Publication: Properties of magnetic microbeads in removing bisphenol-A from aqueous phase
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Osman, Bilgen
Ozer, Elif Tumay
Kara, Ali
Yesilova, Emel
Beşirli, Necati
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Springer
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Abstract
In this study, magnetic poly(ethylene glycol dimethacrylate-N-methacryloyl-l-tryptophan methyl ester) [m-poly(EGDMA-MATrp)] beads (average diameter = 53-103 mu m) were synthesized by copolymerizing of N-methacryloyl-l-tryptophan methyl ester with ethylene glycol dimethacrylate in the presence of magnetite (Fe3O4) and used for removal of bisphenol-A (BPA). The m-poly(EGDMA-MATrp) beads were characterized by N-2 adsorption/desorption isotherms (BET), X-ray photoelectron spectroscopy, scanning electron microscopy, infrared spectroscopy, thermal gravimetric analysis, electron spin resonance analysis and swelling studies. To evaluate the efficiency of m-poly(EGDMA-MATrp) beads for adsorption of BPA from aqueous medium, the effects of pH, initial concentration, contact time and temperature were analyzed. The maximum BPA adsorption capacity of the m-poly(EGDMA-MATrp) beads was determined as 139.6 mg/g at pH 5.0, 25 A degrees C. All the isotherm data can be fitted with the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models. The adsorption process obeyed pseudo-second-order kinetic model.
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Keywords
Chemistry, Materials science, Adsorption, Bisphenol-A, Kinetics, Magnetic beads, Porous materials, Environmental water samples, 17-alpha-ethinyl estradiol, Electrochemical removal, Phenolic-compounds, Isotope-dilution, Waste-water, Adsorption, Carbon, Extraction, Oxidation, Aliphatic compounds, Amino acids, Enzyme kinetics, Esters, Ethylene, Ethylene glycol, Gravimetric analysis, Infrared spectroscopy, Iron oxides, Isotherms, Magnetic moments, Magnetite, Microbeads, Phenols, Polyols, Porous materials, Scanning electron microscopy, Swelling, Thermogravimetric analysis, X ray photoelectron spectroscopy, Adsorption capacities, Bis-phenol a, Ethylene glycol dimethacrylate, Initial concentration, Magnetic beads, Magnetic microbeads, Pseudo-second-order kinetic models, Thermal gravimetric analysis, Electron spin resonance spectroscopy
Citation
Osman, B. vd. (2015). "Properties of magnetic microbeads in removing bisphenol-A from aqueous phase". Journal of Porous Materials, 22(1), 37-46.