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On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids

1
Laboratory of Spectroscopy, Molecular Modeling, Materials, Nanomaterials, Water and Environment, Environmental Materials Team, ENSET, Mohammed V University in Rabat, Rabat E-8007, Morocco
2
Department of Chemical and Environmental Engineering, Regional Campus of International Excellence “Campus Mare Nostrum”, Technical University of Cartagena, Campus Muralla del Mar, E-30202 Cartagena, Spain
3
Department of Chemical Engineering, Regional Campus of International Excellence “Campus Mare Nostrum”, University of Murcia, Campus de Espinardo, E-30100 Murcia, Spain
*
Authors to whom correspondence should be addressed.
Processes 2019, 7(8), 544; https://doi.org/10.3390/pr7080544 (registering DOI)
Received: 25 June 2019 / Revised: 1 August 2019 / Accepted: 3 August 2019 / Published: 16 August 2019
(This article belongs to the Special Issue Green Sustainable Chemical Processes)
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Abstract

In the last few years, the use of ionic liquid-based membranes has gained importance in a wide variety of separation processes due to the unique properties of ionic liquids. The aim of this work is to analyze the transport of nutrients through polymer inclusion membranes based on different concentrations of methyltrioctylammonium chloride, in order to broaden the application range of these kinds of membranes. Calcium chloride (CaCl2) and sodium hydrogen phosphate (Na2HPO4) nutrients were used at the concentration of 1 g·L−1 in the feeding phase. The evolution of the concentration in the receiving phase over time (168 h) was monitored and the experimental data fitted to a diffusion-solution transport model. The results show very low permeation values for CaCl2. By contrast, in the case of Na2HPO4 the permeation values were higher and increase as the amount of ionic liquid in the membrane also increases. The surface of the membranes was characterized before and after being used in the separation process by scanning electron microscopy coupled to energy dispersive X-Ray spectroscopy (SEM–EDX) and elemental mapping analysis. The SEM–EDX images show that the polymer inclusion membranes studied are stable to aqueous solution contacting phases and therefore, they might be used for the selective transport of nutrients in separation processes. View Full-Text
Keywords: polymer inclusion membranes; ionic liquids; nutrients; liquid membrane stability; permeation polymer inclusion membranes; ionic liquids; nutrients; liquid membrane stability; permeation
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Baicha, Z.; Salar-García, M.; Ortiz-Martínez, V.; Hernández-Fernández, F.; de los Ríos, A.; Maqueda Marín, D.; Collado, J.; Tomás-Alonso, F.; El Mahi, M. On the Selective Transport of Nutrients through Polymer Inclusion Membranes Based on Ionic Liquids. Processes 2019, 7, 544.

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