期刊
MEMBRANES
卷 9, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/membranes9020028
关键词
in situ membrane modification; micropollutant removal; boron removal; spiral wound elements; reverse osmosis
类别
资金
- Israel Water Authority [4500687020]
- United States-Israel Binational Agricultural Research and Development Fund (BARD) [US-4654-13]
- Israel Ministry of Science Technology and Space
- Rieger Foundation Jewish National Fund for the fellowship in Environmental Studies
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.
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