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首页> 外文期刊>Separation and Purification Technology >Extraction and separation of metal ions by a column packed with polystyrene microcapsules containing Aliquat 336
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Extraction and separation of metal ions by a column packed with polystyrene microcapsules containing Aliquat 336

机译：用装有Aliquat 336的聚苯乙烯微胶囊填充的色谱柱提取和分离金属离子

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Since the 1990s,the use of microcapsules as a supporting material for a metal extractant has developed quickly.Although there are many microcapsule preparation methods that exist now,most are time- and energy-consuming.Economical and simple methods for the preparation of uniform extractant microcapsules are necessary for the development of microcapsule-extraction processes.In this paper,the preparation of polystyrene microcapsules containing Aliquat 336 using the solvent evaporation method as well as the separation of Cr(VI)/Cd(II) and Cr(VI)/Zn(II) using a column packed with these microcapsules were investigated.The results of the preparation showed that both the morphology and monodispersity of microcapsules are greatly related to the dispersion agent.The mean diameter of the obtained microcapsules was 45 to 90 mum with a narrow size distribution and was controlled by changing the agitation speed.The separation studies also showed that the pH value of the feed solution was important for successful separation of the metals with higher separation efficiency at lower pH levels.Both Cd(II) and Zn(II) were obtained from the aqueous effluent solution with high purity and Cr(VI) inside the microcapsules.Finally,the stability experiment showed that the microcapsules had a sufficient metal ions extraction capacity for reuse processing and extraction-stripping cycles indicated no decline in extractability.
机译：自1990年代以来，将微胶囊用作金属萃取剂的支持材料的发展迅速。尽管目前存在许多微胶囊的制备方法，但大多数方法既费时又耗能。制备均一萃取剂的经济且简单的方法微胶囊是发展微胶囊提取工艺所必需的。本文采用溶剂蒸发法制备了含Aliquat 336的聚苯乙烯微胶囊，并分离了Cr（VI）/ Cd（II）和Cr（VI）/用填充有这些微囊的柱子对Zn（II）进行了研究，制备结果表明微囊的形态和单分散性均与分散剂有很大关系，得到的微囊的平均直径为45-90μm。分离粒度研究表明，进料溶液的pH值很重要。为了在较低的pH值下成功分离出具有较高分离效率的金属，从微胶囊内部的高纯度废水溶液和Cr（VI）分别获得了Cd（II）和Zn（II）。最后，稳定性实验表明微胶囊具有足够的金属离子提取能力，可以重复使用，提取-汽提循环表明提取能力没有下降。

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