title: Perfluorinated phosphine oxide and sulfides as extractants for heavy metals and radionuclides.
abstract: New highly fluorinated monodentate and bidentate phosphine oxide compounds of the type {CF(3)(CF(2))(n)CH(2)CH(2)}(3)PO (n = 5, 9) and [{CF(3)(CF(2))(5)CH(2)CH(2)}(2)P(O)CH(2)CH(2)P(O){CH(2)CH(2)(CF(2))(5)CF(3)}] have been prepared. Their ability to extract a number of metals and radionuclides from aqueous solutions into perfluorinated solvents has been established and the extractable species investigated. All extractants extract the metals As(V), Cd(II), Co(II), Cr(VI), Hg(II), Pb(II), and Sn(II) with >75% removal. In addition, the radioisotopes (90)Sr(II), (133)Ba(II), and U(VI) have been investigated, whilst (59)Fe(III) has been used to model the extraction of plutonium. (133)Ba(II) shows a high distribution ratio for monodentate phosphine oxides, whilst for UO(2)(2+) and (59)Fe(III) bidentate phosphine oxides are superior.
authors: School of Chemistry, University of Dublin, Trinity College, Dublin 2, Ireland. bakerrj@tcd.ie
authors: Robert J
authors: RJ
authors: Baker
authors: Julia
authors: J
authors: Fuchs
authors: Amanda J
authors: AJ
authors: Richards
authors: Helen V
authors: HV
authors: Ogilvie
mesh_terms: D004785:Environmental Pollutants; D052918:Environmental Restoration and Remediation / Q000379:methods; D054879:Halogenation; D019216:Metals, Heavy; D010087:Oxides; D010720:Phosphines; D011868:Radioisotopes; D012997:Solvents; D013440:Sulfides; D014867:Water
chemical_list: D004785:Environmental Pollutants; D019216:Metals, Heavy; D010087:Oxides; D010720:Phosphines; D011868:Radioisotopes; D012997:Solvents; D013440:Sulfides; D014867:Water