A review of foam fractionation for the removal of per- and polyfluoroalkyl substances (PFAS) from aqueous matrices

We, Angel Chyi En; Zamyadi, Arash; Stickland, Anthony D.; Clarke, Bradley O.; Freguia, Stefano

doi:10.1016/j.jhazmat.2023.133182

Cited by 16 publications

(1 citation statement)

References 71 publications

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“…Not all liquids (e.g., groundwater) will readily foam and enhancements to the system engineering (i.e., application of vacuum, microbubbles) can be used for greater effectiveness. A more recent body of work has explored the use of surfactant additions to bulk liquid in foam fractionation to enhance short-chain PFAS removal (Buckley et al, 2022(Buckley et al, , 2023Vo et al, 2023;We et al, 2024).…”

Section: Foam Fractionation (Trl: 9)mentioning

confidence: 99%

Available and emerging liquid treatment technologies for PFASs

DiGuiseppi,

Newell,

Carey

et al. 2024

Remediation Journal

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Per‐ and polyfluoroalkyl substances (PFASs) are present at a wide range of private sector facilities and United States (US) government installations, including those operated by the Department of Defense, the Department of Energy, the National Aeronauts and Space Administration, and other entities, as well as additional sites worldwide. Impacts have been identified in a range of environmental media including drinking water, groundwater, surface water, leachate, wastewater, soil, sediment, and soil gas. Treatment technologies to remove or destroy PFASs cost effectively have proven to be elusive to the industry. However, recent developments are bringing that goal close to reality for some media. This article has been prepared to address only liquid treatment technologies. Soil treatment technologies are presently a lower priority and may be addressed in future articles. The challenge of identifying and evaluating available and emerging liquid treatment technologies was put to the PFAS Experts Symposium in Houston, Texas, on June 7–8, 2023, which was attended by PFAS professionals and subject matter experts with a broad range of backgrounds. The discussions covered a variety of technical approaches and led to the preparation of this manuscript. This article strives to concisely summarize modern technical approaches that are potentially applicable to managing liquid media at PFAS‐impacted sites. Currently, ex situ sorbent technologies using granular activated carbon (GAC) and ion exchange (IX) resin are commercially available and most widely used. Other liquid technologies are summarized and current applications are presented to allow the reader to evaluate each technology for their particular use. This article is not intended to provide guidance on site‐specific design of treatment systems, but instead to serve as an update to earlier articles from this group and others addressing PFAS treatment technologies and related PFAS topics.

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Section: Foam Fractionation (Trl: 9)mentioning

confidence: 99%

Available and emerging liquid treatment technologies for PFASs

DiGuiseppi,

Newell,

Carey

et al. 2024

Remediation Journal

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Enzymatic Degradation of PFAS: Current Status and Ongoing Challenges

Harris,

Zhou,

Clarke

et al. 2024

ChemSusChem

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Per‐ and polyfluoroalkyl substances (PFAS) are often considered the quintessential example of industrial chemical pollution – they are toxic and ubiquitous environmental contaminants that are extremely difficult to degrade. There has been a large research focus on the development of effective and renewable degradation technologies. In comparison to traditional pollutant degradation techniques, such as advanced oxidation processes and electrochemistry, degradation of PFAS using extracellular enzymes offers an eco‐friendly solution as enzymes are biodegradable, recyclable and have low energy and chemical requirements. This review outlines the current understanding of extracellular enzymatic degradation of PFAS with a focus on reported results and proposed degradation mechanisms. More importantly, this review highlights limitations that hinder the application of enzymes for PFAS degradation and proposes critical future research that is needed to improve the applicability of this promising remediation strategy.

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