Extraction Mechanism of Lanthanide Ions into Silica-based Microparticles Studied by Single Microparticle Manipulation and Microspectroscopy
-
- OTAKA Toshiki
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba
-
- SATO Tatsumi
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba
-
- ONO Simpei
- Shibaura Institute of Technology
-
- NAGOSHI Kohei
- Shibaura Institute of Technology
-
- ABE Ryoji
- Shibaura Institute of Technology
-
- ARAI Tsuyoshi
- Shibaura Institute of Technology
-
- WATANABE Sou
- Japan Atomic Energy Agency
-
- SANO Yuichi
- Japan Atomic Energy Agency
-
- TAKEUCHI Masayuki
- Japan Atomic Energy Agency
-
- NAKATANI Kiyoharu
- Division of Chemistry, Faculty of Pure and Applied Sciences, University of Tsukuba
Search this article
Abstract
<p>Single porous silica microparticles coated with a styrene-divinylbenzene polymer (SDB) impregnated with octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) were injected into an aqueous 3 mol/L nitric acid solution containing trivalent lanthanide (Ln(III)), as a high-level liquid waste model. We used the microcapillary manipulation-injection technique; and the extraction rate of Ln(III), as an Ln(III)-CMPO complex, into the single microparticles was measured by luminescence microspectroscopy. The extraction rate significantly depended on the Ln(III), CMPO, or NO3− concentration, and was analyzed in terms of diffusion in the pores of the microparticles and the complex formation of Ln(III). The results indicated that the rate-determining step in Ln(III) extraction was diffusion in the pore solution of the microparticles.</p>
Journal
-
- Analytical Sciences
-
Analytical Sciences 35 (10), 1129-1133, 2019-10-10
The Japan Society for Analytical Chemistry
