Field-Scale Demonstration of PFAS Leachability Following In Situ Soil Stabilization.

Autor:	McDonough JT; Arcadis, 630 Plaza Drive Suite 200, Highlands Ranch, Colorado 80129, United States., Anderson RH; Air Force Civil Engineer Center (AFCEC), San Antonio, Texas 78056, United States., Lang JR; Arcadis, 630 Plaza Drive Suite 200, Highlands Ranch, Colorado 80129, United States., Liles D; Arcadis, 630 Plaza Drive Suite 200, Highlands Ranch, Colorado 80129, United States., Matteson K; Arcadis, 630 Plaza Drive Suite 200, Highlands Ranch, Colorado 80129, United States., Olechiw T; Arcadis, 630 Plaza Drive Suite 200, Highlands Ranch, Colorado 80129, United States.
Jazyk:	angličtina
Zdroj:	ACS omega [ACS Omega] 2021 Dec 27; Vol. 7 (1), pp. 419-429. Date of Electronic Publication: 2021 Dec 27 (Print Publication: 2022).
DOI:	10.1021/acsomega.1c04789
Abstrakt:	A field-scale validation is summarized comparing the efficacy of commercially available stabilization amendments with the objective of mitigating per- and polyfluoroalkyl substance (PFAS) leaching from aqueous film-forming foam (AFFF)-impacted source zones. The scope of this work included bench-scale testing to evaluate multiple amendments and application concentrations to mitigate PFAS leachability and the execution of field-scale soil mixing in an AFFF-impacted fire-training area with nearly 2.5 years of post-soil mixing monitoring to validate reductions in PFAS leachability. At the bench scale, several amendments were evaluated and the selection of two amendments for field-scale evaluation was informed: FLUORO-SORB Adsorbent (FS) and RemBind (RB). Five ∼28 m 3 test pits (approximately 3 m wide by 3 m long by 3 m deep) were mixed at a site using conventional construction equipment. One control test pit (Test Pit 1) included Portland cement (PC) only (5% dry weight basis). The other four test pits (Test Pits 2 through 5) compared 5 and 10% ratios (dry weight basis) of FS and RB (also with PC). Five separate monitoring events included two to three sample cores collected from each test pit for United States Environmental Protection Agency (USEPA) Method 1315 leaching assessment. After 1 year, a mass balance for each test pit was attempted comparing the total PFAS soil mass before, during, and after leach testing. Bench-scale and field-scale data were in good agreement and demonstrated >99% decrease in total PFAS leachability (mass basis; >98% mole basis) as confirmed by the total oxidizable precursor assay, strongly supporting the chemical stabilization of PFAS. Competing Interests: The authors declare no competing financial interest. (© 2021 The Authors. Published by American Chemical Society.)
Databáze:	MEDLINE
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