Pilot-Scale Thermal Destruction of Per- and Polyfluoroalkyl Substances in a Legacy Aqueous Film Forming Foam.

Autor:	Shields EP; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Krug JD; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Roberson WR; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Jackson SR; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Smeltz MG; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Allen MR; Jacobs Technology Inc., Cary, NC, 27518, USA., Preston Burnette R; Jacobs Technology Inc., Cary, NC, 27518, USA., Nash JT; Jacobs Technology Inc., Cary, NC, 27518, USA., Virtaranta L; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Preston W; CSS Inc., Durham, NC, 27713,USA., Liberatore HK; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Ariel Geer Wallace M; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Ryan JV; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Kariher PH; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Lemieux PM; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Solutions and Emergency Response, Homeland Security and Materials Management Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA., Linak WP; U.S. Environmental Protection Agency, Office of Research and Development, Center for Environmental Measurement and Modeling, Air Methods and Characterization Division, 109 T.W. Alexander Dr., Research Triangle Park, NC, 27711, USA.
Jazyk:	angličtina
Zdroj:	ACS ES&T engineering [ACS ES T Eng] 2023 Jun 01; Vol. 3 (9), pp. 1308-1317.
DOI:	10.1021/acsestengg.3c00098
Abstrakt:	The destruction of per- and polyfluoroalkyl substances (PFAS) is critical to ensure effective remediation of PFAS contaminated matrices. The destruction of hazardous chemicals within incinerators and other thermal treatment processes has historically been determined by calculating the destruction efficiency (DE) or the destruction and removal efficiency (DRE). While high DEs, >99.99%, are deemed acceptable for most hazardous compounds, many PFAS can be converted to other PFAS at low temperatures resulting in high DEs without full mineralization and the potential release of the remaining fluorocarbon portions to the environment. Many of these products of incomplete combustion (PICs) are greenhouse gases, most have unknown toxicity, and some can react to create new perfluorocarboxylic acids. Experiments using aqueous film forming foam (AFFF) and a pilot-scale research combustor varied the combustion environment to determine if DEs indicate PFAS mineralization. Several operating conditions above 1090 °C resulted in high DEs and few detectable fluorinated PIC emissions. However, several conditions below 1000 °C produced DEs >99.99% for the quantifiable PFAS and mg/m 3 emission concentrations of several non-polar PFAS PICs. These results suggest that DE alone may not be the best indication of total PFAS destruction, and additional PIC characterization may be warranted.
Databáze:	MEDLINE
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