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Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide

A novel thin film nanocomposite (TFN) forward osmosis (FO) membrane with a positively charged and nanofunctional substrate layer has been developed for effective heavy metal ions removal. The substrate layer is constructed by adding titania nanotubes and magnetite oxide hybrid nanoparticles (TNT–Fe3...

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Main Authors: Soo, Kar Weng, Wong, Kar Chun, Goh, Pei Sean, Ismail, Ahmad Fauzi, Othman, Norasikin
Format: Article
Published: Elsevier Ltd 2020
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/93164/
http://dx.doi.org/10.1016/j.jwpe.2020.101591
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spelling my.utm.931642021-11-19T03:22:39Z http://eprints.utm.my/id/eprint/93164/ Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide Soo, Kar Weng Wong, Kar Chun Goh, Pei Sean Ismail, Ahmad Fauzi Othman, Norasikin TP Chemical technology A novel thin film nanocomposite (TFN) forward osmosis (FO) membrane with a positively charged and nanofunctional substrate layer has been developed for effective heavy metal ions removal. The substrate layer is constructed by adding titania nanotubes and magnetite oxide hybrid nanoparticles (TNT–Fe3O4) in the polysulfone (PSf) matrix. The introduction of nanoparticles endowed the substrate layer with improved hydrophilicity and loose structure. The modified substrate layer also improved the affinity between the nanofillers and polymer matrix, hence maintaining the selectivity of membrane. Compared to pristine thin film composite (TFC) membrane, the TFN with 0.5 wt.% nanofillers loading showed enhanced water flux from 1.63 to 2.82 L m−2 h−1 without losing its selectivity in terms of Js/Jv ratio when operated in FO mode. The enhancement was mainly attributed to the improved substrate hydrophilicity which has effectively reduced the internal polarization concentration (ICP). The best performing TFN-0.5 membrane increased the water flux with 73% compared to TFC and exhibited a high Cd2+ and Pb2+ heavy metal ion rejection of >98%. By designing the substrate layer, this study demonstrated the feasibility of enhancing the performance of FO membrane for treating heavy metal wastewater through a simple and efficient method. Elsevier Ltd 2020 Article PeerReviewed Soo, Kar Weng and Wong, Kar Chun and Goh, Pei Sean and Ismail, Ahmad Fauzi and Othman, Norasikin (2020) Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide. Journal of Water Process Engineering, 38 . p. 101591. ISSN 2214-7144 http://dx.doi.org/10.1016/j.jwpe.2020.101591
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 TP Chemical technology
spellingShingle TP Chemical technology
Soo, Kar Weng
Wong, Kar Chun
Goh, Pei Sean
Ismail, Ahmad Fauzi
Othman, Norasikin
Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
description A novel thin film nanocomposite (TFN) forward osmosis (FO) membrane with a positively charged and nanofunctional substrate layer has been developed for effective heavy metal ions removal. The substrate layer is constructed by adding titania nanotubes and magnetite oxide hybrid nanoparticles (TNT–Fe3O4) in the polysulfone (PSf) matrix. The introduction of nanoparticles endowed the substrate layer with improved hydrophilicity and loose structure. The modified substrate layer also improved the affinity between the nanofillers and polymer matrix, hence maintaining the selectivity of membrane. Compared to pristine thin film composite (TFC) membrane, the TFN with 0.5 wt.% nanofillers loading showed enhanced water flux from 1.63 to 2.82 L m−2 h−1 without losing its selectivity in terms of Js/Jv ratio when operated in FO mode. The enhancement was mainly attributed to the improved substrate hydrophilicity which has effectively reduced the internal polarization concentration (ICP). The best performing TFN-0.5 membrane increased the water flux with 73% compared to TFC and exhibited a high Cd2+ and Pb2+ heavy metal ion rejection of >98%. By designing the substrate layer, this study demonstrated the feasibility of enhancing the performance of FO membrane for treating heavy metal wastewater through a simple and efficient method.
format Article
author Soo, Kar Weng
Wong, Kar Chun
Goh, Pei Sean
Ismail, Ahmad Fauzi
Othman, Norasikin
author_facet Soo, Kar Weng
Wong, Kar Chun
Goh, Pei Sean
Ismail, Ahmad Fauzi
Othman, Norasikin
author_sort Soo, Kar Weng
title Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
title_short Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
title_full Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
title_fullStr Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
title_full_unstemmed Efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
title_sort efficient heavy metal removal by thin film nanocomposite forward osmosis membrane modified with geometrically different bimetallic oxide
publisher Elsevier Ltd
publishDate 2020
url http://eprints.utm.my/id/eprint/93164/
http://dx.doi.org/10.1016/j.jwpe.2020.101591
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score 13.211869

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