title: Surface modified magnetic Fe3O4 nanoparticles as a selective sorbent for solid phase extraction of uranyl ions from water samples.
abstract: In this study, silica-coated magnetic nanoparticles modified with quercetin were synthesized by a sol-gel method. These magnetic nanoparticles were assessed as a new solid phase sorbent for extraction of uranyl ions from aqueous solutions. The crystal and chemical structures and magnetic property of the new sorbent were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectrophotometer (FT-IR), and vibration sample magnetometer (VSM). The experimental parameters affecting the extraction efficiency of uranyl ions from aqueous solutions using the synthesized sorbent were optimized by means of the response surface methodology. The adsorption equilibrium of uranyl ions onto the sorbent was explained by Langmuir isotherm and maximum monolayer adsorption capacity was found 12.33mg/g. The synthesized sorbent was applied to extraction of uranyl ions from different water samples.
authors.affiliation: Department of Chemistry, Faculty of Science, University of Birjand, P.O. Box. 97175/615, Birjand, Iran. ssadeghi@birjand.ac.ir
authors.forename: Susan
authors.initials: S
authors.lastname: Sadeghi
authors.forename: Hoda
authors.initials: H
authors.lastname: Azhdari
authors.forename: Hadi
authors.initials: H
authors.lastname: Arabi
authors.forename: Ali Zeraatkar
authors.initials: AZ
authors.lastname: Moghaddam
mesh_terms: D000327:Adsorption; D008280:Magnetics; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D052616:Solid Phase Extraction; D014501:Uranium / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D058185:Magnetite Nanoparticles; D014874:Water Pollutants, Chemical; D014501:Uranium