Extraction of Gold(III) from Hydrochloric Acid Solutions with a PVC-based Polymer Inclusion Membrane (PIM) Containing Cyphos(®) IL 104.
Extraction of Gold(III) from Hydrochloric Acid Solutions with a PVC-based Polymer Inclusion Membrane (PIM) Containing Cyphos(®) IL 104.
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用含有Cyphos（®）IL 104的基于PVC的聚合物包含膜（PIM）从盐酸溶液中提取黄金（III）。
DOI：
10.3390/membranes5040903
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发表时间：
2015-12-08
期刊：
影响因子：
4.2
通讯作者：
Kolev SD
中科院分区：
文献类型：
--
作者：
Bonggotgetsakul YY;Cattrall RW;Kolev SD
摘要：研究了具有不同浓度Cyphos® IL 104作为膜萃取剂/载体的基于聚氯乙烯（PVC）的聚合物包合膜（PIM）从盐酸溶液中萃取Au（III）的能力。一些PIM还含有以下增塑剂或改性剂之一：2-硝基苯辛基醚、邻苯二甲酸二辛酯、1-十二烷醇、1-十四烷醇或磷酸三（2-乙基己基）酯。在提取率和提取的Au（III）的量方面，由25重量% Cyphos® IL 104、5重量% 1-十二烷醇和70重量% PVC组成的PIM表现出最佳性能。通过使用pH 8的0.10 mol L−1 Na 2SO 3接收溶液，实现了从该膜萃取的Au（III）的几乎完全的反萃取。萃取的Au（III）/Cyphos® IL 104加合物的化学计量测定为[P]+ [AuCl 4]− H+ [PO 2]−，其中[P]+和[PO 2]−分别表示三己基（十四烷基）磷和双（2，4，4-三甲基戊基）次膦酸根离子。Au（III）的反萃取被认为是通过将Au（III）还原为Au（I）而发生的，并在接收水溶液中形成[Au（SO 3）2]3−。观察到1-十二烷醇从新开发的PIM损失到与其接触的水溶液中，这表明该膜适合于从电子废料或回收珠宝的盐酸溶液中有效回收Au（III）。
Abstract: Poly(vinyl chloride) (PVC) based polymer inclusion membranes (PIMs), with different concentrations of Cyphos® IL 104 as the membrane extractant/carrier, were studied for their ability to extract Au(III) from hydrochloric acid solutions. Some of the PIMs also contained one of the following plasticizers or modifiers: 2-nitrophenyloctyl ether, dioctylphthalate, 1-dodecanol, 1-tetradecanol, or tri(2-ethylhexyl) phosphate. The best performance, in terms of extraction rate and amount of Au(III) extracted, was exhibited by a PIM consisting of 25 wt% Cyphos® IL 104, 5 wt% 1-dodecanol, and 70 wt% PVC. An almost complete back-extraction of the Au(III) extracted from this membrane was achieved by using a 0.10 mol L−1 Na2SO3 receiver solution at pH 8. The stoichiometry of the extracted Au(III)/Cyphos® IL 104 adduct was determined as [P]+ [AuCl4]− H+ [PO2]− where [P]+ and [PO2]− represent trihexyl(tetradecyl) phosphonium and bis(2,4,4-trimethylpentyl) phosphinate ions, respectively. Back-extraction of Au(III) is suggested to occur by reduction of Au(III) to Au(I), with the formation of the species [Au(SO3)2]3− in the aqueous receiver solution. Loss of 1-dodecanol from the newly developed PIM to the aqueous solutions in contact with it was observed, which indicated that this membrane was suitable for single use in the efficient recovery of Au(III) from hydrochloric acid solutions of electronic scrap or recycled jewelry.