Sorption behavior of iodine on calcium silicate hydrates formed as a secondary mineral

Keisuke Shirai, Yuichi Niibori, Akira Kirishima, Hitoshi Mimura

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

This study examined the sorption behaviors of iodine into CSH gel without dried processes, considering the repository system saturated with groundwater after the backfilling. In glove box saturated with N2 gas, each sample of CSH gel was synthesized with CaO, SiO2, and distilled water with liquid/solid ratio 20. Then, 1 mM iodine solution is added into the aqueous solution including the CSH gel with various Ca/Si molar ratios under the isothermal condition (298 K). In the results, even if the Ca/Si ratio is relatively small (<1.0), the distribution coefficients (Kd) of iodine on CSH gel without dried processes were two-order of magnitude larger than those with dried processes. For example, the value of Kd (ml/g) was about 380 in the case of 0.5 in Ca/Si molar ratio. Furthermore, it was confirmed the sorption behavior attain equilibrium in 24 hours. These suggest secondary mineral of CSH gel would retard the migration of anionic nuclides under the condition saturated with groundwater. In comparison, this study prepared also the co-precipitated samples of CSH gel and iodine, where the 1 mM iodine solution is added before curing the CSH gel. These distribution coefficients and the kinetics almost agreed with those mentioned above.

本文言語English
ホスト出版物のタイトルASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, ICEM2010
ページ237-242
ページ数6
DOI
出版ステータスPublished - 2010
イベントASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, ICEM2010 - Tsukuba, Japan
継続期間: 2010 10月 32010 10月 7

出版物シリーズ

名前Proceedings of the International Conference on Radioactive Waste Management and Environmental Remediation, ICEM
2

Other

OtherASME 2010 13th International Conference on Environmental Remediation and Radioactive Waste Management, ICEM2010
国/地域Japan
CityTsukuba
Period10/10/310/10/7

ASJC Scopus subject areas

  • 安全性、リスク、信頼性、品質管理
  • エネルギー工学および電力技術
  • 廃棄物管理と処理

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