文章基本信息

标题：Collective Structural Changes in Vermiculite Clay Suspensions Induced by Cesium Ions
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作者：Ryuhei Motokawa ; Hitoshi Endo ; Shingo Yokoyama 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：4
期号：1
DOI：10.1038/srep06585
语种：English
出版社：Springer Nature
摘要：Following the Fukushima Daiichi nuclear disaster in 2011, Cs radioisotopes have been dispersed over a wide area. Most of the Cs has remained on the surface of the soil because Cs⁺ is strongly adsorbed in the interlayer spaces of soil clays, particularly vermiculite. We have investigated the microscopic structure of an aqueous suspension of vermiculite clay over a wide length scale (1–1000 Å) by small-angle X-ray scattering. We determined the effect of the adsorption behavior of Cs⁺ on the structural changes in the clay. It was found that the abruption of the clay sheets was induced by the localization of Cs⁺ at the interlayer. This work provides important information for predicting the environmental fate of radioactive Cs in polluted areas, and for developing methods to extract Cs from the soil and reduce radioactivity.