AWWA ACE62999

This slide presentation outlines a study on micropollutant rejection by high pressure reverse osmosis (RO) and nanofiltration (NF) membranes. Part 1 presents the rejection of anionic inorganic micropollutantsby negatively charged membranes includingchromate,perchlorate,and arsenate. Part 1 Hypotheses involvesmembrane properties enhancing rejection include lower MWCO andgreater (negative) surface charge. Part 2 presentsrejection of trace organic micropollutantsby NFand RO:compound versus membrane properties. Part 2 Hypotheses - Most Past Studies Have Often OverestimatedRejections due to Short Time Frame of Tests,not Allowing for Pre-Saturation of Membrane;Compound Transport through Membrane IsDictated by Solute-Membrane Interactions(Steric, Electrostatic, and Partitioning); and, Partitioning (either Hindered or Facilitated)Embodies Solute-Membrane Affinity,Solute Diffusion through, and Solubility in, theMembrane. Includes tables, figures.

Product Details

Edition:

Vol. - No.

Published:

06/01/2006

Number of Pages:

44

File Size:

1 file , 3.4 MB