understand the formation and degradation processes.

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© 2017 日本エアロゾル学会
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