Development of heavy element chemistry at interfaces; Observing actinide complexes at the oil/water interface in solvent extraction by nonlinear vibrational spectroscopy

Kusaka, Ryoji; Watanabe, Masayuki

Journal of Physical Chemistry Letters (Internet), 13(30), p.7065 - 7071, 2022/08

https://doi.org/10.1021/acs.jpclett.2c01550

Improvement in flow-sheet of extraction chromatography for trivalent minor actinides recovery

Watanabe, So; Senzaki, Tatsuya; Shibata, Atsuhiro; Nomura, Kazunori; Takeuchi, Masayuki; Nakatani, Kiyoharu*; Matsuura, Haruaki*; Horiuchi, Yusuke*; Arai, Tsuyoshi*

Journal of Radioanalytical and Nuclear Chemistry, 322(3), p.1273 - 1277, 2019/12

https://doi.org/10.1007/s10967-019-06808-y

Preparation of an extractant-impregnated porous membrane for the high-speed separation of a metal ion

Asai, Shiho; Watanabe, Kazuo; Sugo, Takanobu*; Saito, Kyoichi*

Journal of Chromatography A, 1094(1-2), p.158 - 164, 2005/11

https://doi.org/10.1016/j.chroma.2005.07.095

The analysis of radioactive species in radioactive wastes is essential to the safe and economical disposal of such wastes. Among radioactive species, alpha- and beta-emitting nuclides should be purified prior to various radiometric determinations. To overcome the disadvantages of the conventional separation techniques, we have proposed functional porous hollow-fiber membranes that achieve a high speed operation assisted by convective flow. Stable immobilization in aqueous media is ensured by the hydrophobic interaction between the hydrophobic moiety of the extractant and octadecyl part of octadecylamino group. In this study, HDEHP, which shows the selectivity for rare earth elements, such as yttrium, was immobilized onto the porous membrane. The amount of immobilized HDEHP increased with increasing molar conversion. This can be explained by the fact that an increase in the CNH group allows the polymer brush to extend itself due to electrostatic repulsion originating from the amino part of the CNH group.

Production of Ce by the La(p,n)Ce reaction

Ishioka, Noriko; Izumo, Mishiroku; Hashimoto, Kazuyuki; Kobayashi, Katsutoshi; Matsuoka, Hiromitsu; Sekine, Toshiaki

JAERI-Tech 2001-095, 23 Pages, 2002/01

JAERI-Tech-2001-095.pdf:1.1MB

no abstracts in English

Development of partitioning process; Back-extraction of actinoid and lanthanoid with hydrazine carbonate

Watanabe, Masayuki; Tatsugae, Ryozo*; *; Morita, Yasuji; Kubota, Masumitsu

JAERI-Research 99-034, 55 Pages, 1999/05

JAERI-Research-99-034.pdf:1.7MB

no abstracts in English

Characteristics of centrifugal partition chromatography for lanthanoid separation in HDEHP extraction system

Abe, Hitoshi; Usuda, Shigekazu; Tachimori, Shoichi

J. Liquid Chromatogr., 17(8), p.1821 - 1835, 1994/00

no abstracts in English

Separation of plutonium-238 from fission products by solvent extraction using HDEHP

Journal of Nuclear Science and Technology, 10(11), p.696 - 699, 1973/11

https://doi.org/10.3327/jnst.10.696

no abstracts in English

Basic study on new separation technology of Mo (VI) and Zr (IV) using oil adsorption sheet

Abe, Ryoji*; Arai, Tsuyoshi*; Watanabe, So; Sano, Yuichi; Takeuchi, Masayuki

no journal, , 

no abstracts in English

Optimization in flow-sheet of extraction chromatography with CMPO and HDEHP impregnated adsorbents

Watanabe, So; Senzaki, Tatsuya; Shibata, Atsuhiro; Nomura, Kazunori; Nakatani, Kiyoharu*; Horiuchi, Yusuke*; Arai, Tsuyoshi*; Matsuura, Haruaki*

no journal, , 

no abstracts in English

Optimization of chromatography method for an advancement of trace analysis of Sm

Yoshida, Masaaki*; Arai, Tsuyoshi*; Matsushima, Ryotatsu; Saito, Yasuo

no journal, , 

no abstracts in English