Evaluation of Cs ageing by dynamics of Cs/Cs ratio in Andosol paddy fields with/without potassium fertilizer application.

Clicks: 330
ID: 109190
2020
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Emerging

Ranked #14 of 210 articles by views in Journal of environmental radioactivity

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 210 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
The mobility of Cs in soil decreases with time owing to fixation by micaceous minerals. Such ageing is a critical parameter for estimating and predicting annual change in Cs contamination risk of agricultural products. The decrease in the exchangeable fraction of Cs has traditionally been used as an index of the Cs ageing. Under field conditions, however, exchangeable Cs is influenced by several environmental factors. In this study, we propose a new index to evaluate the Cs ageing with minimum influence of environmental factors. The ratio of the exchangeable Cs fraction to exchangeable fraction of Cs ((Cs/Cs)) eliminates the influence of environmental factors on exchangeable Cs. We assessed the applicability of the (Cs/Cs) index, using a four-year field study of a rice paddy in allophanic Andosol, starting 200 days after the Fukushima Dai-ichi Nuclear Power Plant accident. The influence of K fertilization was also investigated. The Cs and Cs exchangeable fractions varied together, indicating that both were similarly controlled by environmental factors. The values of (Cs/Cs) decreased with time, reflecting Cs fixation by the ageing. The half-time of the (Cs/Cs) decline was 6.6-17.7 years. Relative to K fertilization, the lack of K fertilization seemed to affect the Cs ageing in two ways: the early Cs fixation progressed more rapidly, probably because fewer competing K ions were present, and the long-term ageing process was occasionally hampered, probably by the release of reserve K from micaceous minerals. The (Cs/Cs) values were similar to the ratio of the Cs to Cs transfer factor of the rice straw. Thus, we conclude that the (Cs/Cs) index is reliable for evaluating the Cs ageing, decrease in Cs mobility caused by the diffusion into micaceous mineral interlayer, in the field.
Reference Key
wakabayashi2020evaluationjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wakabayashi, Shokichi;Takahashi, Shigeru;Matsunami, Hisaya;Hamamatsu, Shioka;Hachinohe, Mayumi;Kihou, Nobuharu;Yamaguchi, Noriko;
Journal Journal of environmental radioactivity
Year 2020
DOI
S0265-931X(19)30639-3
URL
Keywords
ageing andosol cesium-137 exchangeable fraction isotope ratio potassium fertilization

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.