Sözeri, Hüseyin2021-11-262021-11-262012-08-30Özer, E. T. vd. (2012). "Removal of diethyl phthalate from aqueous phase using magnetic poly(EGDMA-VP) beads". Journal of Hazardous Materials, 229, 20-28.0304-38941873-3336https://doi.org/10.1016/j.jhazmat.2012.05.037https://pubmed.ncbi.nlm.nih.gov/22749968/https://www.sciencedirect.com/science/article/pii/S0304389412005316http://hdl.handle.net/11452/22804The 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.eninfo:eu-repo/semantics/closedAccessEngineeringEnvironmental sciences & ecologyDiethyl phthalateRemovalBarium hexaferriteMagnetic beadsHeavy-metal ionsActivated carbonAdsorptionKineticsWaterEquilibriumCu(II)ResinChitosanIsothermBariumDyesEstersFerriteIsothermsScanning electron microscopySynthesis (chemical)X ray powder diffraction4-vinyl pyridineAdsorption capacitiesAdsorption kineticsAdsorption/desorptionAqueous phaseAverage diameterBarium hexaferritesContact timeDiethyl phthalateDubinin-radushkevichEthylene glycol dimethacrylateInitial concentrationFirst-orderIntraparticle diffusion modelsIsotherm dataIsotherm modelsLangmuirsMagnetic beadsSolid/solution ratioSwelling studiesThermodynamic parameterVibrating sample magnetometerXrdAdsorptionAqueous solutionDesorptionIsothermOrganic pollutantpHPollutant removalPolymerizationScanning electron microscopyThermodynamicsX-ray diffractionAdsorptionBarium compoundsHydrogen-ion concentrationKineticsMagnetic phenomenaMetal nanoparticlesMethacrylatesPhthalic acidsPolyethylene glycolsPyridinesWater pollutants, chemicalWater purificationArticle0003071308000032-s2.0-84863826566202822922749968Engineering, environmentalEnvironmental sciencesPhthalic Acid Ester; Di-N-Octyl Phthalate; Mono-(2-Ethylhexyl)PhthalateBarium derivativeEthylene glycol derivativeIron derivativeMagnetic nanoparticlePhthalic acid diethyl esterPoly(ethylene glycol dimethacrylate vinylpyridine)Unclassified drugAdsorptionAnalytic methodAqueous solutionArticleChemical analysisConcentration (parameters)DesorptionIsothermpHPolymerizationScanning electron microscopySynthesisTemperatureThermodynamicsVibrating sample magnetometerWaste component removalX ray powder diffraction