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Membranes 2019, 9(2), 28; https://doi.org/10.3390/membranes9020028

In Situ Modification of Reverse Osmosis Membrane Elements for Enhanced Removal of Multiple Micropollutants

1
Technion—Israel Institute of Technology, Wolfson Department of Chemical Engineering, Technion City, Haifa 32000, Israel
2
The Galilee Society, Institute of Applied Research, P.O. Box 437, Shefa-amr 20200, Israel
*
Authors to whom correspondence should be addressed.
Received: 10 January 2019 / Revised: 7 February 2019 / Accepted: 11 February 2019 / Published: 13 February 2019
(This article belongs to the Special Issue Reverse Osmosis Membranes)
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PDF [2004 KB, uploaded 13 February 2019]
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Abstract

Reverse osmosis (RO) membranes are widely used for desalination and water treatment. However, they insufficiently reject some small uncharged micropollutants, such as certain endocrine-disrupting, pharmaceutically active compounds and boric acid, increasingly present in water sources and wastewater. This study examines the feasibility of improving rejection of multiple micropollutants in commercial low-pressure RO membrane elements using concentration polarization- and surfactant-enhanced surface polymerization. Low-pressure membrane elements modified by grafting poly(glycidyl methacrylate) showed enhanced rejection of all tested solutes (model organic micropollutants, boric acid, and NaCl), with permeability somewhat reduced, but comparable with commercial brackish water RO membranes. The study demonstrates the potential and up-scalability of grafting as an in situ method for improving removal of various classes of organic and inorganic micropollutants and tuning performance in RO and other dense composite membranes for water purification. View Full-Text
Keywords: in situ membrane modification; micropollutant removal; boron removal; spiral wound elements; reverse osmosis in situ membrane modification; micropollutant removal; boron removal; spiral wound elements; reverse osmosis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Baransi-Karkaby, K.; Bass, M.; Freger, V. In Situ Modification of Reverse Osmosis Membrane Elements for Enhanced Removal of Multiple Micropollutants. Membranes 2019, 9, 28.

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