Session Details

Session 6: Responses to PFAS/PFOA

Abstract Number:

68

PFAS have historically been used across a broad range of industries ‎for a wide variety of applications, but are ‎highly refractory and ‎bio-accumulative and have the potential to cause numerous ‎adverse health effects. ‎Faraday has demonstrated a pulsed-‎waveform electrocatalysis approach for PFAS destruction with ‎clearly ‎superior performance to direct-current methods using ‎state-of-the-art boron-doped diamond catalysts. Cost ‎analysis ‎suggests the pulsed waveform approach has the potential to ‎provide appreciable reductions in OPEX ‎and favorable overall ‎CAPEX/OPEX.‎

Topics:

Managing Water Usage/Waste Management Minimization,
Technology Responses to REACh/Regulations

This talk will present recent progress toward development of an economical and energy-‎efficient processes to pretreat waste streams for removal of per-/polyfluorinated alkyl ‎species (PFAS). PFAS have historically been used across a wide variety of applications, ‎including carpeting, apparel, upholstery, metal plating and firefighting foams. However, ‎research has demonstrated that these compounds are highly refractory and bio-‎accumulative when released to the environment, and have the potential to cause adverse ‎health effects, such as low birth weight, accelerated puberty, cancer, and skeletal, liver, ‎kidney and other problems. Thus, multiple regulatory agencies, including the U.S. and ‎various state EPAs, are in the process of defining actionable maximum contaminant limits for ‎numerous PFAS.‎

Existing state-of-the-art treatment techniques such as sorption by activated carbon work to ‎remove PFAS in certain circumstances, but are extremely costly, often cannot be used for ‎waste streams with complex composition, and ultimately only postpone the disposal ‎challenge as the PFAS-laden media itself becomes a waste stream requiring treatment. Thus, ‎it is desirable to develop an energy and cost-efficient technology for ‎degradation/destruction of PFAS in various industrial waste streams, landfill leachates, soil-‎derived streams, etc., to provide a final disposal/treatment solution. Faraday is working to ‎demonstrate a pulsed-waveform electrocatalysis approach for PFAS destruction with clearly ‎superior performance to direct-current methods, enhancing destruction of more-challenging ‎short-chain PFAS and enabling PFAS destruction even in complex matrices. Cost analysis ‎estimates indicate that the use of pulsed waveforms has the potential to provide ‎appreciable reductions in OPEX, providing a combined preliminary CAPEX/OPEX cost ‎structure that appears favorable for deployment of this technology for destruction of PFAS in ‎various streams, including drinking water, electroplating rinse waters, landfill leachates and ‎soil/groundwater.‎

ELECTROCHEMICAL REMEDIATION OF PFAS-CONTAMINATED ‎AQUEOUS WASTE STREAMS