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Open AccessArticle

Effect of Flowing Water on Sr Sorption Changes of Hydrous Sodium Titanate

1
Department of Fukushima Technology Development, Japan Atomic Energy Agency, 4-33 Muramatsu, Tokai-mura, Ibaraki 319-1194, Japan
2
Graduate School of Engineering, Hokkaido University N13W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
3
Division of Sustainable Resource Engineering, Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
*
Author to whom correspondence should be addressed.
Minerals 2017, 7(12), 247; https://doi.org/10.3390/min7120247
Received: 10 November 2017 / Revised: 4 December 2017 / Accepted: 11 December 2017 / Published: 14 December 2017
(This article belongs to the Special Issue Environmental Mineralogy)
Radioactive contaminated water has been generated at the Fukushima Daiichi Nuclear Power station (F1NPS). Hydrous sodium titanate (SrTreat®) is able to remove radioactive Strontium (Sr) from this water. Knowing the amount of radioactive nuclides in the used as-received SrTreat® is important for effective disposal and deposition of the F1NPS waste. This study investigated changes in the ability of SrTreat® to sorb Sr, and to understand the causes of changes in the sorbing. An investigation of the Sr sorption ability of SrTreat® is important for calculating the initial radioactive inventory of used SrTreat®. This study carries out Sr sorption studies with acid-base titrations and X-ray photoelectron spectroscopy (XPS) to characterize the properties. After exposure to simulated treated water for 99 h, the surface structure of the SrTreat® was changed, and the percentage of sorbed Sr and the buffer capacity for protons decreased. When the amount of radioactive nuclides contained in the used SrTreat® is calculated from the sorption data of the as-received SrTreat®, the radioactive Sr content will be overestimated with a concomitant increase in the deposition and disposal costs of the used SrTreat®. View Full-Text
Keywords: Fukushima Daiichi Nuclear Power Station; radioactive contaminated water; hydrous sodium titanate; Sr sorption; X-ray photoelectron spectroscopy Fukushima Daiichi Nuclear Power Station; radioactive contaminated water; hydrous sodium titanate; Sr sorption; X-ray photoelectron spectroscopy
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Takahatake, Y.; Shibata, A.; Nomura, K.; Sato, T. Effect of Flowing Water on Sr Sorption Changes of Hydrous Sodium Titanate. Minerals 2017, 7, 247.

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