Online ISSN: 1884-4111 Print ISSN: 0033-8303
Radioisotopes 69(2): 79-91 (2020)

連載講座Serial Lecture

化学から見た放射性核種の環境動態と長期予測土壌吸着による放射性セシウムの不動化はどのように評価すればよいか?Environmental Dynamics of Radionuclides and Its Long-term Predictions from Chemical SightHow Can We Evaluate the Immobilization of Radiocesium in Soil?

1京都府立大学大学院生命環境科学研究科応用生命科学専攻Graduate School of Life and Environmental Sciences, Kyoto Prefectural University

2東京大学大学院理学系研究科地球惑星科学専攻Graduate School of Earth and Planetary Science, Tokyo University

発行日:2020年2月15日Published: February 15, 2020


Radiocesium released from the Fukushima Dai-ichi Nuclear Power Plant migrates very slowly in soil as if it is immobilized at soil surface. The immobility of radiocesium is controlled by selective adsorption of radiocesium on the negatively-charged sites in phyllosilicates. This article introduces the principle and methodology to determine the selective adsorption site. Furthermore, this lecture introduces an example of the prediction model for soil-to-plant transfer of radiocesium by using the capacity of the selective adsorption site as an explanatory variable.

Key words: Fukushima Dai-ichi Nuclear Power Plant Accident; adsorption; radiocaesium interception coefficient; frayed edge site; Absalom model; selectivity coefficient

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