Session 6: Responses to PFAS/PFOA
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.
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.