Supercritical CO2 Assisted Synthesis of EDTA-Fe3O4 Nanocomposite with High Adsorption Capacity for Hexavalent Chromium
Joint Authors
Bisht, Gunjan
Neupane, Sanjila
Makaju, Rebika
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-11-30
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Abstract EN
Efficiency of EDTA functionalized nanoparticles in adsorption of chromium (VI) from water was investigated in this study.
Magnetic iron oxide nanoparticles (IONPs) were synthesized by a simple chemical coprecipitation route and EDTA coating onto IONPs was attained via supercritical carbon dioxide (Sc CO2), a technology with green sustainable properties.
The obtained nanoparticles were then characterized by UV-Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), and vibrating magnetometric analysis (VSM).
The synthesized nanoparticle and its modified variant were evaluated as adsorbent for chromium (VI) removal from water through batch adsorption technique and the effect of analytic concentration; contact time and adsorbent concentration were studied at pH 2.
The results showed higher removal efficiency for modified magnetic iron oxide nanoparticles (MIONPs) (i.e., 99.9%) than their nonmodified variant IONPs, that is, 34.06% for the same concentration after 18 hours of incubation.
Also maximum adsorption capacity (qe = 452.26 mg/g) of MIONPs attained can be related to their preparation in Sc CO2 as qe calculated from IONPs, that is, 170.33 mg/g, is lower than that of MIONPs.
The adsorption data fit well with Freundlich isotherm equation while kinetic adsorption studies of chromium (VI) were modeled by pseudo-second-order model.
American Psychological Association (APA)
Bisht, Gunjan& Neupane, Sanjila& Makaju, Rebika. 2016. Supercritical CO2 Assisted Synthesis of EDTA-Fe3O4 Nanocomposite with High Adsorption Capacity for Hexavalent Chromium. Journal of Nanomaterials،Vol. 2016, no. 2016, pp.1-10.
https://search.emarefa.net/detail/BIM-1109048
Modern Language Association (MLA)
Bisht, Gunjan…[et al.]. Supercritical CO2 Assisted Synthesis of EDTA-Fe3O4 Nanocomposite with High Adsorption Capacity for Hexavalent Chromium. Journal of Nanomaterials No. 2016 (2016), pp.1-10.
https://search.emarefa.net/detail/BIM-1109048
American Medical Association (AMA)
Bisht, Gunjan& Neupane, Sanjila& Makaju, Rebika. Supercritical CO2 Assisted Synthesis of EDTA-Fe3O4 Nanocomposite with High Adsorption Capacity for Hexavalent Chromium. Journal of Nanomaterials. 2016. Vol. 2016, no. 2016, pp.1-10.
https://search.emarefa.net/detail/BIM-1109048
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1109048