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AWWA MTC61186
- Rejection of Non-ionic Organic Micropollutants by Reverse Osmosis and Nanofiltration Membranes: Effect of Membrane Fouling
- Conference Proceeding by American Water Works Association, 03/01/2005
- Publisher: AWWA
$12.00$24.00
During long-term operation, the physical-chemical properties of high-pressure membranesurface can change as a result of membrane fouling, including surface charge,hydrophobicity, pore size and functionality. Bench-scale cross-flow flat sheet membraneunits were employed for membrane fouling and rejection tests to examine the transportof non-ionic trace organic pollutants through virgin and fouled membranes. The rejectionbehavior of non-ionic compounds changed significantly as a result of membrane fouling.A time-dependent rejection trend was observed for virgin membrane specimens but wasnot remarkable for fouled membranes. Membrane fouling resulted in an increasedrejection of non-ionic compounds and the rejection remained relatively constant overtime. The fouling layer increased the size exclusion effect and eliminated the adsorption,partition and diffusion of hydrophobic non-ionic solutes through the membrane. Includes 10 references, table, figures.
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