Over the past two decades, per- and polyfluoroalkyl substances (PFAS) have emerged as worldwide environmental contaminants, calling out for sophisticated treatment, decomposition and remediation strategies. In order to mineralize PFAS pollutants, the incineration of contaminated material is a state-of-the-art process, but more cost-effective and sustainable technologies are inevitable for the future. Within this review, various methods for the reductive defluorination of PFAS are inspected and described. In addition to this, the role of mechanochemistry is highlighted regarding its major potential in reductive defluorination reactions and degradation of pollutants. In order to obtain a comprehensive understanding of the involved reactions, their mechanistic pathways are pointed out. Comparisons between existing PFAS decomposition reactions and reductive approaches are discussed in detail, regarding their applicability in possible remediation processes. This article provides a solid overview of the most recent research methods and offers guidelines for future research directions.
Reductive Defluorination and Mechanochemical Decomposition of Per- and Polyfluoroalkyl Substances (PFASs): From Present Knowledge to Future Remediation Concepts
Philipp Roesch, Christian Vogel, Franz-Georg Simon
published in International Journal of Environmental Research and Public Health, Vol. 17, issue 19, page 7242, 2020
BAM Contaminant Transport and Environmental Technologies division