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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John Wiley and Sons Inc.
2015
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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 |
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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 |
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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 |
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1643653675217846272 |
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13.251813 |