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Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening

Incorporating nanoparticles (NPs) into the selective layer of thin-film composite (TFC) membranes is a common approach to improve the performance of the resulting thin-film nanocomposite (TFN) membranes. The main challenge in this approach is the leaching out of NPs during membrane operation. Halloy...

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Autores principales: Atashgar, Amirsajad, Emadzadeh, Daryoush, Akbari, Somaye, Kruczek, Boguslaw
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9958727/
https://www.ncbi.nlm.nih.gov/pubmed/36837748
http://dx.doi.org/10.3390/membranes13020245
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author Atashgar, Amirsajad
Emadzadeh, Daryoush
Akbari, Somaye
Kruczek, Boguslaw
author_facet Atashgar, Amirsajad
Emadzadeh, Daryoush
Akbari, Somaye
Kruczek, Boguslaw
author_sort Atashgar, Amirsajad
collection PubMed
description Incorporating nanoparticles (NPs) into the selective layer of thin-film composite (TFC) membranes is a common approach to improve the performance of the resulting thin-film nanocomposite (TFN) membranes. The main challenge in this approach is the leaching out of NPs during membrane operation. Halloysite nanotubes (HNTs) modified with the first generation of poly(amidoamine) (PAMAM) dendrimers (G1) have shown excellent stability in the PA layer of TFN reverse-osmosis (RO) membranes. This study explores, for the first time, using these NPs to improve the properties of TFN nanofiltration (NF) membranes. Membrane performance was evaluated in a cross-flow nanofiltration (NF) system using 3000 ppm aqueous solutions of MgCl(2), Na(2)SO(4) and NaCl, respectively, as feed at 10 bar and ambient temperature. All membranes showed high rejection of Na(2)SO(4) (around 97–98%) and low NaCl rejection, with the corresponding water fluxes greater than 100 L m(−2) h(−1). The rejection of MgCl(2) (ranging from 82 to 90%) was less than that for Na(2)SO(4). However, our values are much greater than those reported in the literature for other TFN membranes. The remarkable rejection of MgCl(2) is attributed to positively charged HNT-G1 nanoparticles incorporated in the selective polyamide (PA) layer of the TFN membranes.
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spelling pubmed-99587272023-02-26 Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening Atashgar, Amirsajad Emadzadeh, Daryoush Akbari, Somaye Kruczek, Boguslaw Membranes (Basel) Article Incorporating nanoparticles (NPs) into the selective layer of thin-film composite (TFC) membranes is a common approach to improve the performance of the resulting thin-film nanocomposite (TFN) membranes. The main challenge in this approach is the leaching out of NPs during membrane operation. Halloysite nanotubes (HNTs) modified with the first generation of poly(amidoamine) (PAMAM) dendrimers (G1) have shown excellent stability in the PA layer of TFN reverse-osmosis (RO) membranes. This study explores, for the first time, using these NPs to improve the properties of TFN nanofiltration (NF) membranes. Membrane performance was evaluated in a cross-flow nanofiltration (NF) system using 3000 ppm aqueous solutions of MgCl(2), Na(2)SO(4) and NaCl, respectively, as feed at 10 bar and ambient temperature. All membranes showed high rejection of Na(2)SO(4) (around 97–98%) and low NaCl rejection, with the corresponding water fluxes greater than 100 L m(−2) h(−1). The rejection of MgCl(2) (ranging from 82 to 90%) was less than that for Na(2)SO(4). However, our values are much greater than those reported in the literature for other TFN membranes. The remarkable rejection of MgCl(2) is attributed to positively charged HNT-G1 nanoparticles incorporated in the selective polyamide (PA) layer of the TFN membranes. MDPI 2023-02-18 /pmc/articles/PMC9958727/ /pubmed/36837748 http://dx.doi.org/10.3390/membranes13020245 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Atashgar, Amirsajad
Emadzadeh, Daryoush
Akbari, Somaye
Kruczek, Boguslaw
Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title_full Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title_fullStr Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title_full_unstemmed Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title_short Incorporation of Functionalized Halloysite Nanotubes (HNTs) into Thin-Film Nanocomposite (TFN) Nanofiltration Membranes for Water Softening
title_sort incorporation of functionalized halloysite nanotubes (hnts) into thin-film nanocomposite (tfn) nanofiltration membranes for water softening
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9958727/
https://www.ncbi.nlm.nih.gov/pubmed/36837748
http://dx.doi.org/10.3390/membranes13020245
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