Webinar | Reductive Defluorination Of PFAS Using An Ultraviolet Light Photochemical Reactor

Overview

Join us for our next webinar on August 13th at 12:30 EST, focusing on “Reductive Defluorination Of PFAS Using An Ultraviolet Light Photochemical Reactor.”

Background/Objectives

Per and polyfluoroalkyl substances (PFAS) are a class of anthropogenic chemicals used in industrial and commercial products since the 1950s. Research has identified several links between PFAS exposure and adverse health outcomes. While several technologies exist that are capable of removing PFAS from water, these result in the generation of a secondary, highly concentrated waste stream that often requires disposal at a landfill or encapsulation. The objective of our work is to develop a chemical reduction process using ultraviolet (UV)
light and synergistic photosensitive chemicals to destroy PFAS in a variety of aqueous matrices.

Approach/Activities

Through laboratory research, Parsons has identified the optimal chemical and engineering developments required to achieve destruction of PFAS in a flow-through operation mode under a wide range of diverse water chemistries. Following excitation by UV light, iodide and sulfite under alkaline conditions generates a highly reducing environment which uses reducing radicals, like the aqueous electron, to facilitate PFAS destruction. Parsons has
confirmed that complete PFAS destruction is achieved through the complete recovery and analysis of inorganic fluoride. Complete PFAS destruction has been maintained in the presence of different co-contaminants, including salts, metals, and organic compounds.

Results/Lessons Learned

Catalyzed UV has the potential to achieve complete PFAS destruction under a broad range of environmental conditions. Laboratory demonstrations using real-world, highly complex samples have identified the robustness of Catalyzed UV, providing a deeper understanding of the underlying PFAS destruction mechanisms and ideal application conditions.

About The Presenter

Natalia is a research and development scientist with experience in PFAS remediation. She has five years of experience in environmental research and development, focusing on the characterization and destruction of organic pollutants, including PFAS.

To Join The Webinar

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Please visit the Parsons YouTube channel where video recordings of our previous technical webinars are available for viewing.