Aminopropyl functionalization of superparamagnetic iron oxide/SiO2 nanocrystals for adsorption of bisphenol A from water. Issue 56 (1st December 2016)

• Record Type: Journal Article
• Authors: Farmany, A.; Shirmohammadi, M.M.; Kazemi, S.; Hatami, M.; Mortazavi, S.S.
• Is Part Of: Desalination and water treatment. Volume 57:Issue 56(2016)
• Page Start: 27355
• Page End: 27362
• Publication Date: 2016-12-01
• Subjects: Water -- Bisphenol A -- Superparamagnetic iron oxide nanocrystal/SiO2–NH2 -- Adsorption; Saline water conversion -- Periodicals; Saline water conversion; Water -- Purification; Periodicals; 628.167
• DOI: 10.1080/19443994.2016.1182077
• Languages: English
• ISSNs: 1944-3994

Abstract

Abstract: 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 N2 adsorption–desorption Brunauer-Emmet-Teller procedure. Large surface area (208.0 m 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.