Polyamide membranes are subject to deterioration by the chlorine added to the feed water. A more robust membrane would theoretically tolerate higher concentrations of chlorine without chemical damage. The current polyamide thin film membrane is made by an interfacial reaction between the reactant pair trimesoyl chloride (TMC) and mphenylenediamine (MPD). Work has been done in modifying this chemistry by replacing the monomers TMC and MPD, with other acid chlorides and amines. NMR, MS and MALDI-TOF are some of the instruments used to analyze the newly created monomers. If favorable, these monomers are starting compounds for new membranes. Successful
new membranes are then treated with chlorine and transport properties measured both before and after chlorination. Successful candidates are evaluated for long-term testing. This is ongoing research at Separation Systems Technology Inc., the Bureau of Reclamation, and the University of Denver.
This presentation is available to AMTA Members only.
- Yuliana Porras-Mendoza
- US Bureau of Reclamation
- AMTA Biennial Conference, Las Vegas, NV
- Biennial Conference
- Chlorine Resistant Polyamide Reverse Osmosis Membranes, Bureau of Reclamation, University of Denver, Water Quality Improvement Center in Yuma, AZ