【摘要】 研究了以强疏水性的聚偏氟乙烯膜为支撑体,在不加添加剂时,铜萃取剂LIX984N为载体的金属离子Cu在两相循环流动条件下的传输行为。考察了循环流动方式、流速、液膜的反复使用、膜丝壁厚等因素对过程传质性能的影响,探讨了其传质机理。结果表明:在两相循环流动条件下,料液相流经中空纤维膜器管程时的传质效果较好,并流或逆流操作对Cu的传输效果影响不大;Cu的传输效果会随着管程流速的增大而增大,随着所用支撑体膜丝壁厚的增加而减小。基于有机相液膜与疏水性聚偏氟乙烯膜间的亲和作用,所形成液膜的稳定性好,可反复使用。更多还原

【Abstract】 The mechanism on transport of copper through supported liquid membrane in microporous hydrophobic polyvinylidene fluoride (PVDF) hollow fiber module is studied with LIX984N as carrier and without any addition agents. The effects of operation mode,recycling flowing mode,flow rate,reuse of the liquid membrane,thickness of fiber,et al. On the transport of supported liquid membrane process are investigated. The results show that the feed solution flows through the lumen side of hollow fiber module is favorable for the transport process,and there is almost no effect of flow mode of recycling operation on the transport performance,including parallel flow and countercurrent flow; the transport efficient increases with increasing flow rate of lumen side fluid and decreasing of fiber thickness used in the hollow fiber module; due to the affinity between organic liquid membrane phase and hydrophobic PVDF fiber,the supported liquid membrane is more stable and can be reused.更多还原