Skip to main content

Lund University Publications

LUND UNIVERSITY LIBRARIES

Novel three-dimensional chitosan-carbon nanotube–PVA nanocomposite hydrogel for removal of Cr6+ from wastewater

Eldeeb, Tarek M. ; Nemr, Ahmed El ; Khedr, Mohamed H. ; El-Dek, S. I. and Imam, Neama G. LU (2020) In Desalination and Water Treatment 184. p.163-177
Abstract

A novel hybrid nanocomposite adsorbent was prepared by encapsulation of multi-walled carbon nano-tubes within polyvinyl alcohol/chitosan hydrogel (Cs/MWCNT/PVA) and cross-linked with glu-taraldehyde. The chemical reactions between the components affected the position and intensities of the infrared bands. This nanocomposite has excellent Cr6+ ions adsorption efficiency. The optimal conditions of the process as a function of the solution pH, contact time, ionic strength, and sorbent weight were investigated. The batch equilibrium experiments revealed that the most suitable pH for chromium adsorption was at 1.5. The maximum adsorption capacity for the hydrogel was 217.4 mg g–1 as estimated by the Langmuir model.... (More)

A novel hybrid nanocomposite adsorbent was prepared by encapsulation of multi-walled carbon nano-tubes within polyvinyl alcohol/chitosan hydrogel (Cs/MWCNT/PVA) and cross-linked with glu-taraldehyde. The chemical reactions between the components affected the position and intensities of the infrared bands. This nanocomposite has excellent Cr6+ ions adsorption efficiency. The optimal conditions of the process as a function of the solution pH, contact time, ionic strength, and sorbent weight were investigated. The batch equilibrium experiments revealed that the most suitable pH for chromium adsorption was at 1.5. The maximum adsorption capacity for the hydrogel was 217.4 mg g–1 as estimated by the Langmuir model. Other isotherm models, such as Freundlich and Temkin, were used to analyze the experimental data and the models’ parameters were evaluated. The pseudo-first and second-order, Elovich, intraparticle diffusion, and film diffusion kinetic models were also inves-tigated. The obtained results enabled to estimate the possibility to use the Cs/MWCNT/PVA hydrogel in the removal of Cr6+ ions from wastewater by adsorption.

(Less)
Please use this url to cite or link to this publication:
author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Chitosan, Cr ions removal, MWCNT, Nanocomposite, Three-dimensional hydrogel
in
Desalination and Water Treatment
volume
184
pages
15 pages
publisher
Desalination Publications
external identifiers
  • scopus:85087980802
ISSN
1944-3994
DOI
10.5004/dwt.2020.25366
language
English
LU publication?
yes
id
4ff2c1f9-b375-4752-a314-0d6d5f313107
date added to LUP
2020-12-28 14:18:32
date last changed
2022-04-26 22:52:47
@article{4ff2c1f9-b375-4752-a314-0d6d5f313107,
  abstract     = {{<p>A novel hybrid nanocomposite adsorbent was prepared by encapsulation of multi-walled carbon nano-tubes within polyvinyl alcohol/chitosan hydrogel (Cs/MWCNT/PVA) and cross-linked with glu-taraldehyde. The chemical reactions between the components affected the position and intensities of the infrared bands. This nanocomposite has excellent Cr<sup>6+</sup> ions adsorption efficiency. The optimal conditions of the process as a function of the solution pH, contact time, ionic strength, and sorbent weight were investigated. The batch equilibrium experiments revealed that the most suitable pH for chromium adsorption was at 1.5. The maximum adsorption capacity for the hydrogel was 217.4 mg g<sup>–1</sup> as estimated by the Langmuir model. Other isotherm models, such as Freundlich and Temkin, were used to analyze the experimental data and the models’ parameters were evaluated. The pseudo-first and second-order, Elovich, intraparticle diffusion, and film diffusion kinetic models were also inves-tigated. The obtained results enabled to estimate the possibility to use the Cs/MWCNT/PVA hydrogel in the removal of Cr<sup>6+</sup> ions from wastewater by adsorption.</p>}},
  author       = {{Eldeeb, Tarek M. and Nemr, Ahmed El and Khedr, Mohamed H. and El-Dek, S. I. and Imam, Neama G.}},
  issn         = {{1944-3994}},
  keywords     = {{Chitosan; Cr ions removal; MWCNT; Nanocomposite; Three-dimensional hydrogel}},
  language     = {{eng}},
  pages        = {{163--177}},
  publisher    = {{Desalination Publications}},
  series       = {{Desalination and Water Treatment}},
  title        = {{Novel three-dimensional chitosan-carbon nanotube–PVA nanocomposite hydrogel for removal of Cr<sup>6+</sup> from wastewater}},
  url          = {{http://dx.doi.org/10.5004/dwt.2020.25366}},
  doi          = {{10.5004/dwt.2020.25366}},
  volume       = {{184}},
  year         = {{2020}},
}