Chitosan-/PVA-coated magnetic nanoparticles for Cu(II) ions adsorption

The magnetic chitosan/PVA/iron oxide nanoparticles have been synthesized for the usage of Cu(II) ions removal from aqueous solution. The structure and morphology of the adsorbent was investigated by X-Ray diffraction, scanning electron microscope, and Fourier transform infrared analyses. Adsorption...

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Bibliographic Details
Published in:Desalination and water treatment 2016-08, Vol.57 (39), p.18463-18474
Main Authors: Altinisik, Aylin, Yurdakoc, Kadir
Format: Article
Language:English
Subjects:
Adsorbents
Adsorption
Biosorbent
Biosorption
Chitosan
COATINGS
Copper
Fourier transforms
Ions
Iron oxides
Isotherm
Isotherms
Kinetics
Magnetic chitosan
MATHEMATICAL ANALYSIS
Mathematical models
PARTICLES
Scanning electron microscopy
Sorption
X-ray diffraction
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Summary:The magnetic chitosan/PVA/iron oxide nanoparticles have been synthesized for the usage of Cu(II) ions removal from aqueous solution. The structure and morphology of the adsorbent was investigated by X-Ray diffraction, scanning electron microscope, and Fourier transform infrared analyses. Adsorption performances of the adsorbents were tested as a function of Cu(II) ion concentration, pH value, time, and temperature. The adsorption kinetics and isotherms were analyzed by Lagergren first-order, pseudo-second-order, Elovich equation, intra-particle diffusion models, and Langmuir, Freundlich, DR and BET isotherms, respectively. The kinetics results pointed out pseudo-second-order. Maximum sorption capacity of the adsorbent was estimated to be 500 mg/g at pH 5.0. Thermodynamic parameters such as Gibbs free energy (ΔG°), enthalpy (ΔH°), and entropy (ΔS°) changes were also determined and indicated that the sorption process was endothermic in nature. The magnetic results showed that the adsorbent can be manipulated by an external magnet with sufficient separation. The process is clean, safe, and easy enough for the removal of Cu(II) ions.
ISSN:1944-3986
1944-3994
1944-3986
DOI:10.1080/19443994.2015.1091994