标题：Gold Extraction through Vesicles Self-Assembled by Cationic Gemini Surfactant and Sodium Deoxycholate
作者：Wang, Shubin; Yin, Xiaolu; Yan, Yan; Xiang, Zeyang; Liu, Peng; Chen, Yao; Xin, Xia; Yang, Yanzhao
作者机构：[Wang, Shubin; Yin, Xiaolu; Yan, Yan; Xiang, Zeyang; Liu, Peng; Chen, Yao; Yang, Yanzhao] Shandong Univ, Sch Chem & Chem Engn, Educ Minist, Key Lab Sp 更多
会议名称：13th International Conference on Carbon Dioxide Utilization (ICCDU)
会议日期：JUL 05-09, 2015
来源：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
摘要：A kind of self-assembled vesicles that composed of ionic liquid-type cationic gemini surfactant (C3H6-alpha, omega-(Me2N+C12H25Cl-)(2), 12-3-12) and anionic biological surfactant (sodium deoxycholate, SDC) were constructed for Au(III) extraction. The appearance and microstructure of vesicles system were characterized by visual and TEM images. Compared to the zeta potential of pure vesicles system (+45 +/- 1 mV), zeta potential of gold-loaded vesicles system reduced 15 +/- 1 my (changed to +30 +/- 1 mV), which confirmed the mechanism of Au(III) was effectively extracted by vesicles through electrostatic interaction. The main influence factors including extraction equilibrium time, surfactants concentration, NaCl concentration, and pH on the extraction efficiency (E%) were explored. Furthermore, an effective method was devoted for gold(III) stripping. Through stepwise extraction and ligand-modified vesicles system, Au(III), Cu(II), and Fe(III) were separated from a mixed solution successfully. In short, an effective and potential approach for the separation of Au(III) from HCl solution was investigated in our work, which can be helpful for gold recovery and environmental improvement.