Analysis of 134Cs and 137Cs distribution in soil of Fukushima prefecture and their specific adsorption on clay minerals

A. Maekawa, N. Momoshima, Shinji Sugihara, R. Ohzawa, A. Nakama

研究成果: ジャーナルへの寄稿記事

7 引用 (Scopus)

抄録

We collected surface soil samples within 60 km from the Fukushima Daiichi Nuclear Power Plants (FDNPP) and analyzed spatial and temporal radiocesium distributions. No large change in vertical distribution pattern of radiocesium has been observed on the samples collected in April 2011 and April 2012 at the same sampling points, suggesting strong adsorption of 134Cs and 137Cs on soil. Cesium is known to be adsorbed specifically on clay minerals in soil. To confirm the specific adsorption of Cs on clay minerals in these samples, we divided the soil into different particle sizes and measured the activity in each size fraction. The activity was highest in the clay fraction (<2 μm) and tended to decrease as the particle size increases. The radiocesium interception potential (RIP), which is defined by the product of the frayed edge sites (FES) capacity and Cs-K selectivity coefficient, was measured using carrier-free 137Cs. No correlation between the value of RIP and the penetration depth of radiocesium was observed, probably suggesting other important physicochemical factors.

元の言語英語
ページ(範囲)1485-1489
ページ数5
ジャーナルJournal of Radioanalytical and Nuclear Chemistry
303
発行部数2
DOI
出版物ステータス出版済み - 1 1 2015

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Clay minerals
Adsorption
Minerals
Soil
Soils
Particle Size
Particle size
Nuclear Power Plants
Cesium
Nuclear power plants
Clay
Sampling
clay

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Health, Toxicology and Mutagenesis
  • Pollution
  • Public Health, Environmental and Occupational Health
  • Spectroscopy
  • Radiology Nuclear Medicine and imaging

これを引用

Analysis of 134Cs and 137Cs distribution in soil of Fukushima prefecture and their specific adsorption on clay minerals. / Maekawa, A.; Momoshima, N.; Sugihara, Shinji; Ohzawa, R.; Nakama, A.

:: Journal of Radioanalytical and Nuclear Chemistry, 巻 303, 番号 2, 01.01.2015, p. 1485-1489.

研究成果: ジャーナルへの寄稿記事

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AU - Momoshima, N.

AU - Sugihara, Shinji

AU - Ohzawa, R.

AU - Nakama, A.

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N2 - We collected surface soil samples within 60 km from the Fukushima Daiichi Nuclear Power Plants (FDNPP) and analyzed spatial and temporal radiocesium distributions. No large change in vertical distribution pattern of radiocesium has been observed on the samples collected in April 2011 and April 2012 at the same sampling points, suggesting strong adsorption of 134Cs and 137Cs on soil. Cesium is known to be adsorbed specifically on clay minerals in soil. To confirm the specific adsorption of Cs on clay minerals in these samples, we divided the soil into different particle sizes and measured the activity in each size fraction. The activity was highest in the clay fraction (<2 μm) and tended to decrease as the particle size increases. The radiocesium interception potential (RIP), which is defined by the product of the frayed edge sites (FES) capacity and Cs-K selectivity coefficient, was measured using carrier-free 137Cs. No correlation between the value of RIP and the penetration depth of radiocesium was observed, probably suggesting other important physicochemical factors.

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