Development of highly efficient solvent extraction separation systems for metal ions utilizing the characteristics of ionic liquids

Okamura, Hiroyuki

Nihon Ion Kokan Gakkai-Shi, 35(1), p.1 - 8, 2024/01

https://doi.org/10.5182/jaie.35.1

Ionic liquids have unique properties that are quite different from conventional molecular liquids, and have therefore attracted much attention in various fields as novel functional media. When ionic liquids are used as extraction media in solvent extraction, they can also act as "liquid ion exchangers", and it is thus expected to exhibit superior extractability and separability compared with those in conventional organic solvent systems. The author has focused on these characteristics of ionic liquids, and have studied on the extraction separation of metal ions using ionic liquids as extraction media, with the aim of developing highly efficient solvent extraction systems. This article presents the evaluation of the solvent properties of ionic liquids in metal ion extraction, the separation of rare earth metals by the synergistic effect in ionic liquid systems, and the development of a macrocyclic extractant and the structure analysis of the metal complex extracted into the ionic liquid.

Influences of pore and particle sizes of CMPO/SiO-P adsorbent on extraction chromatography process

Watanabe, So; Sano, Yuichi; Sanda, Shuhei*; Sakurai, Shota*; Arai, Tsuyoshi*

Nihon Ion Kokan Gakkai-Shi, 30(1), p.8 - 16, 2019/01

https://doi.org/10.5182/jaie.30.8

Development of ion exchange ligands with high separation performance and colorimetric analysis using gold nanoparticles decorated with the functional ligands

Shimojo, Kojiro

Nihon Ion Kokan Gakkai-Shi, 28(1), p.1 - 10, 2017/01

https://doi.org/10.5182/jaie.28.1

Development of metal separating reagents with high selectivity is necessary for efficient separation and recovery of valuable metals contained in industrial wastes, and removal and detection of toxic metals. We have developed novel metal separating ligands with a diglycolamic acid (DGAA) framework. The ligands have a tridentate coordination structure consisting of an amide group and a carboxy group connected by an ether chain and provide a metal separation ability superior to that of commercial ligands. Since the ligands can be synthesized simply in one step, this helps to reduce the production costs of the ligands. In the present review article, we report the extraction characteristics of DGAA-type ligand for 56 kinds of metal ions, extraction separation of rare-earth metal ions, and removal of toxic metal ions. Furthermore, a one-pot biological approach to fabricate DGAA-decorated gold nanoparticles has been developed using the DGAA-type ligand fused to the N-terminus of a gold-binding peptide. It was found that the DGAA-decorated gold nanoparticles can act as a high-sensitive colorimetric sensor for detecting toxic metal ions with color change.

Development of an adsorbent for Cs removal synthesized by radiation-induced graft polymerization

Shibata, Takuya; Seko, Noriaki; Amada, Haruyo; Kasai, Noboru; Saiki, Seiichi; Hoshina, Hiroyuki; Ueki, Yuji

Nihon Ion Kokan Gakkai-Shi, 26(1), p.9 - 14, 2015/01

https://doi.org/10.5182/jaie.26.9

Evaluation of the scandium affinity under the iron coexistence using radiation grafted adsorbents

Hayashi, Natsuki*; Hoshina, Hiroyuki; Amada, Haruyo; Yamanobe, Takeshi*; Seko, Noriaki

Nihon Ion Kokan Gakkai-Shi, 25(4), p.105 - 108, 2014/11

https://doi.org/10.5182/jaie.25.105

Chromatographic separation of nuclear rare metals by highly functional xerogels

Onishi, Takashi; Koyama, Shinichi; Masud, R. S.*; Kawamura, Takuya*; Mimura, Hitoshi*; Niibori, Yuichi*

Nihon Ion Kokan Gakkai-Shi, 25(4), p.220 - 227, 2014/11

https://doi.org/10.5182/jaie.25.220

no abstracts in English

Cesium-adsorption behavior of weathered biotite from Fukushima Prefecture depends on the degree of vermiculitization

Yamada, Hirohisa*; Yokoyama, Shingo*; Watanabe, Yujiro*; Suzuki, Masaya*; Suzuki, Shinichi; Hatta, Tamao*

Nihon Ion Kokan Gakkai-Shi, 25(4), p.207 - 211, 2014/11

http://doi.org/10.5182/jaie.25.207

R&D for graft adsorbents by radiation processing

Seko, Noriaki; Tamada, Masao

Nihon Ion Kokan Gakkai-Shi, 23(2), p.51 - 58, 2012/05

https://doi.org/10.5182/jaie.23.51

no abstracts in English

Ionic liquid extraction systems utilizing ion recognition

Shimojo, Kojiro; Goto, Masahiro*

Nihon Ion Kokan Gakkai-Shi, 22(2), p.65 - 72, 2011/06

https://doi.org/10.5182/jaie.22.65

Ionic liquids have attracted much attention as the third liquid because they possess different properties from those of water and organic solvents. Their unique properties have encouraged us to develop liquid-liquid extraction systems using ionic liquids as extracting media. In this review, we describe metal ion and protein extractions in ionic liquid-water biphasic systems using the size recognition ability of macrocyclic compounds. Furthermore, we report the potential utility of ionic liquids as novel reaction media for biological catalysis with proteins extracted.

Adsorption of metals by adsorbent containing hydroxamic acid groups synthesized by radiation induced graft polymerization

Phiriyatorn, S.*; Hoshina, Hiroyuki; Seko, Noriaki; Tamada, Masao

Nihon Ion Kokan Gakkai-Shi, 21(3), p.157 - 160, 2010/09