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Mechanism of $$^{99}$$Mo adsorption and $$^{rm 99m}$$Tc elution from zirconium-based material in $$^{99}$$Mo/$$^{rm 99m}$$Tc generator column using neutron-irradiated natural molybdenum

中性子照射済天然同位体モリブデンを用いた$$^{99}$$Mo/$$^{rm 99m}$$Tcジェネレータ用ジルコニウム系モリブデン吸着剤への$$^{99}$$Mo吸着及びTc-99m溶離メカニズム

Awaludin, R.*; Gunawan, A. H.*; Lubis, H.*; Sriyono*; Herlina*; Mutalib, A.*; 木村 明博 ; 土谷 邦彦 ; 棚瀬 正和*; 石原 正博 

Awaludin, R.*; Gunawan, A. H.*; Lubis, H.*; Sriyono*; Herlina*; Mutalib, A.*; Kimura, Akihiro; Tsuchiya, Kunihiko; Tanase, Masakazu*; Ishihara, Masahiro

ジルコニウム系モリブデン吸着剤は、Mo吸着性能が高いため、中性子照射済天然同位体モリブデン用$$^{99}$$Mo/$$^{rm 99m}$$Tcジェネレータに適している。しかしながら、Mo吸着及び$$^{rm 99m}$$Tc溶離のメカニズムについては解明されていない。本研究では、Mo吸着及び$$^{rm 99m}$$Tc溶離メカニズムをMo吸着前後及び$$^{rm 99m}$$Tc溶離後の吸着剤表面のSEM-EDSによる元素分析等により調査した。その結果、塩素イオンとMoイオンとのイオン交換反応によりMoが吸着することが確認できた。一方、溶離の過程で酸化剤を添加することにより$$^{rm 99m}$$TcはTcO$$_{4}$$$$^{-}$$の状態で溶離することが明らかとなった。

In this study, the $$^{99}$$Mo adsorption and $$^{rm 99m}$$Tc elution mechanism were investigated using SEM-EDS to analyze the elemental composition of the material surfaces before Mo adsorption, after Mo adsorption and after $$^{rm 99m}$$Tc elution using saline solution. The results were compared with the value of adsorption capacity of the material to irradiated natural Mo and elution yield of $$^{rm 99m}$$Tc. From the changes of elemental composition in the surface, it was found that molybdate ions were adsorbed into the adsorbent by ion exchange with Cl$$^{-}$$ ion in the material. On the other hand, it was also revealed that $$^{rm 99m}$$Tc can be eluted from the material column in TcO$$_{4}$$$$^{-}$$ since oxidizing agent was needed in the elution process.

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パーセンタイル:65.81

分野:Chemistry, Analytical

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