Solid-phase extraction gold from alkaline cyanide solution with quaternary ammonium surfactant

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• 作者：Run-Fang Xie ; Qiu-Fen Hu ; Guang-Yu Yang ; Jing Chen ; Yun-Shan Han…
• 关键词：Solid ; phase extraction ; Surfactant ; Alkaline cyanide solution ; Gold ; Mechanism
• 刊名：Rare Metals
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：35
• 期：3
• 页码：282-288
• 全文大小：556 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1867-7185

文摘

The solid-phase extraction (SPE) technique applied to the extraction of organic compound was creatively used as the extraction of inorganic gold in the paper. Two types of techniques were proposed and explored, namely the SPE and the liquid–liquid extraction (LLE) of the quaternary ammonium surfactant [cetytrimethyl ammonium bromide (CTMAB), cetyl pyridine bromide (CPB), benzyl dimethyl dodecyl ammonium chloride (BDMDAC), and dodecyl trimethyl ammonium chloride (DTMAC)]. The surfactant could react with Au(CN) ₂ − to form the ionic complex, and the compound could be extracted by SPE column of reversed-phase bonded silica gel. Hence, a new method of SPE was proposed to extract gold with these features of the high selectivity, the reliability, and the simplicity. The experimental result shows that the recovery rate of gold is more than 98 %, and the solid-phase extraction column is not easily damaged and it can be repeatedly used. The new method can be used as the extraction process of gold from alkaline cyanide solution as well. Besides, the paper also puts forward a new process of gold extraction.