Abstract A poly(vinylidenefluoride- co -hexafluoropropylene) (PVDF-HFP)-based PIM containing trihexyltetradecylphosphonium chloride (Cyphos ® IL 101) as its carrier was developed for the selective extraction of V(V) from sulfate solutions. Various plasticizers/modifiers were tested and best results in terms of rate of extraction and amount extracted were obtained with 2-nitrophenyloctyl ether (NPOE). The optimal PIM composition, with respect to the same criteria was determined to be 35 wt% Cyphos ® IL 101, 55 wt% PVDF-HFP and 10 wt% NPOE. Back-extraction of V(V) was achieved using 6 mol L −1 H 2 SO 4 . An anion exchange mechanism is proposed for the extraction of V(V) involving the formation of the complex anion VO 2 SO 4 - . The selectivity of the PIM towards V(V) was tested in the presence of Mo(VI), Al(III), Co(II), Cu(II), Fe(III), Mn(II), and Ni(II). Only Mo(VI) was co-extracted with V(V) at pH 2.3. The Mo(VI) interference was eliminated by a two-step separation procedure in which Mo(VI) was extracted at pH 1.1 which was followed by the selective extraction of V(V) at pH 2.3. The PIM was found to be stable over five extraction/back-extraction cycles.

中文翻译：

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从硫酸盐溶液中选择性萃取钒 (V) 到由聚（偏二氟乙烯-共-六氟丙烯）和 Cyphos ® IL 101 组成的聚合物包合膜中

摘要 开发了一种含有三己基十四烷基氯化鏻 (Cyphos ® IL 101) 作为载体的聚偏氟乙烯-共六氟丙烯 (PVDF-HFP) 基 PIM，用于从硫酸盐溶液中选择性提取 V(V)。测试了各种增塑剂/改性剂，使用 2-硝基苯基辛基醚 (NPOE) 获得了在萃取率和萃取量方面的最佳结果。根据相同的标准，最佳 PIM 组成被确定为 35 wt% Cyphos® IL 101、55 wt% PVDF-HFP 和 10 wt% NPOE。V(V) 的反萃取使用6 mol L -1 H 2 SO 4 实现。提出了一种用于提取 V(V) 的阴离子交换机制，包括形成复合阴离子 VO 2 SO 4 - 。在存在 Mo(VI)、Al(III)、Co(II)、Cu(II)、Fe(III)、Mn(II)、和镍（II）。在 pH 2.3 时，只有 Mo(VI) 与 V(V) 共萃取。Mo(VI) 干扰通过两步分离程序消除，其中 Mo(VI) 在 pH 1.1 下萃取，然后在 pH 2.3 下选择性萃取 V(V)。发现 PIM 在五个提取/反提取循环中保持稳定。