Selective and efficient liquid membrane transport of gold as gold cyanide using an anion carrier |
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| Affiliation: | 1. Department of Food Science, University of Guelph, Guelph, Ontario, Canada;2. School of Engineering, University of Guelph, Guelph, Ontario, Canada;3. Department of Engineering, University of Waterloo, Waterloo, Ontario, Canada;1. College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan 411104, PR China;2. Key Laboratory of Environmentally Friendly Chemistry and Applications, Ministry of Education, School of Chemistry, Xiangtan University, Xiangtan 411105, PR China;1. School of Earth Science and Mineral Resources, China University of Geosciences, Beijing 100083, China;2. Fluids Research Laboratory, Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, USA;3. MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;4. College of Earth Sciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China;1. Department of Aquatic Ecology, Eawag, Dübendorf, Switzerland;2. Université des Sciences et Techniques de Franche-Comté, Besançon, France;3. Department of Experimental Limnology, Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Stechlin, Germany;4. Department of Environmental Science, ETH, Zurich, Switzerland;5. Department of Ecology, Berlin Institute of Technology (TU Berlin), Berlin, Germany;1. School of Mechanical Engineering, Sathybama University, Chennai, India;2. Department of Mechanical Engineering, Dire Dawa University, Ethiopia;3. Department of Mechanical Engineering, Sri Sairam Institute of Technology, Chennai, India |
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| Abstract: | The facilitated transport of Au(III) from cyanide solutions through a bulk liquid membrane is reported. The organic phase consisted of a chloroform solution containing Victoria blue dye as the Au(CN)−4 carrier. The effects of pH of source phase, potassium cyanide concentration in source phase, Victoria blue concentration in the organic phase and sodium hydroxide in the receiving phase on the efficiency of transport process were examined. Under optimum conditions the extent of Au(CN)−4 transport across the liquid membrane was about 97% after 180 min. The carrier can selectively and efficiently transport Au(CN)−4 ion from the aqueous solutions containing other cations such as alkali and alkaline earth, Zn2+, Pb2+, Cu2+, Cd2+, Hg2+, Ag+, Co2+, Fe2+, Pt2+, Pd2+ and Ni2+. |
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