中文摘要：

为提高支撑液膜在萃取过程中的迁移效率,本研究以聚偏氟乙烯微孔滤膜（PVDF）作为支撑体,以疏水性离子液体1-丁基-3-甲基咪唑六氟磷酸盐（[Bmim]PF6）为膜溶剂修饰膜材料,制备＂填充型＂离子液体支撑液膜（SILM）.利用该离子液体支撑液膜对黄金冶炼废水中氰化物进行萃取,通过考察氰根的迁移率及离子液体在支撑液膜内的损失率,对实验因素进行了优化,在较优条件下：膜浸渍时间3 h、解析液（Na OH）质量分数3%、萃取温度25℃、萃取时间1 h,氰的萃取率可达93.25%,离子液体支撑液膜的膜损失率为17.68%,并与传统的支撑液膜做了对比试验,表明SILM相对于传统支撑液膜具有较高的固容量和稳定性.文中也探讨了氰根在离子液体支撑液膜中的迁移机制,通过扫描电镜分析从微观上研究了离子液体支撑液膜的表面和断面形貌特征.实验证明,离子液体[Bmim]PF6是一种高效的膜溶剂,可明显提高支撑液膜迁移氰根过程中的稳定性,并有较好的萃取效果.

英文摘要：

In order to improve the migration efficiency of supported membrane in the extraction process,supported ionic liquid membrane（SILM） was prepared by using a hydrophobic ionic liquid1-butyl-3-methylimidazolium hexafluorophosphate（[Bmim ] PF6） as the membrane phase immobilized on a polyvinylidene fluoride microporous membrane（PVDF）. The selective separation of CN-from gold extraction wastewater was carried out by the prepared SILM. The influences of operation factors on the cyanide extraction rate,loss ratio and solid solubility of ionic liquid were investigated. The optimum conditions obtained were： membrane immersing time of 3 h,the desorbed solution（Na OH） mass fraction of 3%,extraction temperature of 25 ℃,extraction time of 1 h.Under the above operation factors,the cyanide extraction efficiency reached 93.25%,and loss rate of ionic liquids was 17. 68%. The transport mechanism involving SILM was elucidated.Characterization of SILM by SEM was also carried out. The operation stability of the SILM was tested and compared with traditional supported liquid membrane. The results showed that [Bmim]PF6wasan efficient membrane solvent,which can significantly improve the stability and extraction effect of supported liquid membrane during migration process.