Please use this identifier to cite or link to this item: https://hdl.handle.net/11499/9418
Title: Amino acid functionalized magnetic nanoparticles for removal of Ni(II) from aqueous solution
Authors: Singh, D.
Singh, S.K.
Atar, Necip
Krishna, V.
Keywords: Adsorption
Desorption
Functionalized magnetic nanoparticles
Isotherm
Kinetic
Ni(II) ions
Amino acids
Dyes
Electron microscopy
Fourier transform infrared spectroscopy
High resolution transmission electron microscopy
Isotherms
Kinetics
Magnetism
Nanomagnetics
Nanoparticles
Nickel
Reaction kinetics
Scanning electron microscopy
Solutions
Thermodynamics
Transmission electron microscopy
Acid-functionalized magnetic nanoparticles
Adsorption thermodynamics
Batch adsorption techniques
Intra-particle diffusion
Langmuir and Freundlich isotherm models
Langmuir isotherm models
Magnetic nano-particles
Pseudo-second order model
Publisher: Taiwan Institute of Chemical Engineers
Abstract: In this study, asparagine functionalized magnetic nanoparticles (Fe3O4-Aspa) were prepared and characterized by fourier transform infrared spectroscopy, x-ray diffractometer, scanning electron microscopy, transmission electron microscopy, vibrational sampling magnetometer and pHzpc. The functionalized magnetic nanoparticles were applied for Ni(II) adsorption by batch adsorption technique under different variable factors such as temperature, pH, contact time, adsorbent dosage etc. The study indicates that the adsorption reaction has fast kinetics with applied pseudo-first-order, pseudo-second-order, intra-particle diffusion and Elovich model. The pseudo-second order model found to be best linear fit with experimental data of Ni(II) adsorption. The high correlation coefficient (R2) of 0.996, 0.998, 0.998 and 0.999 at 20, 40, 60 and 80 mg l-1 of aqueous solution reveal that the pseudo-second order model is suitable for Ni(II) ions adsorption. The effect of contact time on Ni(II) adsorption has described that solution equilibrium was achieved within 70 min at optimized pH 6. The experimental adsorption capacity values were applied to Langmuir and Freundlich isotherm model and found satisfactory result through best linear fitting of Langmuir isotherm model with high R2 of 0.999, 0.998 and 0.996 at 303, 308, and 313 K, respectively. The adsorption thermodynamics of parameters are found to be as 344.087 (kJ mol-1), 101.583 (kJ mol-1 K-1) and 1.640–1.172 (kJ mol-1), respectively at ?H°, ?Sº and ?Gº which indicates that the adsorption process is spontaneous with exothermic nature. © 2016 Taiwan Institute of Chemical Engineers
URI: https://hdl.handle.net/11499/9418
https://doi.org/10.1016/j.jtice.2016.06.017
ISSN: 1876-1070
Appears in Collections:Mühendislik Fakültesi Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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