Cesium desorption behavior of weathered biotite in Fukushima considering the actual radioactive contamination level of soils

Journal of Environmental Radioactivity
Hiroki MukaiToshihiro Kogure

Abstract

For the better understanding of radioactive contamination in Fukushima Prefecture at present and in future, Cs desorption experiments have been conducted mainly using weathered biotite (WB) collected from Fukushima Prefecture and considering the actual contamination level (∼10-10 wt%) of radiocesium in Fukushima Prefecture. In the experiments, 137Cs sorbed to WB by immersing in 137Cs solution for one day was mostly desorbed by solutions of 1 M NaNO3, 1 M LiNO3, 10-1 M HCl, and 10-1 M HNO3, although it was barely desorbed by 1 M KNO3, 1 M CsNO3, 1 M NH4NO3, and natural seawater. X-ray diffraction analysis of WB after immersing in these solutions suggested that the collapse of the hydrated interlayers in WB suppressed the desorption of Cs. On the other hand, 137Cs was barely desorbed from WB even by the treatments with solutions of NaNO3 and LiNO3 if the duration for the sorption was longer than approximately two weeks, as well as radioactive WB collected from actual contaminated soils in Fukushima Prefecture. This result implies that Cs sorbed in WB became more strongly fixed with time. Probably removal of radiocesium sorbed in weathered granitic soil at Fukushima Prefecture is difficult by any electrolyte solutions, as more tha...Continue Reading

Citations

Nov 11, 2020·Environmental Science and Pollution Research International·Michael D KaminskiMatthew Magnuson
Oct 17, 2020·Journal of Environmental Radioactivity·Hanyu WuMingliang Kang
Jul 24, 2020·Journal of Environmental Chemical Engineering·Michael D KaminskiMatthew Magnuson
May 19, 2020·Journal of Environmental Radioactivity·A DelavalO Radakovitch
Oct 18, 2019·Journal of Environmental Radioactivity·Dominique Salomé Kwong-MosesDavid M Avant

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