Overview of Remediation Technologies for PFAS-Contaminated Groundwater
Tuesday, August 8, 2017: 1:35 p.m.
This presentation will provide an overview of current and promising remediation technologies to treat PFAS-contaminated groundwater. To date, only ex situ conventional technologies such as pumping PFAS-contaminated groundwater with aboveground treatment by granular activated carbon (GAC) have been selected for use. Other aboveground treatment technologies such as ion exchange adsorption, reverse osmosis, and nanofiltration have the potential to replace GAC or be used with GAC to remove a broader range of PFASs from groundwater. And proprietary adsorbents are being marketed as alternatives or compliments to GAC. More novel ex situ technologies such as sonochemical treatment show promising results in bench-scale research. Chemical oxidation and reduction are also promising with bench-scale work showing the potential to degrade some PFASs. Additional work is being conducted to develop these chemical-based degradation technologies for the in situ treatment of PFAS-contaminated sites. Unfortunately, aerobic bioremediation is not likely to be applicable for PFASs with studies reporting that perfluorinated compounds are resistant to microbial degradation. Microbiological degradation of PFASs under anaerobic conditions is an underdeveloped area of research that warrants additional study.