| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2026-01-13 |
| タイトル |
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タイトル |
Humidity-dependent radon retention in zeolite and non-zeolite sorbents for 225Ac production facilities |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Miroslaw Janik
janik
Ichinose Jun
Nagatsu Kotaro
Kodaira Satoshi
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Efficient mitigation of 222Rn releases is essential for the safe handling of 226Ra and related -emitters used in targeted radiotherapy. We evaluated a suite of sorbent materials, including silver-exchanged zeolites and activated carbon, under controlled laboratory conditions. Breakthrough experiments were conducted at defined dew points, and 222Rn retention was quantified using retention time (), adsorption coefficient (), and radon retention capacity (). Across all materials, values decreased systematically with increasing dew point, confirming the strong competitive effect of water vapor. Silver-exchanged Ag-ETS-10 zeolite exhibited the highest initial performance ( up to 120 m3 /kg at low humidity), whereas activated carbon and Ag-MOR-2 showed lower but more humidity-tolerant behavior. Regeneration studies demonstrated that several Ag-zeolites retained a substantial fraction of their capacity after reuse. These findings highlight both the potential and the limitations of silver-based zeolites, particularly Ag-ETS-10, and underscore the importance of humidity control and regeneration protocols in the design of radon traps for isotope production facilities. |
| 書誌情報 |
Applied Radiation and Isotopes
巻 229,
p. 112416,
発行日 2026-01
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| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1016/j.apradiso.2025.112416 |
