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Elucidating the relationship between PFOA and PFOS destruction, particle size and electron generation in amended media commonly found in soils by Lauren P. Turner; Bernard H. Kueper; David J. Patch; Kela P. Weber is a Environmental Science article available to read on EtoBox.

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Ball milling has emerged as a promising destructive technique for treating per- and polyfluoroalkyl substances (PFAS)-impacted soils. Environmental media properties such as reactive species generated upon ball milling and particle size are postulated to influence the effectiveness of the technology. In this study, four media types amended with perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were planetary ball milled to investigate destruction, fluoride recovery without additional co-milling reagents and the relationship between PFOA and PFOS destruction, particle size during milling, and electron generation. Silica sand, nepheline syenite sand, calcite and marble were sieved to achieve similar initial particle sizes (6/35 distribution), amended with PFOA and PFOS, and milled for 4 h. Particle size analysis was conducted throughout milling and 2,2-diphenyl-1-picrylhydrazyl (DPPH•) was used as a radical scavenger to assess electron generation from the four media types. Particle size reduction was observed to be positively correlated to PFOA and PFOS destruction and DPPH• neutralization (demonstrating electron generation by milling) in silica sand and nepheline sye

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Author

Lauren P. Turner; Bernard H. Kueper; David J. Patch; Kela P. Weber

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Environmental Science (Physical Sciences)