Graduate Research Assistant
Arizona State University
Rebecca Dietz is a second year PhD student in Environmental Engineering at Arizona State University. Rebecca received her Bachelor’s of Science in Chemical Engineering (2013) and her Master’s of Science in Chemical Engineering (2018) at Arizona State University.
Removal of Perfluoroalkyl Acids (PFAAs) Using Regenerable Resin Technology
Contamination of groundwater by perfluoroalkyl substances (PFAS) associated with aqueous film forming foams (AFFF) is of growing concern. These substances have been reported to bioaccumulate, causing adverse health effects in both humans and animals. With the increase of PFAS present in groundwater, this study will aim to evaluate ion exchange as an effective removal technology. Currently there is limited research focused PFAS adsorption onto ion exchange resin that has been converted to less corrosive mobile counter-ions such as sulfate or bicarbonate. Additionally, research on regeneration efficiency for these converted forms of ion exchange resin can still be explored. This column study evaluated 6 PFAS chemicals and their adsorption onto two regenerable anionic exchange resins converted to either sulfate or bicarbonate form. Furthermore, this study also evaluated the efficiency of three regenerants (salt aqueous solution, salt/solvent mixture and a salt/base brine mixture) to desorb PFAS and to regenerate this resin.