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Decontamination and volume reduction of cesium-contaminated soil by combining soil solidification with interpolyelectrolyte complex and wet classification

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Abstract

We propose a method for the decontamination and waste volume reduction of cesium-contaminated soil. The soils were solidified with an interpolyelectrolyte complex solution and classified into several size fractions by wet sieving. Gamma-ray spectrometry of these fractions showed that the distribution ratio of the activity concentration of coarse soil particles decreased, whereas that of soil particles under 0.075 mm increased relative to reference samples. Results showed that the fine soil particles, on which radioactive cesium accumulates, were removed from the surface of the coarse soil particles during sieving and washing, and remained in the washing water.

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Acknowledgments

The authors thank Professor Kenichi Ito (Univ. of Miyazaki, Japan) and Dr. Hirohisa Yamada (National Institute for Materials Science, Japan) for the support of wet classification, and Dr. Mitsuru Yamamura and Mr. Toru Ujiie (Japan Conservation Engineers & Co., LTD.) for the support of radioactivity measurement. This research was supported by the Strategic Funds for the Promotion of Science and Technology, Japan.

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Correspondence to Yuji Yamashita.

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Yamashita, Y., Yanase, N., Nagano, T. et al. Decontamination and volume reduction of cesium-contaminated soil by combining soil solidification with interpolyelectrolyte complex and wet classification. J Radioanal Nucl Chem 305, 583–587 (2015). https://doi.org/10.1007/s10967-015-4016-6

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  • DOI: https://doi.org/10.1007/s10967-015-4016-6

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