Session 6: Responses to PFAS/PFOA
This presentation will the results of PFAS destruction using a REM; Reactive Electrochemical Membrane within the context of total PFAS conversion and energy consumption. The technology will also be reviewed as it relates to the regulatory uncertain of PFAS.
Managing Waste Uses / Responses to REACh
Per- and polyfluoroalkyl substances (PFASs) have been used in metal finishing and electroplating applications, due to their ability to act as a mist suppressant. These compounds are highly toxic and therefore require appropriate treatment. The overall objective of this work was to utilize a cost-effective reactive electrochemical membrane (REM) for the electrochemical destruction of PFASs from synthetic and real electroplating wastewater. Experimental work investigated the effect of potential and flow rate on PFAS oxidation with a Ti4O7 REM. It was determined that high electrode potentials (> 3.0 V/SHE) and low flow rates achieved significant conversion of PFAS in synthetic solutions, but conversion was significantly affected by constituents found in electroplating wastewater and resulted in increased energy usage. A preconcentration strategy of PFAS before electrochemical oxidation was investigated to overcome these challenges, and the results will be discussed in context of total PFAS conversion and energy consumption. Results from this work will also be discussed in terms of further development of this technology in the face of regulatory uncertainty of PFAS.