Cited by 111Per- and polyfluoroalkyl substances researchLandfill Environmental Impact StudiesEnvironmental Chemistry and Analysis

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Aerobic biotransformation of fluorotelomer compounds in landfill leachate-sediment

Hamid, Hanna, Li, Loretta Y., Grace, John R.·2020·Science of The Total Environment

DOI 10.1016/j.scitotenv.2020.136547

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Abstract

Consumer products containing fluorotelomer polymers are a source of fluorotelomer compounds to the environment following their disposal at landfills. The fate and transformation of fluorotelomer compounds are unknown in landfill leachates. This study investigates the aerobic biotransformation of 8:2 fluorotelomer alcohol (FTOH) and 6:2 fluorotelomer sulfonate (FTS) in landfill leachate-sediment microcosms using batch tests. Spiked 8:2 FTOH, 6:2 FTS and their known biotransformation products were quantified in sediment-leachate and headspace over 90 days under aerobic conditions. 8:2 FTOH and 6:2 FTS biotransformation was slow (half-life >>30 d) in landfill leachate-sediment microcosm, suggesting persistence of fluorotelomer compounds under the conditions investigated. Significant volatilization (>20%) of 8:2 FTOH was observed in the microcosm headspace after 90 days. C6 - C8 and C4 - C6 perfluorocarboxylic acids (PFCAs) were the most abundant products for 8:2 FTOH and 6:2 FTS, respectively. PFCAs accounted for 4-9 mol% of the initially spiked parent compounds at 90 days. Perfluorooctanoic acid (PFOA) was the single most abundant product of 8:2 FTOH (>2.8 mol% at 90 days). The unaccounted mass (20 to 35 mol%) of the initially spiked parent compounds indicated formation of fluorotelomer intermediates and sediment-bound residue. Overall the findings suggest that aerobic biotransformation of fluorotelomer compounds acts as a secondary source of long- and short-chain (≤C7) PFCAs in the environment. Partitioning of semi-volatile fluorotelomer compounds (e.g., 8:2 FTOH) to the gas-phase indicates possible long-range transport and subsequent release of PFCAs in pristine environments. Short-chain fluorotelomer replacements (e.g., 6:2 FTS) result in a higher abundance of short-chain PFCAs in landfill leachate. Future research is needed to understand the long-term exposure effects of short-chain PFCAs to humans, aquatic life and biota.

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See all 111

Authors: Hamid, H., Li, L. Y., & Grace, J. R.
Affiliations: University of British Columbia (CA)
Corresponding author: Li, Loretta Y.
ORCID: Li, Loretta Y.
Grace, John R.
Venue: Science of The Total Environment
Publisher: Elsevier BV
Published: 2020-04
Volume: 713
Pages: 136547
ISSN: 0048-9697 (ISSN-L)
DOI: 10.1016/j.scitotenv.2020.136547
OpenAlex: W2999983699
Cited by: 111
References: 91
Citations by year: 2026: 16 · 2025: 22 · 2024: 24 · 2023: 17 · 2022: 14 · 2021: 9 · 2020: 9
FWCI: 4.54
Type: journal article
Language: en
Open access: closed
Licence: www.elsevier.com/tdm/userlicense/1.0/ (tdm)
www.elsevier.com/legal/tdmrep-license (tdm)
doi.org/10.15223/policy-017 (stm-asf)
doi.org/10.15223/policy-037 (stm-asf)
doi.org/10.15223/policy-012 (stm-asf)
doi.org/10.15223/policy-029 (stm-asf)
doi.org/10.15223/policy-004 (stm-asf)
Locations: The Science of The Total Environment (publishedVersion)
PubMed (publishedVersion)
Funders: Schlumberger Foundation
Natural Sciences and Engineering Research Council of Canada (CGSD3-475849-2015)
Topics: Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
Physical Sciences › Environmental Science › Waste Management and Disposal › Landfill Environmental Impact Studies
Physical Sciences › Environmental Science › Environmental Chemistry › Environmental Chemistry and Analysis
Keywords: fluorotelomer alcohols, fluorotelomer sulfonates, aerobic biotransformation, landfill leachate, perfluorocarboxylic acids, perfluorooctanoic acid, volatilization, biotransformation products, long-range transport, microcosm
MeSH terms: Aerobiosis, Alkanesulfonates, Biotransformation, Fluorocarbons, Water Pollutants, Chemical, Biota, Waste Disposal Facilities

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Aerobic biotransformation of fluorotelomer compounds in landfill leachate-sediment

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