本實驗以混合式離子液體同步萃取水中甲苯及二價銅離子。針對所欲萃取的物種，在找出最適合的離子液體之後，以混合的方式進行同步萃取，並探討混合比對萃取效率的影響。實驗結果顯示[HMIM][PF6]¬¬(1-Hexyl-3-methyl-imidazolium hexafluorophosphate)對於非極性有機物有良好萃取濃縮效果，但對極性化合物的效果則未盡理想；而Cu2+的萃取方面，以任務性導向的離子液體（TSILs，Task Specific Ionic Liquid）為萃取相，利用附加在離子液體陽離子烷基上的官能基抓取Cu2+，發現含thio-urea結構的離子液體對於Cu2+的萃取效果為最佳。此外，採取混合式離子液體的方式確實可以有效地同步萃取水中的toluene及Cu2+ ，在pH為中性、萃取溫度25℃、萃取時間20分鐘、混合比0.4之條件下，甲苯和二價銅離子的回收效率分別可以達到88%及100％。然而，在反萃取效率方面，利用酸洗的方式無法有效將二價銅離子從離子液體中脫除，超過10％的硝酸水溶液會造成離子液體的水解。未來的研究需要找尋更佳的反萃取方式，來解決二價銅離子不易從離子液體中反萃取出的問題，例如以超臨界流體進行反萃取。

This study was aimed at the application of mixed ionic liquids (MIL, mixed ionic liquid) on the extraction of toluene and Cu2+ from aqueous media simultaneously. Studies of extraction efficiency were performed by using some selected ionic liquids (ILs) under different conditions. Cu2+ and toluene were extracted respectively with TSILs（task specific ionic liquids）having thio-urea functional group and [HMIM][PF6] (1-methyl-3-hexyl-imidazolium hexaflurophosphate). The results show that mixed IL has good extraction efficiency. The functions of ILs are distinct and interference between ILs are negligible. At the optimum conditions (pH: 7,extraction time and temperature: 20 mins, 25℃, mixed ratio of TSIL/RIL:0.4), the recovery efficiency of toluene is 88% and the extraction efficiency of Cu2+ is 100%. However, a change in aqueous –phase pH doesn’t promote the stripping of metal from mixed ionic liquid. Extreme condition (high acid and temperature) may decompose the functional group of TSIL.In future, other investigations are necessary to solve this problem.

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