Removal of diethyl phthalate from aqueous phase using magnetic poly(EGDMA-VP) beads
No Thumbnail Available
Date
2012-08-30
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
The barium hexaferrite (BaFe12O19) containing magnetic poly(ethylene glycol dimethacrylate-vinyl pyridine), (mag-poly(EGDMA-VP)) beads (average diameter =53-212 mu m) were synthesized and characterized. Their use as an adsorbent in the removal of diethyl phthalate (DEP) from an aqueous solution was investigated. The mag-poly( EGDMA-VP) beads were prepared by copolymerizing of 4-vinyl pyridine (VP) with ethylene glycol dimethacrylate (EGDMA). The mag-poly(EGDMA-VP) beads were characterized by N-2 adsorption/desorption isotherms (BET), vibrating sample magnetometer (VSM). X-ray powder diffraction (XRD), elemental analysis, scanning electron microscope (SEM) and swelling studies. At a fixed solid/solution ratio, the various factors affecting the adsorption of DEP from aqueous solutions such as pH, initial concentration, contact time and temperature were analyzed. The maximum DEP adsorption capacity of the mag-poly(EGDMA-VP) beads was determined as 98.9 mg/g at pH 3.0, 25 degrees C. All the isotherm data can be fitted with both the Langmuir and the Dubinin-Radushkevich isotherm models. The pseudo first-order, pseudo-second-order. Ritch-second-order and intraparticle diffusion models were used to describe the adsorption kinetics. The thermodynamic parameters obtained indicated the exothermic nature of the adsorption. The DEP adsorption capacity did not change after 10 batch successive reactions, demonstrating the usefulness of the magnetic beads in applications.
Description
Keywords
Engineering, Environmental sciences & ecology, Diethyl phthalate, Removal, Barium hexaferrite, Magnetic beads, Heavy-metal ions, Activated carbon, Adsorption, Kinetics, Water, Equilibrium, Cu(II), Resin, Chitosan, Isotherm, Barium, Dyes, Esters, Ferrite, Isotherms, Scanning electron microscopy, Synthesis (chemical), X ray powder diffraction, 4-vinyl pyridine, Adsorption capacities, Adsorption kinetics, Adsorption/desorption, Aqueous phase, Average diameter, Barium hexaferrites, Contact time, Diethyl phthalate, Dubinin-radushkevich, Ethylene glycol dimethacrylate, Initial concentration, First-order, Intraparticle diffusion models, Isotherm data, Isotherm models, Langmuirs, Magnetic beads, Solid/solution ratio, Swelling studies, Thermodynamic parameter, Vibrating sample magnetometer, Xrd, Adsorption, Aqueous solution, Desorption, Isotherm, Organic pollutant, pH, Pollutant removal, Polymerization, Scanning electron microscopy, Thermodynamics, X-ray diffraction
Citation
Özer, E. T. vd. (2012). "Removal of diethyl phthalate from aqueous phase using magnetic poly(EGDMA-VP) beads". Journal of Hazardous Materials, 229, 20-28.