Aqueous film forming foam and associated perfluoroalkyl substances inhibit methane production and Co-contaminant degradation in an anaerobic microbial community

Fitzgerald, Nicole J. M.; Temme, Hanna R.; Simcik, Matt F.; Novak, Paige J.

doi:10.1039/c9em00241c

Cited by 15 publications

(13 citation statements)

References 38 publications

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“…Fitzgerald et al [ 2 ] reported that PFOS at a concentration of 50 mg L −1 was inhibitory to mixed anaerobic cultures from a seed digester, using sludge as electron donor. In this study, in the first 3 days of assay, a significantly reduction of the CH 4 production rate by the action of PFOS was observed, compared with the control without PFAS.…”

Section: Resultsmentioning

confidence: 99%

“…PFAS, including per- and polyfluoroalkyl substances, are organofluorine compounds highly used in several industrial sectors for applications such as oil production, refrigerators, firefighting foams, textiles, and stain resistance products, among others [ 1 , 2 ]. These compounds are known to pose environmental and human health risks due to their wide distribution, recalcitrant behavior, bioaccumulation tendencies, and potential toxicological effects [ 1 , 3 ].…”

Section: Introductionmentioning

confidence: 99%

“…Among PFAS, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), which have been widely manufactured and can also be formed via degradation of precursors including fluorotelomer-based compounds such as alcohols, sulfonates, and amides, among others [ 5 , 6 , 7 ], are the most frequently present in many environmental settings and are of increasing concern [ 3 , 8 , 9 ]. These compounds are often released in large quantities directly into the environment and end up in water courses [ 2 , 3 ]. Regarding wastewater, on average 638.2 ng L −1 and 465.4 ng L −1 of PFOA and PFOS, respectively, have been detected worldwide [ 9 ].…”

Section: Introductionmentioning

confidence: 99%

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Bioremediation of Perfluoroalkyl Substances (PFAS) by Anaerobic Digestion: Effect of PFAS on Different Trophic Groups and Methane Production Accelerated by Carbon Materials

et al. 2022

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Per- and polyfluoroalkyl substances (PFAS) are recalcitrant pollutants which tend to persist in soils and aquatic environments and their remediation is among the most challenging with respect to organic pollutants. Anaerobic digestion (AD) supplemented with low amounts of carbon materials (CM), acting as electron drivers, has proved to be an efficient process for the removal of organic compounds from wastewater. This work explores the impact of PFAS on different trophic groups in anaerobic communities, and the effect of carbon nanotubes (CNT), activated carbon (AC), and oxidized AC (AC-HNO3), as electron shuttles on the anaerobic bioremoval of these compounds, based on CH4 production. The inhibition of the specific methanogenic activity (SMA) exerted by perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), at a concentration of 0.1 mg L−1, was below 10% for acetoclastic and below 15%, for acetogenic communities. Hydrogenotrophic methanogens were not affected by the presence of PFAS. All CM reduced the negative impact of PFAS on the CH4 production rate, but AC was the best. Moreover, the methanization percentage (MP) of sewage sludge (SS) increased 41% in the presence of PFOS (1.2 g L−1) and AC. In addition, AC fostered an increase of 11% in the MP of SS+PFOS, relative to the condition without AC. AC promoted detoxification of PFOA- and PFOS-treated samples by 51% and 35%, respectively, as assessed by Vibrio fischeri assays, demonstrating the advantage of bringing AD and CM together for PFAS remediation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioremediation of Perfluoroalkyl Substances (PFAS) by Anaerobic Digestion: Effect of PFAS on Different Trophic Groups and Methane Production Accelerated by Carbon Materials

et al. 2022

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“…For example, methane production was observed to be enhanced in the presence of PFOS [62], and results suggested that PFOS may act as metabolic decouplers. Conversely, PFAS-containing AFFFs have been reported to inhibit both methane production and co-contaminant degradation in an anaerobic microbial community [63]. This remains an area of intense research activity because the potential presence of PFAS volatiles in biogas raises concerns regarding the further spread of PFAS via atmospheric routes [64].…”

Section: Pfas Volatiles In Landfill Gaseous Emissionsmentioning

confidence: 99%

Interactions of Per- and Polyfluoralkyl Substances (PFAS) with Landfill Liners

Gates¹,

MacLeod²,

Fehérvári³

et al. 2020

AEER

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This review synthesises the available published research on interactions of per- and polyfluoroalkyl substances (PFAS) with landfill liners, with the view to inform on the expected behaviour of these persistent environmental pollutants in landfills. The review addresses the nature and significant types of PFAS compounds that are destined for landfills, as well as their by-product. It discusses the known and anticipated interactions with separate landfill liner components, namely geomembranes, geosynthetic clay liners and compacted clay liners. Various water-soluble PFAS are shown to advectively transport through geosynthetic clay liners (GCL) and showcase the limitations of relying on mineral liners alone to retain PFAS. Addition of activated carbon, while increasing saturated hydraulic conductivity, significantly increases PFAS retention by the GCL and reduced PFAS flux to manageable concentrations. An assessment of the relative risk for environmental exposure of different types of PFAS from landfills through interaction with those liner components is achieved with reference to published case studies of PFAS detection in and around landfills from Australia and around the World.

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“…Microbial community metabarcoding tools and quantitative polymerase chain reaction have been applied in an effort to correlate changes in microbial community structures to PFAS contamination in order to form hypotheses about the main microbial players involved in PFAS transformations (Bao et al 2018;Fitzgerald et al 2019;Ke et al 2020;O'Carroll et al 2020;Zhang et al 2019aZhang et al , b, 2020. O'Carroll et al (2020) observed an increase in the relative abundance of Gordonia spp.…”

Section: Introductionmentioning

confidence: 99%

Transcriptomic response of Gordonia sp. strain NB4-1Y when provided with 6:2 fluorotelomer sulfonamidoalkyl betaine or 6:2 fluorotelomer sulfonate as sole sulfur source

et al. 2020

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Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are environmental contaminants of concern. We previously described biodegradation of two PFAS that represent components and transformation products of aqueous film-forming foams (AFFF), 6:2 fluorotelomer sulfonamidoalkyl betaine (6:2 FTAB) and 6:2 fluorotelomer sulfonate (6:2 FTSA), by Gordonia sp. strain NB4-1Y. To identify genes involved in the breakdown of these compounds, the transcriptomic response of NB4-1Y was examined when grown on 6:2 FTAB, 6:2 FTSA, a non-fluorinated analog of 6:2 FTSA (1-octanesulfonate), or MgSO4, as sole sulfur source. Differentially expressed genes were identified as those with ± 1.5 log2-fold-differences (± 1.5 log2FD) in transcript abundances in pairwise comparisons. Transcriptomes of cells grown on 6:2 FTAB and 6:2 FTSA were most similar (7.9% of genes expressed ± 1.5 log2FD); however, several genes that were expressed in greater abundance in 6:2 FTAB treated cells compared to 6:2 FTSA treated cells were noted for their potential role in carbon–nitrogen bond cleavage in 6:2 FTAB. Responses to sulfur limitation were observed in 6:2 FTAB, 6:2 FTSA, and 1-octanesulfonate treatments, as 20 genes relating to global sulfate stress response were more highly expressed under these conditions compared to the MgSO4 treatment. More highly expressed oxygenase genes in 6:2 FTAB, 6:2 FTSA, and 1-octanesulfonate treatments were found to code for proteins with lower percent sulfur-containing amino acids compared to both the total proteome and to oxygenases showing decreased expression. This work identifies genetic targets for further characterization and will inform studies aimed at evaluating the biodegradation potential of environmental samples through applied genomics. Graphic Abstract

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Aqueous film forming foam and associated perfluoroalkyl substances inhibit methane production and Co-contaminant degradation in an anaerobic microbial community

Abstract: This work determines the components of aqueous film forming foam responsible for disrupting microbial community functions.

Cited by 15 publications

References 38 publications

Bioremediation of Perfluoroalkyl Substances (PFAS) by Anaerobic Digestion: Effect of PFAS on Different Trophic Groups and Methane Production Accelerated by Carbon Materials

Bioremediation of Perfluoroalkyl Substances (PFAS) by Anaerobic Digestion: Effect of PFAS on Different Trophic Groups and Methane Production Accelerated by Carbon Materials

Interactions of Per- and Polyfluoralkyl Substances (PFAS) with Landfill Liners

Transcriptomic response of Gordonia sp. strain NB4-1Y when provided with 6:2 fluorotelomer sulfonamidoalkyl betaine or 6:2 fluorotelomer sulfonate as sole sulfur source

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