Perfluorinated phenols as extraction agents for Cs⁺ and Sr²⁺

Abstract

The extraction efficiency of some perfluorinated phenols for the removal of Cs + and Sr 2+ from aqueous solutions is reported. The perfluorinated phenols C 6 F 5 OH and 2,3,5,6-C 6 F 4 HOH have been shown to extract 90 Sr 2+ or Cs + from aqueous solutions into a 100 : 1 mixture of toluene and pyridine in reasonable efficiencies, using radio-tracer and ICP-OES techniques. Additionally uranium, 59 Fe 3+ {as a model for Pu(IV)} and Eu 3+ {as a model for Am(III)} were investigated, with only iron not being successfully extracted.

Fluorine–Fluorine Interactions in the Solid State: An Experimental and Theoretical Study

“…We have an interest in the use of fluorinated compounds in applications to environmental chemistry and separation science. Recently we reported on the use of fluorinated phenols for the extraction of Cs + and Sr 2+ from water into toluene, and the use of highly fluorinated phosphine oxides, Rf 3 PO and Rf 2 P(O)C 2 H 4 P(O)Rf 2 , and ketones, Rf 2 CO (Rf = {CF 3 (CF 2 ) 5 CH 2 CH 2 }) as extractants for toxic metals, radionuclides, and precious metals . During the course of these studies we have determined the solid state structures of several highly fluorinated molecules, and the supramolecular structures show numerous C–F···F–C contacts closer than the sum of the van der Waals radii (2.94 Å).…”

Adsorption Breakthrough Curves for Alkaline-Earth Metal Ions on the Resins in a Fixed-Bed Column

“…However, all these methods cannot obtain ideal effect, when large amounts of other elements such as magnesium, calcium coexist with strontium. According to reported, adsorption method has been proved to be an attractive way to remove calcium, magnesium or strontium offering significant advantages like the cheapest, easy availability and easy operation, especially from an environmental view [6][7][8]. So far, lots of works have been focused on the adsorption of metal ions from aqueous media and most of studies are static adsorption experiment.…”

Perfluorinated oxygen- and sulfur-containing compounds as extractants for gold(III)

“…Whilst perfluoroalkyl and aryl phosphines have been examined, the corresponding perfluorophosphine oxides have only briefly been described in the literature as intermediates in the synthesis of the phosphines [10,11], and no coordination chemistry has been reported. We have been investigating the use of these perfluorinated analogues of TOPO for extraction of a number of metals and radioisotopes from water into fluorinated solvents [12,13], and the use of perfluorinated phenols for the removal of a number of radionuclides from water [14]. We have also exploited the unique solubility properties of fluorous ketones in the removal of a number of heavy metals from water [15].…”