Solvent extraction of selenium in nitric acid: evaluation of multiple extractants and proposal of a novel separation process

被引：1

作者：

Ito, K. T. M. ^{[1
,2
]}

Kawakami, T. ^{[1
]}

Kato, C. ^{[1
]}

Fukutani, S. ^{[3
]}

Matsumura, T. ^{[4
]}

Fujii, T. ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn, Div Sustainable Energy & Environm Engn, Suita, Osaka 5650871, Japan

[2] Univ Tokyo, Geochem Res Ctr, Hongo 7-3-1, Tokyo 1130033, Japan

[3] Kyoto Univ, Inst Integrated Radiat & Nucl Sci, 2-1010 Asashiro Nishi, Sennan, Osaka 5900494, Japan

[4] Japan Atom Energy Agcy, Nucl Sci Res Inst, Shirakata 2-4, Tokai, Ibaraki 3191195, Japan

来源：

JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2024年 / 333卷 / 10期

关键词：

Selenium-79; Selenium; Solvent extraction; Nitric acid; Octanol; o-Phenylenediamine; SE(VI);

D O I：

10.1007/s10967-024-09681-6

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Solvent extraction behaviors of Se (VI) from nitric acid solutions were investigated with multiple extractants used for uranium, plutonium, minor actinides, and rare earth elements separation processes from high-level liquid waste. During the processes, Se remained in the residual aqueous solutions, as all extractants showed distribution ratios < 1. In contrast, Se showed distribution ratios > 1 with o-phenylenediamine in dilute nitric acid (< 2 M HNO3), octanol as the organic phase, and concentrated nitric acid (8 M HNO3) for back extraction, suggesting a potential new single separation process and recovery of Se.

引用

页码：5183 / 5189

页数：7

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