Extraction of Pt(IV), Pt(II), and Pd(II) from Acidic Chloride Media Using Imidazolium-Based Task-Specific Polymeric Ionic Liquid
Extraction of Pt(IV), Pt(II), and Pd(II) from Acidic Chloride Media Using Imidazolium-Based Task-Specific Polymeric Ionic Liquid
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使用咪唑基特定任务聚合离子液体从酸性氯化物介质中萃取 Pt(IV)、Pt(II) 和 Pd(II)
DOI：
10.1021/acs.iecr.8b03408
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发表时间：
2019
影响因子：
4.2
通讯作者：
Ying Yang
中科院分区：
文献类型：
--
作者：
Zixuan Xu;Yonglu Zhao;Peiyu Wang;Xinqi Yan;Miaomiao Cai;Ying Yang
合成了咪唑类功能化聚合物离子液体（CP-AMIN），并利用SEM和FT-IR对其进行了表征，探讨了温度、pH、反应时间、CP-AMIN用量和氯离子浓度对萃取铂族金属过程的影响。CP-AMIN在各种条件下均表现出较高的提取效率，表明CP-AMIN具有较强的环境适应性。CP-AMIN还在共存金属离子（Ni 2+、Mn 2+、Cu 2+、Cd 2+、Co 2+和Cr 3+）的溶液中对铂族金属具有优异的选择性，并且这表明CP-AMIN过程有效的任务特异性。值得注意的是，酸性硫脲可以从CP-AMIN中几乎完全解吸PGM。经过7次吸附-脱附实验，萃取率仍保持在85%以上。这表明CP-AMIN也表现出优异的可再循环性。同时，由于其易于处理，安全，环境友好，任务特定的聚合物离子液体有望从水相中回收铂族金属的巨大潜力。
As an excellent separation material to recover platinum group metals (PGMs), imidazolium-based task-specific polymeric ionic liquid (CP-AMIN) was successfully synthesized and characterized by SEM and FT-IR. The effects of temperature, pH, reaction time, CP-AMIN amount, and concentration of chloride ion were discussed during the process of extraction of Pt(IV), Pt(II), and Pd(II) from acidic chloride media. It shows high extraction efficiency under various conditions, suggesting CP-AMIN has strong adaptability of environment. CP-AMIN also presents excellent selectivity for PGMs in the solutions with coexisting metal ions (Ni2+, Mn2+, Cu2+, Cd2+, Co2+, and Cr3+), and it indicates the CP-AMIN process efficient task specificity. Notably, the acidic thiourea can desorb PGMs from CP-AMIN almost completely. After seven cycles of adsorption–desorption experiments, the extraction efficiencies still maintain above 85%. This suggests that CP-AMIN also exhibits excellent recyclability. Meanwhile, due to its being easy to handle, safe, and environmentally friendly, the task-specific polymeric ionic liquid promises great potential to recover PGMs from aqueous phase.