Preparation and application of supported ionic liquid phases for sorption of Pt(IV) from chloride solution

Bui, Thuy Thi Le; Uong, Ha Thi Ngoc; Pham, Ngoc C.; Nguyen, Duy K.; Ngo, Son; Nguyen, Binh T.

doi:10.1007/s11696-020-01328-6

Cited by 1 publication

(2 citation statements)

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“…In addition, there is a decrease in the amount of required IL, as compared to conventional liquid–liquid separation, and, consequently, a reduction in the material’s price. The use of sorbents based on IL modified silica-gel materials for the recovery of Pt and Pd species in solution has only been reported in a few studies. ,,− For instance, Lanaridi et al reported the recovery of platinum group metals from a spent automotive catalyst using phosphonium-based ionic liquids. The authors prepared the SIL via physisorption of the ionic liquid on the silica support, and therefore, this material has low stability in the liquid phase with the possibility of leaching.…”

Section: Introductionmentioning

confidence: 99%

“…The authors prepared the SIL via physisorption of the ionic liquid on the silica support, and therefore, this material has low stability in the liquid phase with the possibility of leaching. Similarly, Bui et al , prepared and applied solid supports impregnated with ammonium-, imidazolium-, and pyridinium-based ionic liquids for Pt(IV) recovery from chloride solutions. Konshina et al demonstrated the ion-exchange extraction of Pd(II) from chloride solutions using an imidazolium-based IL.…”

Section: Introductionmentioning

confidence: 99%

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Silica Supported Ionic Liquids for the Efficient and Selective Recovery of Platinum and Palladium from Aqueous Media

Almeida,

Neves,

Trindade

et al. 2023

ACS Sustainable Chem. Eng.

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Platinum (Pt) and palladium (Pd) are considered critical elements due to their scarcity and high demand for important technologies, namely, in automotive catalytic converters. Therefore, sustainable technologies that are able to selectively extract such metals from secondary sources are extremely important. This work focuses on the preparation and evaluation of silica gel modified with ionic liquids (ILs) as alternative materials to recover Pt(IV) and Pd(II) species from aqueous media. The approach described here offers a way to reduce the amount of ILs employed in common liquid−liquid extraction methods for these metal species. The sorption equilibrium data obtained are well described by a Dubinin−Radushkevich isotherm model, with the SIL containing 1-methyl-3-propylimidazolium chloride having maximum equilibrium concentrations of 51.0 mg/g and 22.3 mg/g SIL for Pt and Pd, respectively. The gathered results pave the way for the use of materials modified with ILs in the recycling of obsolete automotive catalytic converters.

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