Synergistic Solvent Impregnated Resin for Adsorptive Separation of Lithium Ion

Abstract

A novel synergistic solvent impregnated resin (SIR), containing both 1-phenyl-1,3-tetradecanedione (C11phβDK) and tri-n-octylphosphine oxide (TOPO), was used for the selective adsorption of Li+ in aqueous chloride media. The extractants have a synergistic effect on the ability of the SIR system to adsorb Li+ ion with high selectivity relative to Na+ and K+. The extent of adsorption of Li+ is increased with an increase in the amount of TOPO impregnated in the SIR. Li+ can be effectively separated from a solution containing a high concentration of Na+ by column chromatography using a column packed with SIR.

Recovery of Indium(III) from a Hydrochloric Acid Medium with Two Types of Solvent Impregnated Resins Containing Sec-octylphenoxy Acetic Acid

“…The stripping amount (mg) was the amount of metal ions stripped from loaded SIRs to the stripping solution. The stripping efficiency (%) was calculated from equation (12).…”

“…SIRs comprising a polymeric matrix and an impregnated liquid extractant, are relatively easily to prepare. They combine the unique features and advantages of liquid-liquid extraction and ion exchange [11][12][13]. In SIRs, a soluble complexant (including an inert organic solvent acting as a diluent, if necessary) is sorbed into a porous polymer matrix by an impregnation technique [13].…”

Zn(II) Sorption From Aqueous Solutions Using Polymeric MicrocapsulesContaining 2-Ethylhexylphosphonic Acid Mono-2-Ethylhexyl Ester

“…This technology consisted of the immobilisation of the ion-exchanger extractant in a hydrophobic porous polymeric matrix. One interesting option to retain the ion-exchanger in a solid phase is the use of solvent impregnated resins (SIRs), which are very simple to prepare and involve impregnation of an extractant in a macroporous polymeric resin [13,14]. Another possibility is the microencapsulation of the extractant in a polymeric structure synthesised by in situ free radical polymerisation [15,16].…”

Adsorption of Pollutant Ions From Residual Aqueous Solutions Onto Nano-Structured Calcium Silicate

“…During the past years a number of sorbents have been used successfully to treat industrial and mining wastewaters, natural surface and ground waters as well as acidic mine drainages (AMD), which are highly polluted with heavy metals ions and anions 10,11) . Examples of natural and synthetic adsorbents are among others activated carbon 12) , zeolites 13,14) , various clays 15) , kaolinites 16) , metal oxides 17) , and organic compounds like chitosan 18) , sawdust 19) , and allophones 20) , solvent impregnated resins (SIR) 21) and polymeric matrices that encapsulate organic extractants in their porous structure 22,23) . Many of the adsorbents have quite distinct and different properties and adsorbent activity, which make them interesting to study.…”