Non-dispersive extraction separation of metals using hydrophilic microporous and cation exchange membranes |
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| Affiliation: | 1. College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China;2. Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou 225009, China;1. University of Natural Resources and Life Sciences Vienna, Department for Agrobiotechnology IFA-Tulln, Institute for Environmental Biotechnology, Konrad Lorenz Strasse 20, A-3430 Tulln an der Donau, Austria;2. Austrian Centre of Industrial Biotechnology, Konrad Lorenz Strasse 20, A-3430 Tulln an der Donau, Austria;3. Laboratory of Applied and Computational Biocatalysis, Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, Piazzale Europa 1, 34127, Trieste, Italy;1. Materials Science and Engineering, McMaster University, Hamilton, Canada;2. AGH-University of Science and Technology, Cracow, Poland;3. General Motors Global R&D Center, Warren, MI, USA |
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| Abstract: | Non-dispersive extraction of Zn(II) and Cu(II) from single and binary solutions across a flat-sheet membrane to an organic solution containing di(2-ethylhexyl)phosphoric acid (D2EHPA) was studied. Hydrophilic microporous and cation exchange membranes were used. Experiments were performed as a function of the pH (2–6), metal concentration (0.31–3.13 mol/m3), and D2EHPA concentration (50–500 mol/m3). It was shown that the presence of one metal retarded the transport of the other. Compared to the hydrophilic microporous membrane, the cation exchange membrane gave a low extraction rate of both metals in either single or binary systems, but gave a higher selectivity of Zn(II) over Cu(II) in binary systems at high D2EHPA concentrations. |
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