REJECTION OF EMERGING ORGANIC MICROPOLLUTANTS IN NANOFILTRATION/REVERSE OSMOSIS MEMBRANE APPLICATIONS
Abstract:This study aimed to investigate factors affecting the rejection of emerging trace organics by a variety of commercial reverse osmosis (RO), nanofiltration (NF), and ultra-low pressure RO membranes during laboratory-scale experiments. Findings of this study indicated that rejection of negatively charged organics was driven by a combination of steric and electrostatic exclusion, which was independent of feed water recovery but affected by the presence of effluent organic matter (EfOM). Feed water recovery or EfOM did not affect the rejection of hydrophilic non-ionic solutes and removal was only driven by steric exclusion. Hydrophobic non-ionic compounds exhibited a high initial rejection due to hydrophobic/hydrophobic interactions and steric exclusion but rejection decreased significantly after 5 hours of operation due to partitioning of solutes through the membrane. Findings of this study imply that ULPRO and NF membranes, operated at lower feed pressure, perform similar to conventional RO membranes in removing trace organics of interest.
Document Type: Research Article
Publication date: 2004-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites