Application of an organic–inorganic hybrid membrane for selective gold(III) permeation

Miguel, Eduardo Rodríguez de San; Garduño-García, Anel V.; Núñez-Gaytán, María Elena; Aguilar, Julio César; Gyves, Josefina de

doi:10.1016/j.memsci.2007.02.031

Cited by 11 publications

(2 citation statements)

References 37 publications

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“…The leachates are generally containing low concentrations of precious metals their recovery and separation from base metals is then an economical challenge . Several processes can be used including solvent extraction, electrochemical deposition and membranes processes . However, these processes are generally poorly competitive for low‐concentration effluents and ion‐exchange and chelating resins or biosorbents may be more competitive.…”

Section: Introductionmentioning

confidence: 99%

Amberlite XAD Resins Impregnated with Ionic Liquids for Au(III) Recovery

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Lira

Saucedo

et al. 2017

Macromolecular Symposia

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Phosphonium‐based ionic liquids have been successfully impregnated on several Amberlite XAD resins for recovering Au(III) chloro‐anions. Sorption performance was evaluated through sorption isotherms (very favorable profiles) and uptake kinetics (controlled by the resistance to intraparticle diffusion). The binding mechanism consists of an ion‐exchange between AuCl4− and the counter ion bound to the phosphonium cation. Increasing the IL loading proportionally increases the sorption capacity but decreases the sorption speed (by increasing the resistance to intraparticle diffusion). Changing the counter ion on the phosphonium cation (i.e., complex anion vs. chloride ion) does not improve sorption performance. Highly porous resin (high pore volume and large pore size), such as Amberlite XAD‐1180, shows the best diffusion performance and highest sorption velocity (lower equilibrium time).

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Section: Introductionmentioning

confidence: 99%

Amberlite XAD Resins Impregnated with Ionic Liquids for Au(III) Recovery

Navarro

Lira

Saucedo

et al. 2017

Macromolecular Symposia

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“…Solvent extraction is frequently used because of its high selectivity for target metals . The extractant can be used directly dissolved in the organic phase (liquid–liquid extraction) or impregnated on a polymeric support such as membranes (SLM, supported liquid membrane) or resins: liquid‐liquid extraction is frequently preferred for the treatment of concentrated solutions while supported systems are more competitive for dilute solutions. Recently, several processes have been described for the encapsulation of extractants by incorporation in porous polymer matrix or by encapsulation in biopolymer beads .…”

Section: Introductionmentioning

confidence: 99%

Encapsulation of Cyanex 302 with Alginate for Palladium Recovery

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Saucedo

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et al. 2017

Macromolecular Symposia

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A new generation of extractant impregnated resin has been elaborated by encapsulation of extractants in biopolymer capsules. The extractant forms the core of the spherical particle, while the biopolymer entraps the extractant in a shell. The immobilization can reduce the loss of extractant. Cyanex 302 (bis(2,4,4‐trimethylpentyl)monothiophosphinic acid) was efficiently immobilized into alginate capsules prepared by ionotropic gelation in CaCl2 solutions. The influence of a series of parameters on microcapsule preparation was investigated. Selected materials were tested for Pd(II) recovery from HCl solutions through the study of sorption isotherms and uptake kinetics.

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