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1:30pm to 3:00pm |
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"Chlorine Disinfectant Resistant Anti fouling Reverse Osmosis Water Purification Membranes"
(Seminar/Conference)
seminar by Dr. Jim McGrath / Virginia Tech
Disulfonated poly(arylene ether sulfone)copolymers(BPS) are promising chlorine resistant reverse osmosis(RO) materials. Unlike commercial aromatic polyamide (PA) membranes, they do not contain the vulnerable amide bond that is susceptible to disinfectant attack. The sulfonate ions on the membrane afford hydrophilic behavior and good salt rejection. These membranes showed excellent resistance against compaction, hydrolysis and degradation and exhibited good flux and rejection characteristics. Others have reported sulfonated polysulfone hollow fiber membranes with constant flux and salt rejection even after exposure to 100 ppm chlorine in feed water. However, all of these membranes were post-sulfonated using
chlorosulfonic acid or concentrated sulfuric acid, and undesirable side reactions as well as poor quantitative
reproducibility were encountered. More information...
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