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Article

Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling

National Center for Metallurgical Research (CENIM), Spanish National Research Council (CSIC), Avenida Gregorio del Amo 8, 28040 Madrid, Spain
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Author to whom correspondence should be addressed.
Membranes 2020, 10(12), 432; https://doi.org/10.3390/membranes10120432
Received: 12 November 2020 / Revised: 11 December 2020 / Accepted: 14 December 2020 / Published: 17 December 2020
(This article belongs to the Special Issue Advances in Supported Liquid Membranes)
By the use of the tertiary amine A327 and 1 M HCl solution as precursors, the ionic liquid A327H+Cl was generated and used to investigate its performance in the transport of Au(III) from hydrochloric acid medium. The influence of the stirring speed (600–1800 min−1), ionic liquid concentration (1.25–50% v/v) in the membrane phase, and gold concentration (0.01–0.15 g/L) in the feed phase on metal transport have been investigated. An equation which included both equilibrium and kinetics parameters was derived, and the membrane diffusional resistance (Δm) and feed phase diffusional resistance (Δf) was estimated as 9.5 × 106 s/cm and 307 s/cm, respectively. At carrier concentrations in the 5–50% v/v range and gold concentrations in the 0.01–0.15 g/L range, metal transport is controlled by diffusion of metal species through the feed boundary layer, whereas at the lowest carrier concentrations, membrane diffusion is predominant. From the receiving solutions, gold can be recovered as gold nanoparticles. View Full-Text
Keywords: membrane transport; A327H+Cl ionic liquid; gold; hydrochloric acid; nanoparticles membrane transport; A327H+Cl ionic liquid; gold; hydrochloric acid; nanoparticles
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MDPI and ACS Style

Alguacil, F.J.; Alcaraz, L.; Largo, O.R.; López, F.A. Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling. Membranes 2020, 10, 432. https://doi.org/10.3390/membranes10120432

AMA Style

Alguacil FJ, Alcaraz L, Largo OR, López FA. Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling. Membranes. 2020; 10(12):432. https://doi.org/10.3390/membranes10120432

Chicago/Turabian Style

Alguacil, Francisco J., Lorena Alcaraz, Olga R. Largo, and Félix A. López. 2020. "Transport of Au(III) from HCl Medium across a Liquid Membrane Using R3NH+Cl/Toluene Immobilized on a Microporous Hydrophobic Support: Optimization and Modelling" Membranes 10, no. 12: 432. https://doi.org/10.3390/membranes10120432

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