Efficient extraction of gold(I) from alkaline aurocyanide solution using green ionic liquid-based aqueous biphasic systems
Efficient extraction of gold(I) from alkaline aurocyanide solution using green ionic liquid-based aqueous biphasic systems
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使用绿色离子液体基水性双相系统从碱性金氰化物溶液中高效萃取金 (I)
DOI：
10.1016/j.jtice.2018.06.018
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发表时间：
2018-10
影响因子：
5.7
通讯作者：
Wang shixiong
中科院分区：
文献类型：
--
作者：
Yang xiangjun;Miao changlin;Sun yan;Lei ting;Xie qiying;Wang shixiong
离子液体双水相萃取技术是一种环境友好的多种物质分离技术。本研究首次研究了1-烷基-3-甲基咪唑溴离子液体(ILS)(烷基=丁基、己基和辛基)与磷酸盐组成的双水相体系从碱性金氰化液中萃取金(I)。结果表明，金(I)优先迁移到富IL相，萃取率高达99.9%。用FT-IR、X-射线光电子能谱对萃取金(I)的机理进行了表征。结果表明，金(I)氰化物络合物与离子液体之间的静电相互作用是金(I)分配的主要驱动力。Au(I)向富IL相的迁移与[CNMIM+]·[Au(CN)2−]形成离子对的萃取机理有关。此外，还用透射电子显微镜测定了富含IL溶液的微观结构。结果表明，[Au(CN)2−]阴离子的存在诱导了离子液体的聚集。最后，通过在铜阴极上直接电沉积的方法，成功地回收了富IL相中的金。所提出的基于IL-ABSS的萃取策略有望成为从碱性金氰化液中绿色分配金(I)的潜在平台。
Ionic liquid-based aqueous biphasic extraction is an environmentally benign technology for separation of various substances. In this study, aqueous biphasic systems (ABSs) consisting of 1-alkyl-3-methylimidazolium bromide ionic liquids (ILs) (alkyl = butyl, hexyl, and octyl) and phosphate-based salts were studied for extraction of gold(I) from alkaline aurocyanide solutions for the first time. The results indicated that gold(I) preferentially migrated into the IL-rich phase, achieving remarkable extraction efficiency up to 99.9%. The extraction mechanism of gold(I) was evaluated based on characterization by FT-IR spectroscopy, X-ray photoelectron spectroscopy. The results revealed the electrostatic interaction between gold(I) cyanide complex and IL was the main driving force for gold(I) partition. The migration of gold(I) into IL-rich phase was associated with an extraction mechanism by ion pair formation of [Cnmim+]•[Au(CN)2−]. Furthermore, the microscopic structure of the IL-rich solution was also determined by transmission electron microscopy. It was found that the presence of [Au(CN)2−] anion induced the aggregation of ionic liquids. Finally, the gold present in IL-rich phase was successfully recovered by direct electrodeposition on a copper cathode. The proposed extraction strategy using IL-based ABSs is envisaged as potential platform for the green partition of gold(I) from alkaline aurocyanide solution.
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影响因子：
9.8
作者：
通讯作者：
--
DOI：
10.1016/j.jiec.2017.06.036
发表时间：
2017-10-25
影响因子：
6.1
作者：
Khosravi, Rasoul;Azizi, Asghar;Agarwal, Shilpi
通讯作者：
Agarwal, Shilpi
影响因子：
3.9
作者：
A. Warshawsky;N. Kahana;V. Kampel;I. Rogachev;R. M. Kautzmann;J. Cortina;C. Sampaio
通讯作者：
A. Warshawsky;N. Kahana;V. Kampel;I. Rogachev;R. M. Kautzmann;J. Cortina;C. Sampaio
不同温度下含有 1-烷基-3-甲基咪唑鎓四氟硼酸盐和酒石酸铵的水两相体系的平衡相行为：实验测定和相关性
DOI：
10.1021/je2006055
发表时间：
2011-09-01
期刊：
JOURNAL OF CHEMICAL AND ENGINEERING DATA
影响因子：
--
作者：
Han, Juan;Wang, Yun;Yan, Yongsheng
通讯作者：
Yan, Yongsheng
影响因子：
8.6
作者：
P. Patrício;R. D. D. Cunha-R.-D.-D.-Cunha-2092212953;S. Vargas;Y. Coelho;L. D. Silva;M. C. H. D. Silva
通讯作者：
P. Patrício;R. D. D. Cunha-R.-D.-D.-Cunha-2092212953;S. Vargas;Y. Coelho;L. D. Silva;M. C. H. D. Silva