Please use this identifier to cite or link to this item: http://hdl.handle.net/11452/25715
Title: Kinetic, isotherm and thermodynamic analysis on adsorption of Cr(VI) ions from aqueous solutions by synthesis and characterization of magnetic-poly(divinylbenzene-vinylimidazole) microbeads
Authors: Uludağ Üniversitesi/Fen-Edebiyat Fakültesi/Kimya Bölümü.
Kara, Ali
Demirbel, Emel
AAG-6271-2019
7102824859
54681740300
Keywords: Environmental sciences & ecology
Meteorology & atmospheric sciences
Water resources
Magnetic polymers
Adsorption isotherm
Adsorption kinetic
Adsorption thermodynamic
Cr (VI) ions
Heavy-metal ions
Waste-water
Activated carbon
Hexavalent chromium
Magnetic beads
Removal
Sorption
Biosorption
Adsorbent
Chitosan
Chromium compounds
Desorption
Dyes
Ions
Kinetics
Magnetic fields
Paramagnetism
Polymethyl methacrylates
Scanning electron microscopy
Synthesis (chemical)
Thermoanalysis
Thermodynamics
Adsorption equilibria
Adsorption kinetics
Adsorption thermodynamics
Adsorption/desorption
Apparent activation energy
Average diameter
Contact time
Controlled reactions
Endothermic nature
Entropy changes
Experimental data
Freundlich
Initial concentration
Intraparticle diffusion models
Langmuir isotherm models
Langmuirs
Magnetic beads
Magnetic force
Magnetic polymers
Microbeads
Paramagnetic properties
Pseudo second order kinetics
Solid/solution ratio
Swelling studies
Thermo dynamic analysis
Thermodynamic parameter
Adsorption
Aqueous solution
Benzene
Chromium
Isotherm
Polymer
Removal experiment
Temperature
Thermodynamics
Zinc
Issue Date: Jun-2012
Publisher: Springer International Publishing
Citation: Kara, A. ve Demirbel, E. (2012). "Kinetic, isotherm and thermodynamic analysis on adsorption of Cr(VI) ions from aqueous solutions by synthesis and characterization of magnetic-poly(divinylbenzene-vinylimidazole) microbeads". Water Air & Soil Pollution, 223(5), 2387-2403.
Abstract: The magnetic-poly(divinylbenzene-1-vinylimidazole) [m-poly(DVB-VIM)] microbeads (average diameter 53-212 mu m) were synthesized and characterized; their use as adsorbent in removal of Cr(VI) ions from aqueous solutions was investigated. The m-poly(DVB-VIM) microbeads were prepared by copolymerizing of divinylbenzene (DVB) with 1-vinylimidazole (VIM). The m-poly(DVB-VIM) microbeads were characterized by N-2 adsorption/desorption isotherms, ESR, elemental analysis, scanning electron microscope (SEM) and swelling studies. At fixed solid/solution ratio the various factors affecting adsorption of Cr(VI) ions from aqueous solutions such as pH, initial concentration, contact time and temperature were analyzed. Langmuir, Freundlich and Dubinin-Radushkvich isotherms were used as the model adsorption equilibrium data. Langmuir isotherm model was the most adequate. The pseudo-first-order, pseudo-second-order, Ritch-second-order and intraparticle diffusion models were used to describe the adsorption kinetics. The apparent activation energy was found to be 5.024 kJ mol(-1), which is characteristic of a chemically controlled reaction. The experimental data fitted to pseudo-second-order kinetic. The study of temperature effect was quantified by calculating various thermodynamic parameters such as Gibbs free energy, enthalpy and entropy changes. The thermodynamic parameters obtained indicated the endothermic nature of adsorption of Cr(VI) ions. Morever, after the use in adsorption, the m-poly(DVB-VIM) microbeads with paramagnetic property were separeted via the applied magnetic force. The magnetic beads could be desorbed up to about 97% by treating with 1.0 M NaOH. These features make the m-poly(DVB-VIM) microbeads a potential candidate for support of Cr(VI) ions removal under magnetic field.
URI: https://doi.org/10.1007/s11270-011-1032-1
https://link.springer.com/article/10.1007/s11270-011-1032-1
http://hdl.handle.net/11452/25715
ISSN: 0049-6979
1573-2932
Appears in Collections:PubMed
Scopus
Web of Science

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