Extraction of Pb(II) from water samples by ionic liquid-modified silica sorbents

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. 40–52…”

“…Saleem and co-workers reported extraction of Pb 2+ from water samples using ionic liquid-modified silica sorbents. 56 In their research, both 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide and 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl) imide were coated onto the surface of silica which was demonstrated to be a suitable stationary phase for the SPE process. In the same year, 1-(2-aminoethyl)-3-butylimidazolium hexafluorophosphate was prepared and modified onto silica gel by Shengping Wen 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][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.…”

N‐Doped Porous Carbon with Outstanding Pb2+ Adsorption Capacity in Wastewater

“…Currently, a variety of methods can be used to remove and recycle Pb 2+ in wastewater, including ion exchange [10], chemical precipitation, membrane filtration [11], and adsorption [12]. Among these methods, the adsorption technology is widely used to remove various contaminants because it is efficient, economical, and environmentally friendly.…”

Novel Polymer Sorbents with Imprinted Task-Specific Ionic Liquids for Metal Removal

“…Particularly high extraction properties and specific mechanism in a liquid–liquid system caused the immobilization of ILs on silica or polymer supports [ 13 , 14 , 15 ]. By incorporating organic functional groups onto the silica surface, there is an increase in uptake of metals and CO 2 , which improves the process efficiency [ 16 , 17 , 18 , 19 , 20 ], while a combination of polymers and ionic liquids can simultaneously remove both inorganic and organics pollutants from water [ 21 ]. The immobilization on polymer supports was performed both in the case of commercial ILs as well as newly designed compounds, although in the first group, mainly impregnation was used.…”