Aminopropyl functionalization of superparamagnetic iron oxide/SiO2 nanocrystals for adsorption of bisphenol A from water

作者：Farmany A; Shirmohammadi M M; Kazemi S; Hatami M; Mortazavi S S

来源：Desalination and Water Treatment, 2016, 57(56): 27355-27362.

DOI：10.1080/19443994.2016.1182077

• Water
• Bisphenol A
• Superparamagnetic iron oxide nanocrystal
• SiO2-NH2
• Adsorption

Iron oxide nanocrystals synthesized by a co-precipitation method were decorated with an aminopropyl functionalized silica layer and characterized by Fourier transform infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. Surface area of nanocrystals was measured using the N-2 adsorption-desorption Brunauer-Emmet-Teller procedure. Large surface area (208.0m(2)/g) of nanocrystals confirmed their potential for adsorption of organic/inorganic material. So the nanocrystals were used for adsorption of Bisphenol A (BPA) from aqueous solutions. As a continuation, the influence of different parameters including adsorbent dosage, pH, temperature, and ionic strength on the removal efficiency of BPA was studied. The experimental data were fitted well with the pseudo-second-order kinetic model (R-2=0.99). The adsorption isotherm was described well by the Freundlich isotherm.

• 出版日期2016-12