Liquid–liquid extraction studies of UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{{2 + }} $$\end{document}, NpO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{NpO}}_{2}^{{2 + }} $$\end{document}, Pu(IV), Np(IV), and Pu(III) were carried out from nitric acidic feeds using N,N-di-n-hexyloctanamide (DHOA) in 1-butyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide (C4mim·NTf2). The distribution studies indicated strikingly different trends in the extraction of tetra- and hexa-valent actinide ions with varying nitric acid concentration. While the distribution ratio values for UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{{2 + }} $$\end{document} and NpO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ {\text{NpO}}_{2}^{{2 + }} $$\end{document} were found to decrease with increasing HNO3 concentration up to 1 mol·L−1 HNO3 and did not change thereafter, those obtained for Pu4+ and Np4+ showed monotonic increases over the entire range of acidity. On the other hand, Pu3+ was poorly extracted in the lower acidity range up to 4 mol·L−1, beyond which a sharp increase in the extraction was seen. The nature of the extracted species was obtained using several studies where the ligand and nitrate ion concentrations were varied while keeping the others constant using slope analysis.

中文翻译：

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在离子液体中使用 N, N-二正己基辛酰胺 (DHOA) 从硝酸原料中提取一些锕系离子

而 UO22+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} 的分配比率值\setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{UO}}_{2}^{{2 + }} $$\end{document} 和 NpO22+\documentclass[12pt]{最小} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{文档}$$ {\text{NpO}}_{2}^{{2 + }} $$\end{document} 被发现随着 HNO3 浓度增加到 1 mol·L−1 HNO3 而减少并且没有改变此后，Pu4+ 和 Np4+ 获得的结果在整个酸度范围内显示出单调增加。另一方面，在低至 4 mol·L-1 的较低酸度范围内，Pu3+ 的提取效果不佳，超过此范围，可以看到提取量急剧增加。提取物的性质是通过几项研究获得的，其中配体和硝酸根离子的浓度是变化的，而其他的则使用斜率分析保持不变。