Fabrication of smart magnetic nanocomposite asymmetric membrane capsules for the controlled release of nitrate

Emami, N; Razmjou, A; Noorisafa, F; Korayem, AH; Zarrabi, A; Ji, C

Fabrication of smart magnetic nanocomposite asymmetric membrane capsules for the controlled release of nitrate

Emami, N Razmjou, A Noorisafa, F Korayem, AH Zarrabi, A Ji, C

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Environmental Nanotechnology, Monitoring and Management, 2017, 8, pp. 233-243
Issue Date:: 2017-12-01

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Field	Value	Language
dc.contributor.author	Emami, N
dc.contributor.author	Razmjou, A
dc.contributor.author	Noorisafa, F
dc.contributor.author	Korayem, AH
dc.contributor.author	Zarrabi, A
dc.contributor.author	Ji, C
dc.date.accessioned	2023-03-26T23:39:15Z
dc.date.available	2023-03-26T23:39:15Z
dc.date.issued	2017-12-01
dc.identifier.citation	Environmental Nanotechnology, Monitoring and Management, 2017, 8, pp. 233-243
dc.identifier.issn	2215-1532
dc.identifier.uri	http://hdl.handle.net/10453/168483
dc.description.abstract	Nitrate contamination of water resources due to excessive use of nitrogen-based fertilizers has become a global health issue. In this work, a recyclable and environmentally sensitive magnetic Fe2O3/PES (Polyethersulfone) nanocomposite asymmetric membrane like capsules (NAMCs) were prepared such that release nitrate in a controlled manner. Different characterization techniques such as SEM, EDAX, DSC, and surface energy measurement were used to systematically characterize the NAMCs. It was observed that the incorporation of only 0.5 wt.% Fe2O3 nanoparticles into NAMC provided a slow and steady release rate of nitrate. A further addition of nanoparticles (from 0.5 wt.% to 1.5 wt.%) into the capsules matrix resulted in an increase in the initial-release rate (IRR, from 3.17 to 4.17 μS/cm min) and maximum release level (MRL, from 36 to 52 μS/cm). The designed capsules also showed recyclability and the ability to respond to the environmental conditions. For instance, IRR increased from 3.17 to 5.31 μS/cm min for NAMCs when temperature increased only by 10 °C. These findings could be considered as a new and green approach to prevent nitrate contamination of water resources in the first place without exacerbating energy issues. Although this work is based on the controlled release of nitrate as the water resources contaminant, the NAMCs can also be used for other nutrients and fertilizers.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Environmental Nanotechnology, Monitoring and Management
dc.relation.isbasedon	10.1016/j.enmm.2017.09.001
dc.rights	info:eu-repo/semantics/closedAccess
dc.title	Fabrication of smart magnetic nanocomposite asymmetric membrane capsules for the controlled release of nitrate
dc.type	Journal Article
utslib.citation.volume	8
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-26T23:39:14Z
pubs.publication-status	Published
pubs.volume	8

Abstract:

Nitrate contamination of water resources due to excessive use of nitrogen-based fertilizers has become a global health issue. In this work, a recyclable and environmentally sensitive magnetic Fe2O3/PES (Polyethersulfone) nanocomposite asymmetric membrane like capsules (NAMCs) were prepared such that release nitrate in a controlled manner. Different characterization techniques such as SEM, EDAX, DSC, and surface energy measurement were used to systematically characterize the NAMCs. It was observed that the incorporation of only 0.5 wt.% Fe2O3 nanoparticles into NAMC provided a slow and steady release rate of nitrate. A further addition of nanoparticles (from 0.5 wt.% to 1.5 wt.%) into the capsules matrix resulted in an increase in the initial-release rate (IRR, from 3.17 to 4.17 μS/cm min) and maximum release level (MRL, from 36 to 52 μS/cm). The designed capsules also showed recyclability and the ability to respond to the environmental conditions. For instance, IRR increased from 3.17 to 5.31 μS/cm min for NAMCs when temperature increased only by 10 °C. These findings could be considered as a new and green approach to prevent nitrate contamination of water resources in the first place without exacerbating energy issues. Although this work is based on the controlled release of nitrate as the water resources contaminant, the NAMCs can also be used for other nutrients and fertilizers.

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http://hdl.handle.net/10453/168483