Abstract

The adsorption of molybdenum (Mo) ions on ionic liquid-loaded XAD-7 resin containing 1-butyl-3-methylimidazolium(2,4,6-trimethyl)benzodithioate from acidic feed solutions was investigated. The novel loaded resin could adsorb more than 99.0% Mo ions from nitric acid solutions at a concentration between 0.050 and 0.50 M; however, the adsorption percentage of U(VI), Cs(I), Ce(III), Zr(IV) and Ru(III) ions was very low. With the further increase in the concentration of nitric acid, the distribution coefficient (K_d) of Mo ions by the loaded resin decreased. The separation factor (SF_Mo/U) was about 5000 at 0.50 M nitric acid. X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and Raman spectroscopy results showed that Mo coordinated with sulfur, and part of Mo(VI) was reduced to Mo(IV). The results of column experiment indicated that about 94.7% Mo ions with a purity of over 99.0% was obtained by eluting with different concentrations of nitric acid.

Graphic abstract

中文翻译：

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钼离子在载有1-丁基-3-甲基咪唑鎓（2,4,6-三甲基）苯二硫醇的离子液体树脂上的选择性吸附

摘要

研究了钼 (Mo) 离子在离子液体负载的 XAD-7 树脂上的吸附，该树脂含有 1-丁基-3-甲基咪唑鎓（2,4,6-三甲基）苯二硫代酸从酸性进料溶液中吸附。新型负载树脂可从浓度为0.050-0.50 M的硝酸溶液中吸附99.0%以上的Mo离子；然而，U(VI)、Cs(I)、Ce(III)、Zr(IV) 和 Ru(III) 离子的吸附百分比非常低。随着硝酸浓度的进一步增加，负载树脂对Mo离子的分配系数（K _d）降低。分离因子（SF _Mo/U) 在 0.50 M 硝酸下约为 5000。X 射线光电子能谱、傅里叶变换红外光谱和拉曼光谱结果表明 Mo 与硫配位，部分 Mo(VI) 被还原为 Mo(IV)。柱实验结果表明，用不同浓度的硝酸洗脱，得到约94.7%纯度超过99.0%的Mo离子。

图形摘要