Studies on membrane stability and recovery of uranium (VI) from aqueous solutions using a liquid emulsion membrane process
Studies on membrane stability and recovery of uranium (VI) from aqueous solutions using a liquid emulsion membrane process
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DOI：
10.1016/s0304-386x(02)00006-3
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发表时间：
2002-04-01
期刊：
影响因子：
4.7
通讯作者：
Ghosh, SK
中科院分区：
文献类型：
--
作者：
Kulkarni, PS;Mukhopadhyay, S;Ghosh, SK
本文介绍了用乳状液膜技术从稀水溶液中分离回收铀的广泛研究。这项研究强调了乳状液稳定性对最大限度地提高铀回收率的重要性。该乳液由作为载体的三正辛基氧化膦（TOPO）、作为有机稀释剂的石蜡、乳化剂和反萃取相组成。对铀充分渗透所需的停留时间进行了评价。影响LEM渗透过程的重要变量，如表面活性剂，萃取剂，内部汽提相的浓度，和搅拌速度的影响，含水进料相的pH值，和铁的存在下进行了系统的研究。利用适当的值，试图从合成工艺厂的流中回收铀。发现反萃相碳酸钠浓度为0.5M时铀的回收率最高。已经发现进料相pH值对于通过该技术回收铀是关键的。(C)出版社：Elsevier Science B.V.
An extensive study on separation and recovery of uranium (VI) from dilute aqueous solutions using a liquid emulsion membrane (LEM) technique is presented. The study has highlighted the importance of emulsion stability for maximizing uranium recovery. The emulsion constitutes tri-n-octylphosphine oxide (TOPO) as a carrier, paraffin as organic diluent, an emulsifying agent, and stripping phase. The residence time required for adequate pertraction of uranium has been evaluated. The important variables affecting the LEM permeation process such as the concentrations of surfactant, extractant, internal strip phase, and effect of speed of agitation, aqueous feed phase pH, and the presence of iron were systematically investigated. Using suitable values, an attempt was made to recover uranium from a synthetic process plant stream. It was found that strip phase sodium carbonate concentration of 0.5 M gives maximum recovery of uranium. The feed phase pH has been found to be critical for uranium recovery by this technique. (C) 2002 Published by Elsevier Science B.V.