Available conventional water treatment systems and methods to remove PFAS from water have some shortcomings. Granular activated carbon adsorption systems and methods used to remove PFAS from water, for example, have been shown to be effective on the longer-chain PFAS, but are less effective in removing shorter chain compounds.
Similar to activated carbon, some conventional anion exchange resins may be more effective at treating longer chain PFAS than the shorter chain compounds. Other anion exchange resins have shown some success in removing a broader range of PFAS, including shorter-chain compounds. However, removal of the PFAS to recover the ion exchange resins for re-use can be difficult. In addition, these sorbents have deficiencies when used to remediate well and river waters. For example, PFAS concentrations in these waters are usually orders-of-magnitude lower than background constituents, such as natural organic matter (NOM) and metal ions, which compete with PFAS for sorption sites with the result that effective removal of PFAS is difficult. There is a critical need, therefore, to develop PFAS sorbents that exhibit rapid PFAS removal of all chain lengths followed by facile regeneration of the sorbents and release of the PFAS in more concentrated forms.
We have a family of cross-linked polymeric compounds (described in more detail in our recently filed U.S. patent application) that are capable of rapid PFAS removal of all chain lengths and facile regeneration through de-sorption. Contact us to learn more.