用微胶囊萃取铀

Extraction of Uranyl Ions with Polyurea Microcapsules

用微胶囊萃取铀倪沛红张明祖陈漫里严年喜（苏州大学化学化工学院，苏州２１５００６）关键词微胶囊萃取铀界面缩聚平均粒径１前言铀作为核燃料之一具有重要的应用价值。有关铀的提取方法已经研究得很多，主要是采用溶剂萃取的方法。八十年代以来，有关液膜法萃取铀的研究...

Separation of metal ions with the microcapsules has some advantages over other methods, since the microcapsules can have desired properties, such as the size and its distribution, membrane thickness, and surface properties, by adjusting process variables and materials used. The extraction of uranyl ions from aqueous solutions has been studied using polyurea microcapsules. Experimental results showed that extraction rate increased with a decrease of the microcapsules diameter and pH in the feed solution containing uranyl ions, but increased with an increase of tributyl phosphate (TBP) concentration in the microcapsules. The salting out agent NaNO 3 was essential for the extracting process. When TBP and 8 hydroxyquinoline (HOx) were used as the co extractants encapsulated with the microcapsules, the extraction rate for uranyl ions was much faster than that of the microcapsules solely containing TBP.