Cited by 236Per- and polyfluoroalkyl substances researchWater Treatment and DisinfectionPharmaceutical and Antibiotic Environmental Impacts

Small, mobile, persistent: Trifluoroacetate in the water cycle – Overlooked sources, pathways, and consequences for drinking water supply

Scheurer, Marco, Nödler, Karsten, Freeling, Finnian, Janda, Joachim, Happel, Oliver, Riegel, Marcel, Müller, Uwe, Storck, Florian Rüdiger +4 more·2017·Water Research

Abstract

Elevated concentrations of trifluoroacetate (TFA) of more than 100 μg/L in a major German river led to the occurrence of more than 20 μg/L TFA in bank filtration based tap waters. Several spatially resolved monitoring programs were conducted and discharges from an industrial company were identified as the point source of TFA contamination. Treatment options for TFA removal were investigated at full-scale waterworks and in laboratory batch tests. Commonly applied techniques like ozonation or granulated activated carbon filtration are inappropriate for TFA removal, whereas TFA was partly removed by ion exchange and completely retained by reverse osmosis. Further investigations identified wastewater treatment plants (WWTPs) as additional TFA dischargers into the aquatic environment. TFA was neither removed by biological wastewater treatment, nor by a retention soil filter used for the treatment of combined sewer overflows. WWTP influents can even bear a TFA formation potential, when appropriate CF 3 -containing precursors are present. Biological degradation and ozonation batch experiments with chemicals of different classes (flurtamone, fluopyram, tembotrione, flufenacet, fluoxetine, sitagliptine and 4:2 fluorotelomer sulfonate) proved that there are yet overlooked sources and pathways of TFA, which need to be addressed in the future.

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Crossref · 10.1016/j.watres.2017.09.045

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  • Given no PFAS manufacturing in Serbia, plausible contributors to elevated TFA include emissions from industrial and pharmaceutical uses, agricultural application of C-CF3-containing plant protection products, and secondary atmospheric formation through degradation of volatile fluorinated precursors and refrigerant gases.

    “Given that there is no PFAS manufacturing in Serbia, plausible contributors include emissions from industrial and pharmaceutical uses, agricultural application of C–CF3-containing plant protection products, and secondary atmospheric formation through degradation of volatile fluorinated precursors and refrigerant gases [39,40,41].”
  • Studies on degradation by microbiota have not shown any evidence of TFA being susceptible to microbiological degradation.

    “Studies on degradation by microbiota, including species and strains from contaminated areas, have not shown any evidence of TFA being susceptible to microbiological degradation [202, 203].”
  • TFA can be formed from some fluoro-pharmaceuticals during treatment of water with O3; the molar yield of TFA from fluoxetine solutions treated with O3 at 4 mg L−1 was as large as 40%.

    “TFA can also be formed from some fluoro-pharmaceuticals during treatment of water with O3. The molar yield of TFA from fluoxetine solutions treated with O3 at 4 mg L−1 was as large as 40% [202].”
  • Ozonation of solutions of mesotrione, flufenacet, flurtamone, and fluopyram at 100 μg L−1 for 5-60 min resulted in 5, 20, 43, and 32% production of TFA on a molar basis.

    “For example, ozonation (4 mg L−1) of solutions of trembotrione (mesotrione, CAS# 104,206-82-8), flufenacet (CAS# 142,459-58-3), flurtamone (CAS# 96,525-23-4), and fluopyram (CAS# 658,066–35-4) at 100 µg L−1 for times between 5 and 60 min resulted in 5, 20, 43, and 32% production of TFA on a molar basis [Fig. 7 in 202].”

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Authors
Scheurer, M., Nödler, K., Freeling, F., Janda, J., Happel, O., Riegel, M., Müller, U., Storck, F. R., Fleig, M., Lange, F. T., Brunsch, A., & Brauch, H.-J.
Affiliations
DVGW - Technologiezentrum Wasser (DE)
Corresponding author
Scheurer, Marco
Venue
Water Research
Publisher
Elsevier BV
Published
2017-12
Volume
126
Pages
460-471
ISSN
0043-1354 (ISSN-L)
OpenAlex
W2757297597
Cited by
234
References
39
Citations by year
2026: 69 · 2025: 40 · 2024: 28 · 2023: 23 · 2022: 18 · 2021: 17 · 2020: 14 · 2019: 18 · 2018: 5 · 2017: 1
FWCI
6.11
Type
journal article
Language
en
Open access
closed
Locations
  • Water Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
Bundesministerium für Bildung und Forschung (02WIL138)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Water Treatment and Disinfection
  • Physical Sciences › Environmental Science › Pollution › Pharmaceutical and Antibiotic Environmental Impacts
Keywords
trifluoroacetate, PFAS, drinking water contamination, bank filtration, industrial discharge, wastewater treatment plants, combined sewer overflows, ion exchange, reverse osmosis, ozonation, granular activated carbon, biodegradation, flufenacet, fluoxetine, fluopyram, tembotrione, fluorotelomer sulfonates, water cycle, river water quality
MeSH terms
Charcoal, Environmental Monitoring, Filtration, Ion Exchange, Ozone, Soil, Trifluoroacetic Acid, Water Pollutants, Chemical, Water Supply, Water Purification, Rivers, Halogenation, Water Cycle, Drinking Water

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