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Surface modified magnetic Fe₃O₄ nanoparticles as a selective sorbent for solid phase extraction of uranyl ions from water samples

Sadeghi, Susan, Azhdari, Hoda, Arabi, Hadi, Moghaddam, Ali Zeraatkar
Journal of hazardous materials 2012 v.215-216 pp. 208-216
Fourier transform infrared spectroscopy, X-ray diffraction, adsorption, aqueous solutions, chemical structure, ions, iron oxides, magnetic properties, nanoparticles, quercetin, response surface methodology, sol-gel processing, solid phase extraction, sorption isotherms, transmission electron microscopy, vibration
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.