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Rejection of an emerging small neutral organic micropollutant by in-situ nanofiltration membrane modification for water treatment

Mei An (UGent) , Leonardo Gutierrez (UGent) , Arnout D'Haese (UGent) , Rino Morent (UGent) , Nathalie De Geyter (UGent) and Emile Cornelissen (UGent)
(2025) JOURNAL OF ENVIRONMENTAL MANAGEMENT. 380.
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Abstract
Nanofiltration (NF) membranes are recognized for their potential in removing organic micropollutants (OMPs). However, the limited efficiency of commercial NF membranes in removing small and neutral emerging OMPs has impeded its wide use. This study explores the effectiveness of in-situ modification of commercial NF270 membranes using two monomers for the removal of 1H-benzotriazole (BTA). For the first time, this work investigates the physicochemical properties of commercial NF270 membranes grafted with these two monomers, 3-(trimethoxysilyl)propyl methacrylate and 2-(diethylamino)ethyl methacrylate, using different surface characterization techniques. The study also evaluates the performance of both unmodified and modified membranes in the rejection of BTA and compares the results with state-of-the-art monomers. The 2-(diethylamino)ethyl methacrylate-grafted membranes show a modest enhancement of 12 % in BTA rejection. In contrast, the 3-(trimethoxysilyl)propyl methacrylate-modified membranes exhibit a remarkable 107 % improvement in BTA rejection compared to the virgin NF270 membrane, achieving the highest increase in OMP removal among current state-of-the-art monomer-modified membranes reported in previous research. This approach effectively removes BTA primarily through the mechanisms of size exclusion and hydrophobic interactions. This research presents a comprehensive strategy for surface modification of NF membranes, offering potential improvements in the rejection of small and neutral OMPs for water treatment.
Keywords
Rejection, Nanofiltration, In-situ modification, Organic micropollutants, Energy consumption, Water treatment, REVERSE-OSMOSIS MEMBRANES, COMPOSITE POLYAMIDE RO, PHYSIOCHEMICAL PROPERTIES, COATING LAYER, REMOVAL, FTIR, CHEMISTRY, XPS

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MLA
An, Mei, et al. “Rejection of an Emerging Small Neutral Organic Micropollutant by In-Situ Nanofiltration Membrane Modification for Water Treatment.” JOURNAL OF ENVIRONMENTAL MANAGEMENT, vol. 380, 2025, doi:10.1016/j.jenvman.2025.125052.
APA
An, M., Gutierrez, L., D’Haese, A., Morent, R., De Geyter, N., & Cornelissen, E. (2025). Rejection of an emerging small neutral organic micropollutant by in-situ nanofiltration membrane modification for water treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT, 380. https://doi.org/10.1016/j.jenvman.2025.125052
Chicago author-date
An, Mei, Leonardo Gutierrez, Arnout D’Haese, Rino Morent, Nathalie De Geyter, and Emile Cornelissen. 2025. “Rejection of an Emerging Small Neutral Organic Micropollutant by In-Situ Nanofiltration Membrane Modification for Water Treatment.” JOURNAL OF ENVIRONMENTAL MANAGEMENT 380. https://doi.org/10.1016/j.jenvman.2025.125052.
Chicago author-date (all authors)
An, Mei, Leonardo Gutierrez, Arnout D’Haese, Rino Morent, Nathalie De Geyter, and Emile Cornelissen. 2025. “Rejection of an Emerging Small Neutral Organic Micropollutant by In-Situ Nanofiltration Membrane Modification for Water Treatment.” JOURNAL OF ENVIRONMENTAL MANAGEMENT 380. doi:10.1016/j.jenvman.2025.125052.
Vancouver
1.
An M, Gutierrez L, D’Haese A, Morent R, De Geyter N, Cornelissen E. Rejection of an emerging small neutral organic micropollutant by in-situ nanofiltration membrane modification for water treatment. JOURNAL OF ENVIRONMENTAL MANAGEMENT. 2025;380.
IEEE
[1]
M. An, L. Gutierrez, A. D’Haese, R. Morent, N. De Geyter, and E. Cornelissen, “Rejection of an emerging small neutral organic micropollutant by in-situ nanofiltration membrane modification for water treatment,” JOURNAL OF ENVIRONMENTAL MANAGEMENT, vol. 380, 2025.
@article{01JQSAAWXGS8RM0AVRQY2YXS04,
  abstract     = {{Nanofiltration (NF) membranes are recognized for their potential in removing organic micropollutants (OMPs). However, the limited efficiency of commercial NF membranes in removing small and neutral emerging OMPs has impeded its wide use. This study explores the effectiveness of in-situ modification of commercial NF270 membranes using two monomers for the removal of 1H-benzotriazole (BTA). For the first time, this work investigates the physicochemical properties of commercial NF270 membranes grafted with these two monomers, 3-(trimethoxysilyl)propyl methacrylate and 2-(diethylamino)ethyl methacrylate, using different surface characterization techniques. The study also evaluates the performance of both unmodified and modified membranes in the rejection of BTA and compares the results with state-of-the-art monomers. The 2-(diethylamino)ethyl methacrylate-grafted membranes show a modest enhancement of 12 % in BTA rejection. In contrast, the 3-(trimethoxysilyl)propyl methacrylate-modified membranes exhibit a remarkable 107 % improvement in BTA rejection compared to the virgin NF270 membrane, achieving the highest increase in OMP removal among current state-of-the-art monomer-modified membranes reported in previous research. This approach effectively removes BTA primarily through the mechanisms of size exclusion and hydrophobic interactions. This research presents a comprehensive strategy for surface modification of NF membranes, offering potential improvements in the rejection of small and neutral OMPs for water treatment.}},
  articleno    = {{125052}},
  author       = {{An, Mei and Gutierrez, Leonardo and D'Haese, Arnout and Morent, Rino and De Geyter, Nathalie and Cornelissen, Emile}},
  issn         = {{0301-4797}},
  journal      = {{JOURNAL OF ENVIRONMENTAL MANAGEMENT}},
  keywords     = {{Rejection,Nanofiltration,In-situ modification,Organic micropollutants,Energy consumption,Water treatment,REVERSE-OSMOSIS MEMBRANES,COMPOSITE POLYAMIDE RO,PHYSIOCHEMICAL PROPERTIES,COATING LAYER,REMOVAL,FTIR,CHEMISTRY,XPS}},
  language     = {{eng}},
  pages        = {{11}},
  title        = {{Rejection of an emerging small neutral organic micropollutant by in-situ nanofiltration membrane modification for water treatment}},
  url          = {{http://doi.org/10.1016/j.jenvman.2025.125052}},
  volume       = {{380}},
  year         = {{2025}},
}
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