title: Synthesis and characterization of new ion-imprinted polymer for separation and preconcentration of uranyl (UO2(2+)) ions.
abstract: UO(2)(2+) ion-imprinted polymer materials used for solid-phase extraction were prepared by copolymerization of a ternary complex of uranyl ions with styrene and divinyl benzene in the presence of 2,2'-azobisisobutyronitrile. The imprinted particles were leached by HCl 6M. Various parameters in polymerization steps such as DVB/STY ratio, time of polymerization and temperature of polymerization were varied to achieve the most efficient uranyl-imprinted polymer. X-ray diffraction (XRD), infra-red spectroscopy (IR), thermo gravimetric analysis (TGA), UV-vis and nitrogen sorption were used to characterize the polymer particles. The XRD results showed that uranyl ions were completely removed from the polymer after leaching process. IR Analysis indicated that the N,N'-ethylenebis(pyridoxylideneiminato) remained intact in the polymer even after leaching. Some parameters such as pH, weight of the polymer, elution time, eluent volume and aqueous phase volume which affects the efficiency of the polymer were studied.
authors.affiliation: Nuclear Fuel Cycle School, Nuclear Science and Technology Research Institute, P.O. Box: 11365-8486, Tehran, Iran. sjahmadi@aeoi.org.ir
authors.forename: Seyed Javad
authors.initials: SJ
authors.lastname: Ahmadi
authors.forename: Omid
authors.initials: O
authors.lastname: Noori-Kalkhoran
authors.forename: Simindokht
authors.initials: S
authors.lastname: Shirvani-Arani
mesh_terms: D003432:Cross-Linking Reagents / Q000737:chemistry; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D007477:Ions; D008956:Models, Chemical; D009570:Nitriles / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*; D013055:Spectrophotometry, Infrared / Q000379:methods; D020058:Styrene / Q000737:chemistry; D013696:Temperature; D013818:Thermogravimetry / Q000379:methods; D014466:Ultraviolet Rays; D014501:Uranium / Q000737:chemistry* / Q000302:isolation & purification; D014753:Vinyl Compounds / Q000737:chemistry; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D003432:Cross-Linking Reagents; D007477:Ions; D009570:Nitriles; D011108:Polymers; D014753:Vinyl Compounds; D020058:Styrene; D014501:Uranium; C004526:azobis(isobutyronitrile); C004985:divinyl benzene; D009584:Nitrogen