Ionic liquid modified silica gel for the sorption of americium(III) and europium(III) from dilute nitric acid medium

Imidazolium-Modified Silica Gel for Highly Selective Preconcentration of Ag(I) from the Nitric Acid Medium

“…In the literature, there is only one example of the selective separation of Am(III)/Eu(III) on 1-methyl-3-(3-(triethoxysilyl)propyl)-1H-imidazol-3-ium bis(2-ethylhexyl)phosphate-modified silica gel. It is assumed that the separation relies on sequential proceeding of the ion exchange and formation of poorly soluble Am(III) and Eu(III) phosphates [53]; the selectivity of their separation is controlled by the stability constant of compounds that was formed.…”

Overview on Hydrometallurgical Recovery of Rare-Earth Metals from Red Mud

“…However, hydrometallurgy provides a number of benefits, including cheaper capital costs, flexibility in handling difficult secondary resources, diverse by-product recovery, relatively low energy consumption, and the ability to process closely related wastes and even extremely lowgrade materials. For the separation, purification, and concentration of the metals, a variety of hydrometallurgical processes, including precipitation, cementation, solvent extraction, adsorption, and ion exchange are available [59,81]. These methods have several drawbacks compared to heterogeneous reactions (such as longer operating times), and in most instances, the goal is to remove metals rather than recover them [54,72].…”

Hexafluorophosphate ionic liquid-modified silica sorbent for selective separation and preconcentration of Pb2+, Cd2+, and Cr3+ in water samples

“…39 In the last decade, the ILs supported onto silica gel used as efficient sorbents in SPE have been studied intensively. [40][41][42][43][44][45][46][47][48][49][50][51][52] In 2010, Liang and co-workers prepared 1-butyl-3methylimidazolium hexauorophosphate-modied silica via physical modication and applied it for the determination of trace amount of Cd 2+ in water samples with adequate outcomes. 53 1-Methyl-3-butyl-imidazolium bromide ionic liquid was a moiety physically attached to silica gel by Ayata and co-workers.…”

“…39 In the last decade, the ILs supported onto silica gel used as efficient sorbents in SPE have been studied intensively. 40–52…”