Coupled high and low-frequency ultrasound remediation of PFAS-contaminated soils

Kewalramani, Jitendra A.; Wang, Boran; Marsh, Roger R.; Meegoda, Jay N.; Freire, Lucia Rodriguez

doi:10.1016/j.ultsonch.2022.106063

Cited by 35 publications

(12 citation statements)

References 88 publications

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“…The mechanism consists of the generation and implosion of vapor bubbles. Organic pollutant degradation is achieved by a combination of radical reaction and combustion by pyrolysis [ 94 , 95 , 96 ]. The bubble collapse is the driving mechanism responsible for pyrolysis and combustion of organic compounds in the vicinity of the imploding bubble.…”

Section: Sonolysismentioning

confidence: 99%

“…Research on sonochemical parameters indicates that ultrasonic frequency is highly important for the effective degradation of PFASs [ 96 , 101 , 102 , 103 ]. Although chemical activity can be further enhanced using a combination of frequencies [ 104 , 105 ], the production of cavitational bubble volume fractions is higher for dual-frequency than single-frequency reactors [ 105 , 106 , 107 ].…”

Section: Sonolysismentioning

confidence: 99%

“…As mentioned above, pyrolysis will induce localized incineration for a very short period of time of several ns. Interestingly, it has been observed that sonolysis can also degrade PFASs in soil with little residue remaining in the liquid phase [ 4 , 96 ]. Experiments with landfill leachate showed that co-contaminants did not impact the sonolysis efficiency of the degradation of PFOA and PFOS [ 108 ].…”

Section: Sonolysismentioning

confidence: 99%

“…Furthermore, sonochemistry treatment can achieve complete defluorination without pretreatment and without the need for the addition of chemicals/additives and with higher kinetic reaction rates [ 105 , 112 ]. The technology does not need adjustments of temperature or pressure to work and has a low environmental impact [ 95 , 96 ].…”

Section: Sonolysismentioning

confidence: 99%

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A Review of PFAS Destruction Technologies

Meegoda

Souza²,

Casarini³

et al. 2022

IJERPH

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Per- and polyfluoroalkyl substances (PFASs) are a family of highly toxic emerging contaminants that have caught the attention of both the public and private sectors due to their adverse health impacts on society. The scientific community has been laboriously working on two fronts: (1) adapting already existing and effective technologies in destroying organic contaminants for PFAS remediation and (2) developing new technologies to remediate PFAS. A common characteristic in both areas is the separation/removal of PFASs from other contaminants or media, followed by destruction. The widely adopted separation technologies can remove PFASs from being in contact with humans; however, they remain in the environment and continue to pose health risks. On the other hand, the destructive technologies discussed here can effectively destroy PFAS compounds and fully address society’s urgent need to remediate this harmful family of chemical compounds. This review reports and compare widely accepted as well as emerging PFAS destruction technologies. Some of the technologies presented in this review are still under development at the lab scale, while others have already been tested in the field.

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Section: Sonolysismentioning

confidence: 99%

Section: Sonolysismentioning

confidence: 99%

Section: Sonolysismentioning

confidence: 99%

Section: Sonolysismentioning

confidence: 99%

See 2 more Smart Citations

A Review of PFAS Destruction Technologies

Meegoda

Souza²,

Casarini³

et al. 2022

IJERPH

Self Cite

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“…Its outstanding chemical and physical properties, including hydrophobicity, oleophobicity, and extraordinary chemical stability (Gong et al, 2016;Li et al, 2012;Loos et al, 2008), has led to its widespread use in polymerization aids (Yao et al, 2013), fast-food containers, water-resistant clothing, aqueous re-ghting foams, painting materials, stain-resistant carpeting, surfactant, lubricants, wetting agents (Liu et al, 2021;Paul et al, 2009). Therefore PFOA can come from a variety of sources, including aqueous lm-forming foams (Hodgkins et al, 2019;Houtz et al, 2013;Turner et al, 2021), land ll of PFOAs-containing wastes (Sepulvado et al, 2011), water and wastewater treatment plant sludge, biosolids or composts on agricultural lands (Jho et al, 2015;Röhler et al, 2021;Zhu et al, 2022), atmospheric wet deposition and manufacturing industries (Hou et al, 2022;Kewalramani et al, 2022; ).…”

Section: Introductionmentioning

confidence: 99%

Selecting sustainable approach for remediation of PFOA contaminated soils: AHP decision-making

Soltanian,

Salmak,

Baghdadi

et al. 2023

Preprint

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Perfluorooctanoic acid (PFOA), which is an emerging persistent organic and one of the most commonly used PFAS, has a wide range of applications in industrial and production processes, and humans can regularly be exposed to it, so remediation of PFOA-contaminated soil is of great importance. This research presents the importance of PFOA soil pollution, soil remediation related technologies, their mechanisms and the order of remediation priority for three different hypothetical scenarios. Our comprehensive literature review shows that while some remediation methods have shown positive results, some, such as ultrasound, are ineffective in terrestrial ecosystems. Despite the fact that generally, the selection of a practical and compelling soil remediation technique depends on site assessments, our investigation and analysis by implementing an analytical hierarchy process and considering remediation time, environmental impacts, ecological impact, soil disturbance, post management, etc. as criteria, leads to the solidification/stabilization, oxidation, electrokinetic, phytoremediation and bioremediation as the most feasible and promising approaches for remediation of PFOA contaminated sites in our three suggested scenarios, but with different preferences. On the other hand, negative aspects of the electron beam, pulsed corona, and ball milling have placed them at the bottom of our selection list for field scale remediation.

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