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Molecules 2019, 24(6), 1039; https://doi.org/10.3390/molecules24061039

Evidence for the Formation of Difluoroacetic Acid in Chlorofluorocarbon-Contaminated Ground Water

Bundesanstalt für Materialforschung und -prüfung, BAM, 12489 Berlin, Germany
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Academic Editor: Matthias Koch
Received: 20 February 2019 / Revised: 7 March 2019 / Accepted: 12 March 2019 / Published: 15 March 2019
(This article belongs to the Special Issue Investigation of Transformation Products of Organic Compounds)
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Abstract

The concentrations of difluoroacetic acid (DFA) and trifluoroacetic acid (TFA) in rainwater and surface water from Berlin, Germany resembled those reported for similar urban areas, and the TFA/DFA ratio in rainwater of 10:1 was in accordance with the literature. In contrast, nearby ground water historically contaminated with 1,1,2-trichloro-1,2,2-trifluoroethane (R113) displayed a TFA/DFA ratio of 1:3. This observation is discussed versus the inventory of microbial degradation products present in this ground water along with the parent R113 itself. A microbial transformation of chlorotrifluoroethylene (R1113) to DFA so far has not been reported for environmental media, and is suggested based on well-established mammalian metabolic pathways.
Keywords: fluoroacetic acid; DFA; TFA; rainwater; ground water; degradation of refrigerants fluoroacetic acid; DFA; TFA; rainwater; ground water; degradation of refrigerants
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dorgerloh, U.; Becker, R.; Kaiser, M. Evidence for the Formation of Difluoroacetic Acid in Chlorofluorocarbon-Contaminated Ground Water. Molecules 2019, 24, 1039.

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