Enrichment of tritiated water using mesoporous silica

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• 作者：Akira Taguchi ; Yuki Kato ; Yuji Torikai ; Masao Matsuyama ; Sayaka Uchida
• 关键词：Mesoporous silica ; Tritium ; Radioisotope ; Enrichment
• 刊名：Microporous and Mesoporous Materials
• 出版年：2013
• 出版时间：15 September, 2013
• 年：2013
• 卷：179
• 期：Complete
• 页码：217-223
• 全文大小：1243 K

文摘

The enrichment of tritiated water in desorption from micro- and meso-porous materials was studied. Among the adsorbents MCM-41, SBA-15, LTA(5A), and amorphous SiO₂, MCM-41 showed the best enrichment ability. The tritium (T) desorption profile of MCM-41, along with ²⁹Si magic-angle spinning nuclear magnetic resonance spectroscopy, thermogravimetric analysis, and Fourier-transform infrared spectroscopy suggested that dehydration via the condensation of silanol groups containing T species, such as Si-OT, contributed to the enrichment of tritiated water. In contrast, the desorption of HTO molecules trapped in zeolite cages and channels was dominant in LTA(5A). The results also suggested the superiority of mesoporous structures for the enrichment of tritiated water.