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Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium

Herein we present a new approach for the complete removal of CrVI species, through reduction of CrVI to CrIII, followed by adsorption of CrIII. Reduction of chromium from water is an important challenge, as CrIV is one of the most toxic substances emitted from industrial processes. Chitosan (CS) thi...

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Main Authors: Nayak, Vignesh, Jyothi, Mannekote Shivanna, Balakrishna, R. Geetha, Padaki, Mahesh, Ismail, Ahmad Fauzi
Format: Article
Published: John Wiley and Sons Inc. 2015
Subjects:
Q Science (General)
Online Access:http://eprints.utm.my/id/eprint/55037/
http://dx.doi.org/10.1002/open.201402133
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spelling my.utm.550372016-08-24T06:36:17Z http://eprints.utm.my/id/eprint/55037/ Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium Nayak, Vignesh Jyothi, Mannekote Shivanna Balakrishna, R. Geetha Padaki, Mahesh Ismail, Ahmad Fauzi Q Science (General) Herein we present a new approach for the complete removal of CrVI species, through reduction of CrVI to CrIII, followed by adsorption of CrIII. Reduction of chromium from water is an important challenge, as CrIV is one of the most toxic substances emitted from industrial processes. Chitosan (CS) thin films were developed on plain polysulfone (PSf) and PSf/TiO2 membrane substrates by a temperature-induced technique using polyvinyl alcohol as a binder. Structure property elucidation was carried out by X-ray diffraction, microscopy, spectroscopy, contact angle measurement, and water uptake studies. The increase in hydrophilicity followed the order: PSf < PSf/TiO2 < PSf/TiO2/CS membranes. Use of this thin-film composite membrane for chromium removal was investigated with regards to the effects of light and pH. The observations reveal 100 % reduction of CrVI to CrIII through electrons and protons donated from OH and NH2 groups of the CS layer; the reduced CrIII species are adsorbed onto the CS layer via complexation to give chromium-free water. John Wiley and Sons Inc. 2015-06-01 Article PeerReviewed Nayak, Vignesh and Jyothi, Mannekote Shivanna and Balakrishna, R. Geetha and Padaki, Mahesh and Ismail, Ahmad Fauzi (2015) Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium. Chemistry Open, 4 (3). pp. 278-287. ISSN 2191-1363 http://dx.doi.org/10.1002/open.201402133 DOI:10.1002/open.201402133
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic Q Science (General)
spellingShingle Q Science (General)
Nayak, Vignesh
Jyothi, Mannekote Shivanna
Balakrishna, R. Geetha
Padaki, Mahesh
Ismail, Ahmad Fauzi
Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
description Herein we present a new approach for the complete removal of CrVI species, through reduction of CrVI to CrIII, followed by adsorption of CrIII. Reduction of chromium from water is an important challenge, as CrIV is one of the most toxic substances emitted from industrial processes. Chitosan (CS) thin films were developed on plain polysulfone (PSf) and PSf/TiO2 membrane substrates by a temperature-induced technique using polyvinyl alcohol as a binder. Structure property elucidation was carried out by X-ray diffraction, microscopy, spectroscopy, contact angle measurement, and water uptake studies. The increase in hydrophilicity followed the order: PSf < PSf/TiO2 < PSf/TiO2/CS membranes. Use of this thin-film composite membrane for chromium removal was investigated with regards to the effects of light and pH. The observations reveal 100 % reduction of CrVI to CrIII through electrons and protons donated from OH and NH2 groups of the CS layer; the reduced CrIII species are adsorbed onto the CS layer via complexation to give chromium-free water.
format Article
author Nayak, Vignesh
Jyothi, Mannekote Shivanna
Balakrishna, R. Geetha
Padaki, Mahesh
Ismail, Ahmad Fauzi
author_facet Nayak, Vignesh
Jyothi, Mannekote Shivanna
Balakrishna, R. Geetha
Padaki, Mahesh
Ismail, Ahmad Fauzi
author_sort Nayak, Vignesh
title Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
title_short Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
title_full Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
title_fullStr Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
title_full_unstemmed Preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
title_sort preparation and characterization of chitosan thin films on mixed-matrix membranes for complete removal of chromium
publisher John Wiley and Sons Inc.
publishDate 2015
url http://eprints.utm.my/id/eprint/55037/
http://dx.doi.org/10.1002/open.201402133
_version_ 1643653675217846272
score 13.211869

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