Sonochemical degradation of perfluorinated chemicals in aqueous film-forming foams

Rodríguez-Freire, Lucía; Abad-Fernández, Nerea; Sierra-Álvarez, Reyes; Hoppe‐Jones, Christiane; Peng, Hui; Giesy, John P.; Snyder, Shane A.; Keswani, Manish

doi:10.1016/j.jhazmat.2016.05.078

Cited by 65 publications

(22 citation statements)

References 31 publications

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“…Sonolysis appears to destroy a wide range of PFAS compounds (long chain and short chain), with consistent observations of pseudo-first order rate kinetics and faster kinetics for larger PFASs with more fluorination (perfluorinated > polyfluorinated; Fernandez et al, 2016;Rayne & Forest, 2009;Rodriguez-Freire et al, 2016;Rodriguez-Freire et al, 2015). One limitation of the available sonolysis data for PFASs is that the focus is on viability and, therefore, high concentrations of PFAS are used (>10,000 ng/L).…”

Section: Sonolysismentioning

confidence: 58%

“…Most non‐PFAAs sonolysis applications are operated between 20 kHz and 40 kHz because of input energy requirements. To treat a broad range of organic contaminants (including PFAAs), a frequency range of 500 kHz to 1,100 kHz seems appropriate based on demonstrations in the literature (Fernandez et al., ; Rodriguez‐Freire et al., ; Rodriguez‐Freire et al., ), but site‐specific, real‐time data observations are suggested to specify a design frequency. Available demonstrations in the literature explore PFAS treatment with sonolysis at frequencies greater than 200 kHz to maximize the surface area and resultant contact between PFAS molecules and microbubbles (Cheng et al., ; Drees, ; Hao et al., ; Mason, ; Moriwaki et al., ; Rayne & Forest, ; Rodriguez‐Freire et al., ; Vecitis et al., ; Vecitis et al., ).…”

Section: Electrochemical Oxidationmentioning

confidence: 99%

See 1 more Smart Citation

A review of emerging technologies for remediation of PFASs

Ross

McDonough

Miles

et al. 2018

Remediation Journal

404

268

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The need for remediation of poly‐ and perfluoroalkyl substances (PFASs) is growing as a result of more regulatory attention to this new class of contaminants with diminishing water quality standards being promulgated, commonly in the parts per trillion range. PFASs comprise >3,000 individual compounds, but the focus of analyses and regulations has generally been PFASs termed perfluoroalkyl acids (PFAAs), which are all extremely persistent, can be highly mobile, and are increasingly being reported to bioaccumulate, with understanding of their toxicology evolving. However, there are thousands of polyfluorinated “PFAA precursors”, which can transform in the environment and in higher organisms to create PFAAs as persistent daughter products. Some PFASs can travel miles from their point of release, as they are mobile and persistent, potentially creating large plumes. The use of a conceptual site model (CSM) to define risks posed by specific PFASs to potential receptors is considered essential. Granular activated carbon (GAC) is commonly used as part of interim remedial measures to treat PFASs present in water. Many alternative treatment technologies are being adapted for PFASs or ingenious solutions developed. The diversity of PFASs commonly associated with use of multiple PFASs in commercial products is not commonly assessed. Remedial technologies, which are adsorptive or destructive, are considered for both soils and waters with challenges to their commercial application outlined. Biological approaches to treat PFASs report biotransformation which creates persistent PFAAs, no PFASs can biodegrade. Water treatment technologies applied ex situ could be used in a treatment train approach, for example, to concentrate PFASs and then destroy them on‐site. Dynamic groundwater recirculation can greatly enhance contaminant mass removal via groundwater pumping. This review of technologies for remediation of PFASs describes that: GAC may be effective for removal of long‐chain PFAAs, but does not perform well on short‐chain PFAAs and its use for removal of precursors is reported to be less effective; Anion‐exchange resins can remove a wider array of long‐ and short‐chain PFAAs, but struggle to treat the shortest chain PFAAs and removal of most PFAA precursors has not been evaluated; Ozofractionation has been applied for PFASs at full scale and shown to be effective for removal of total PFASs; Chemical oxidation has been demonstrated to be potentially applicable for some PFAAs, but when applied in situ there is concern over the formation of shorter chain PFAAs and ongoing rebound from sorbed precursors; Electrochemical oxidation is evolving as a destructive technology for many PFASs, but can create undesirable by‐products such as perchlorate and bromate; Sonolysis has been demonstrated as a potential destructive technology in the laboratory but there are significant challenges when considering scale up; Soils stabilization approaches are evolving and have been used at full scale but performance need to be assessed usin...

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Section: Sonolysismentioning

confidence: 58%

Section: Electrochemical Oxidationmentioning

confidence: 99%

A review of emerging technologies for remediation of PFASs

Ross

McDonough

Miles

et al. 2018

Remediation Journal

404

268

View full text Add to dashboard Cite

show abstract

“…; Schaefer et al ), and sonolysis (Vecitis et al ; Campbell et al. ; Rodriguez‐Freire et al ; Wood et al ). Advanced oxidizing processes (AOPs) are discussed as some literature describes the sequential defluorination of long‐chain PFCAs (specifically PFOA), but AOPs are largely inefficient for mineralization of PFAS (Bruton and Sedlak ) and have not been successfully demonstrated to attack or mineralize the perfluoroalkyl sulfonates (PFSAs).…”

Section: Considerations For Available Pfas‐relevant Destruction Technmentioning

confidence: 99%

Understanding and Managing the Potential By‐Products of PFAS Destruction

Horst

McDonough

Ross

et al. 2020

Groundwater Monitoring Rem

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“…The collapse generates local temperatures up to 5000 K (Niemczewski, 2007; Suslick et al, 1999). Sonolysis has been used to treat PFAS‐spiked samples, aqueous film‐forming foams formulations, and landfill groundwater under varied conditions at scales ranging from less than 1–91 L (Gole et al, 2018; Moriwaki et al, 2005; Rodriguez‐Freire et al, 2016; Vecitis et al, 2008). Each study reported varying removal of PFAS, dependent upon initial concentration, frequency, and other cocontaminants.…”

Section: Introductionmentioning

confidence: 99%

A sustainability assessment of an in situ ultrasonic reactor for remediation of PFAS‐contaminated groundwater

Laramay¹,

Crimi

2020

Remediation Journal

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The environmental remediation industry has increasingly considered the sustainability impacts of remediation systems. The ideal remediation system has a greater environmental benefit than detriment. While sustainable systems are increasingly available for many contaminants, per-and polyfluoroalkyl substances have presented new challenges for remediation practitioners seeking effective and sustainable systems. Here the sustainability and cost impacts of an ultrasonic reactor installed in a horizontal well (referred to as the In situ reactor technology [inSRT] system) at a hypothetical site are quantified and compared to hypothetical pump-and-treat (PT) system impacts. Direct costs of emissions from remediation were compared using levelized cost of energy data. The indirect impacts from pollution were quantified based on literature values. The results showed that the InSRT system had lower lifecycle impacts and costs compared to the PT system when each was considered under individually optimal conditions. InSRT was found to meet sustainability goals when used in a low hydraulic conductivity source zone and the PT system lifecycle impacts were reduced when the system was used in a highhydraulic conductivity area.

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Sonochemical degradation of perfluorinated chemicals in aqueous film-forming foams

Cited by 65 publications

References 31 publications

A review of emerging technologies for remediation of PFASs

A review of emerging technologies for remediation of PFASs

Understanding and Managing the Potential By‐Products of PFAS Destruction

A sustainability assessment of an in situ ultrasonic reactor for remediation of PFAS‐contaminated groundwater

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