In the scientific report “Impacts of Groundwater Constituents and Colloidal Activated Carbon (CAC) Surface Chemistry on the Adsorption of Perfluoroalkyl Acids (PFAA) in Aqueous Film-Forming Foam (AFFF)-Impacted Groundwater,” GW Engineering’s Xitong Liu, an associate professor of civil and environmental engineering, contributed to research on remediating PFAS-contaminated groundwater using colloidal activated carbon (CAC). Working with academic and industry collaborators, Liu helped advance understanding of CAC barrier design and implementation.
Here is an excerpt from the study abstract: “In situ sequestration of per- and polyfluorinated alkyl substances (PFAS) using colloidal activated carbon (CAC) is a growing technology at aqueous film-forming foam (AFFF)-impacted sites, but its long-term effectiveness remains uncertain due to complex groundwater chemistry. Perfluoralkyl acid (PFAA) adsorption was quantified in four groundwaters collected from AFFF-impacted sites using two CAC materials.”
Read the full study in ACS ES&T Water.