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Murota, Kento*; Aoyagi, Noboru; Mei, H.; Saito, Takumi*
Applied Geochemistry, 152, p.105620_1 - 105620_11, 2023/05
Times Cited Count：1 Percentile：56.68(Geochemistry & Geophysics)Saito, Takumi; Murota, Kento*
no journal, ,
Long-term behavior of radioactive cesium (
Cs) in soils is of great concern in radiation protection and storage and disposal of excavated soils in heavily contaminated areas by the accident of the Fukushima Daiichi Nuclear Plant (F1 NPP). Although a large number of research on the fixation of Cs in soils have been performed since the Chernobyl accident, long-term release behaviors of Cs from contaminated soils are relatively unknown, partly because the apparent strong uptake of Cs by micaceous minerals in soils, which leads to a static picture of its behavior in soils. This study tires to pose a question on this issue by statistically evaluating geochemical and size distribution of Cs in even Fukushima soils and performing long-term extraction experiments at the so-called "infinite bath" condition.
Murota, Kento*; Aoyagi, Noboru; Mei, H.; Saito, Takumi*
no journal, ,
In the fate of radionuclides leached from radioactive wastes in the underground, adsorption to small pores in rocks and buffer materials during migration is an important mechanism. It has been reported that water properties in mesoscale (2-50 nm) and nanoscale (
2 nm) pores differ from those in larger pores. However, it is not clear how the sorption of ions changes in confinement. In this study, Eu
was adsorbed on mesoporous silicas with different mesopore distributions as analogues of natural rocks with small pores, and the adsorption state was analyzed by TRLFS. We report the results of multivariate analysis of the obtained data to investigate how the adsorption state of Eu3+ changes with pore size.
