Treatment Mitigation Strategies for Poly- and Perfluorinated Chemicals
This webcast presented the results of WRF project 4322, Treatment Mitigation Strategies for Poly- and Perfluoroalkyl Substances. Poly- and perfluoroalkyl substances (PFASs, also known as perfluorinated chemicals or PFCs) are a group of manmade chemicals with past and current uses in industrial processes and consumer products. The most notable PFASs are perfluorooctanoic acid (PFOA or C8) and perfluorooctane sulfonate (PFOS), but there are many others. PFASs are water-soluble and commonly detected in drinking water sources via industrial releases, releases of aqueous film-forming foams in training for and fighting fuel fires, discharges from wastewater treatment plants, street and storm water runoff, and the land application of biosolids.
The objectives of WRF project 4322 were to conduct a literature review and evaluate the ability of a wide spectrum of full-scale water treatment techniques to remove PFASs from contaminated raw water or potable reuse sources. Systems evaluated included conventional and advanced technologies, such as ferric and alum coagulation, granular/micro-/ultrafiltration, aeration, oxidation (i.e., permanganate, ultraviolet/advanced oxidation with hydrogen peroxide), disinfection (i.e., ozonation, chlorine dioxide, chlorination, and chloramination), granular activated carbon (GAC), anion exchange (AIX), reverse osmosis (RO), dissolved air flotation, and riverbank filtration. The 4322 report is available for download on the WRF website.