- Patent pending
Professor Schlenoff and his team have developed an ion exchange resin associated with a polyelectrolyte that reduces the fouling of the ion exchange resins or renders it nonfouling. This without impacting the ion exchange capacity of resin, even when applied with an anion exchange resin.
Ion exchange resins (IERs) and membranes have been widely used for water treatment and purification processes. Anion exchange resins (AER) may be employed for the removal of natural organic matter (NOM), which typically is mostly anionic. However, the use of AERs has been limited, at least in part, by fouling. Typically, fouling is caused at least in part by organic substances, such as humic and fulvic acids, Resin fouling has been reported to cause capacity and performance losses especially during repeated uses in cyclic and long-term operations. A component of NOM in raw waters include algal cells and algae-derived precursors, which can cause water contamination by the formation of disinfection byproducts (DBPs). Resins are also used for water softening and demineralization. In these applications, the adsorption of pollutants and organic substances typically is unfavorable for the optimum performance of the deionizer. Ion exchange resins are usually continuously submerged in water, and thus subjected to the settlement of marine organisms, e.g. algal cells.