Gold(III) Transport through Polymer Inclusion Membranes: Efficiency Factors and Pertraction Mechanism Using Kelex 100 as Carrier

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• 作者：Eduardo Rodr&iacute ; guez de San Miguel ; Anel V. Garduñ ; o-Garc&iacute ; a ; Julio C. Aguilar ; Josefina de Gyves
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2007
• 出版时间：April 25, 2007
• 年：2007
• 卷：46
• 期：9
• 页码：2861 - 2869
• 全文大小：235K
• 年卷期：v.46,no.9(April 25, 2007)
• ISSN：1520-5045

文摘

The transport of Au(III) acid across polymer inclusion membranes (PIM) from concentrated hydrochloricmedia using Kelex 100 (7-(4-ethyl-1-methyloctyl)-8-hydroxyquinoline) as carrier and 2-nitrophenyloctyletheras plasticizer is studied. The experimental conditions employed (feed HCl concentration, nature andconcentration of stripping reagents, and membrane composition) were optimized for the quantitative recoveryof the metal, and a quantitative evaluation of the efficiency factors of the separation system (permeability,selectivity, and stability) is performed. The membrane extraction equilibrium reaction and its correspondingextraction equilibrium constant were determined as well. Percolation theory was applied for modeling thesystem because a threshold concentration value in the transport profiles was observed. In addition, a Teasgraph based on Hansen tri-dimensional solubility parameters was used to account for component interactionswithin the membrane while transmission infrared mapping microspectroscopy was employed to verifypredictions obtained from the theoretical schemes.