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Sasaki, Yuji; Ban, Yasutoshi; Morita, Keisuke; Matsumiya, Masahiko*
no journal, ,
Although rare earth elements show low concentration in the crust, these metals are available widely in the industrial field. It is important to know the better methods for mutual separation and recovery of the rare earth elements. These elements in nitric acid can be extracted by diglycolamide compounds, however, it shows low mutual separation ratio. Then in order to increase the separation efficiency, multi-step counter-current extraction is applied. In this presentation, the basic results concerning this extraction method will be discussed.
Saegusa, Yu; Yamamoto, Masahiko; Inada, Satoshi; Kuno, Takehiko
no journal, ,
Selenium-79 is a long half-life nuclide and emits low energy beta ray. Although it is difficult to analyze by radioactivity method, selenium-79 has high analytical needs for dose assessment due to the high occupancy rate of public exposure in the geological disposal of vitrified solids accompanying reprocessing of spent fuel. Selenium-79 can be measured by inductively coupled plasma mass spectrometry, however, accurate analysis is difficult due to the isobaric interference. In this study, we investigated analytical method for selenium-79 by inductively coupled plasma mass spectrometry with collision reaction cell technique. Selenium-79 can be measured after reaction with oxygen gas the cell and shift higher mass number. We will report the basic experiment results to measure selenium by collision reaction cell typed ICP-MS in this presentation.
Sr; Study of safe Sr adsorption with no nitric acidKonda, Miki; Horita, Takuma; Asai, Shiho; Hanzawa, Yukiko; Saito, Kyoichi*; Fujiwara, Kunio*; Sugo, Takanobu*; Ishimori, Kenichiro; Kameo, Yutaka
no journal, ,
no abstracts in English
Kaneta, Yui*; Suzuki, Shinichi; Yaita, Tsuyoshi
no journal, ,
no abstracts in English
Abe, Yuta; Yamashita, Takuya; Kawakami, Tomohiko*
no journal, ,
no abstracts in English
Okazaki, Kodai*; Kawakami, Tomohiko*; Abe, Yuta; Otaka, Masahiko
no journal, ,
no abstracts in English
Hasegawa, Yuri; Honda, Mitsunori; Suzuki, Shinichi; Yaita, Tsuyoshi
no journal, ,
Biotite has been getting great attention in the field of reducing the volume of radioactive contaminated soil since biotite has been suggested to fix Cs strongly by theory and experiment. Recently, elimination of Cs accompanied by crystal growth of pyroxene, wadalite, FeO
and CaCO by heating with mixed alkali-salt (NaCl-CaCl) was observed. In order to make them available as functional material, selective growth is required. In this study, selective growth of wadalite from biotite and suppression of pyroxene were observed when alkali salt with ratio of NaCl:CaCl=3:7 was utilized. This observation indicates that NaCl:CaCl ratio possibly affects selective growth of silicate mineral from biotite.