Journal ArticleDOI
Sorption of Perfluorinated Surfactants on Sediments
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TLDR
The sorption of anionic perfluorochemical (PFC) surfactants of varying chain lengths to sediments was investigated using natural sediments of varying iron oxide and organic carbon content, suggesting the importance of hydrophobic interactions.Abstract:
The sorption of anionic perfluorochemical (PFC) surfactants of varying chain lengths to sediments was investigated using natural sediments of varying iron oxide and organic carbon content. Three classes of PFC surfactants were evaluated for sorptive potential: perfluorocarboxylates, perfluorosulfonates, and perfluorooctyl sulfonamide acetic acids. PFC surfactant sorption was influenced by both sediment-specific and solution-specific parameters. Sediment organic carbon, rather than sediment iron oxide content, was the dominant sediment-parameter affecting sorption, indicating the importance of hydrophobic interactions. However, sorption also increased with increasing solution [Ca2+] and decreasing pH, suggesting that electrostatic interactions play a role. Perfluorocarbon chain length was the dominant structural feature influencing sorption, with each CF2 moiety contributing 0.50−0.60 log units to the measured distribution coefficients. The sulfonate moiety contributed an additional 0.23 log units to the ...read more
Citations
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Journal ArticleDOI
Are PFCAs Bioaccumulative? A Critical Review and Comparison with Regulatory Criteria and Persistent Lipophilic Compounds
TL;DR: The bioaccumulation potential of perfluorinated acids with seven fluorinated carbons or less appears to be several orders of magnitude lower than "legacy" persistent lipophilic compounds classified as bioaccuulative.
Journal ArticleDOI
Adsorption behavior and mechanism of perfluorinated compounds on various adsorbents--a review.
TL;DR: This review paper would be helpful for the preparation of effective adsorbents for PFC removal and understanding interfacial process of PFCs during their transport and fate in aquatic environments.
Journal ArticleDOI
Sorption of perfluorooctane sulfonate and perfluorooctanoate on activated carbons and resin: Kinetic and isotherm study
TL;DR: Based on the sorption behaviors and the characteristics of the adsorbents and adsorbates, ion exchange and electrostatic interaction as well as hydrophobic interaction were deduced to be involved in the sor adaptation, and some hemi-micelles and micelles possibly formed in the intraparticle pores.
Journal ArticleDOI
Behaviour and fate of perfluoroalkyl and polyfluoroalkyl substances (PFASs) in drinking water treatment: a review
TL;DR: Early observations suggest that activated carbon adsorption, ion exchange, and high pressure membrane filtration may be effective in controlling these contaminants, however, branched isomers and the increasingly used shorter chain PFAS replacement products may be problematic as it pertains to the accurate assessment of PFAS behaviour through drinking water treatment processes.
Journal ArticleDOI
Polyfluoroalkyl compounds in the aquatic environment: a review of their occurrence and fate
TL;DR: The objective of this article is to give an overview on existing knowledge of the occurrence, fate and processes of PFCs in the aquatic environment, identifies knowledge gaps, presents conclusions and recommendations for future work.
References
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Journal ArticleDOI
Sources, fate and transport of perfluorocarboxylates.
TL;DR: Transport pathways for PFCAs in the environment were reviewed, and it was concluded that, in addition to atmospheric transport/degradation of precursors, atmospheric and ocean water transport of the PFCA themselves could significantly contribute to their long-range transport.
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Perfluorochemical surfactants in the environment.
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Quantitative determination of perfluorochemicals in sediments and domestic sludge.
TL;DR: A quantitative analytical method was developed that consists of liquid solvent extraction of the analytes from sediments and sludge, cleanup via solid-phase extraction, and injection of the extracts with internal standards into a high-performance liquid chromatography system coupled to a tandem mass spectrometer (LC/MS/MS).
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Monitoring Perfluorinated Surfactants in Biota and Surface Water Samples Following an Accidental Release of Fire-Fighting Foam into Etobicoke Creek
TL;DR: The residence time of perfluorooctanesulfonate in Etobicoke Creek as well as the high bioaccumulation in fish liver suggests that perfluoroalkane-sulfonates will persist andBioaccumulate following release into the aquatic environment.
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Quantitative Characterization of Trace Levels of PFOS and PFOA in the Tennessee River
TL;DR: A solid-phase extraction method coupled with HPLC-negative-ion electrospray tandem mass spectrometry was developed to quantitatively measure trace levels of organic fluorochemicals in drinking water and surface water, indicating that effluent from manufacturing is one likely source of organic Fluorooctane sulfonate into the river.