Thumbnail
Access Restriction
Open

Author Culita, Daniela C. ♦ Simonescu, Claudia Maria ♦ Patescu, Rodica-Elena ♦ Dragne, Mioara ♦ Stanica, Nicolae ♦ Oprea, Ovidiu
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY ♦ ADSORBENTS ♦ ADSORPTION ♦ AQUEOUS SOLUTIONS ♦ COMPARATIVE EVALUATIONS ♦ CONCENTRATION RATIO ♦ ELECTRONS ♦ FERRITES ♦ FOURIER TRANSFORM SPECTROMETERS ♦ FOURIER TRANSFORMATION ♦ HEAVY METALS ♦ IONS ♦ IRON OXIDES ♦ MAGNETITE ♦ NANOPARTICLES ♦ NANOSTRUCTURES ♦ SILICA ♦ TRANSMISSION ELECTRON MICROSCOPY ♦ WATER ♦ X RADIATION ♦ X-RAY DIFFRACTION
Abstract o-Vanillin functionalized mesoporous silica – coated magnetite (Fe{sub 3}O{sub 4}@MCM-41-N-oVan) was synthesized and fully characterized by X-ray diffraction, Fourier transform infrared spectroscopy, transmission electron microscopy, N{sub 2} adsorption–desorption technique and magnetic measurements. The capacity of Fe{sub 3}O{sub 4}@MCM-41-N-oVan to adsorb Pb(II) from aqueous solutions was evaluated in comparison with raw mesoporous silica – coated magnetite (Fe{sub 3}O{sub 4}@MCM-41) and amino – modified mesoporous silica coated magnetite (Fe{sub 3}O{sub 4}@MCM-41-NH{sub 2}). The effect of adsorption process parameters such us pH, contact time, initial Pb(II) concentration was also investigated. The adsorption data were successfully fitted with the Langmuir model, exhibiting a maximum adsorption capacity of 155.71 mg/g at pH=4.4 and T=298 K. The results revealed that the adsorption rate was very high at the beginning of the adsorption process, 80–90% of the total amount of Pb(II) being removed within the first 60 min, depending on the initial concentration. The results of the present work suggest that Fe{sub 3}O{sub 4}@MCM-41-N-oVan is a suitable candidate for the separation of Pb(II) from contaminated water. - Graphical abstract: A novel magnetic adsorbent based on o-vanillin functionalized mesoporous silica – coated magnetite was synthesized and fully characterized and its adsorption capacity for Pb(II) ions in aqueous solutions was evaluated. The maximum adsorption capacity for Pb(II) ions was determined to be 155.71 mg g{sup −1}. The adsorption rate was very high at the beginning of the adsorption process, 90% of the total amount of Pb(II) being removed within the first 60 min. Display Omitted.
ISSN 00224596
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-15
Publisher Place United States
Journal Journal of Solid State Chemistry
Volume Number 238


Open content in new tab

   Open content in new tab