Degradation of PFOA solutions and PFAS-contaminated groundwater using atmospheric non-thermal plasma treatment DOI Creative Commons

Sonam Gyaljen Tamang,

Georg Umlauf, Jakob Barz

et al.

Water Practice & Technology, Journal Year: 2024, Volume and Issue: 19(7), P. 2645 - 2654

Published: May 27, 2024

ABSTRACT Per- and polyfluoroalkyl substances (PFASs) can be found ubiquitously in the environment due to their large-scale use, they pose risks both ecosystems human health. These pollutants are highly persistent, making them difficult or impossible break down with standard processing methods. Therefore, focus of this research is explore an alternative approach reduce PFAS-contaminated water by investigating breakdown these using atmospheric non-thermal plasma (NTP) technology. The experiments tested PFOA solutions varying parameters, including different oxygen nitrogen ratios as feeding air, without a cooling system, at time exposures. process showed energy efficiency being ranged from 0.31 15.31 mg/kWh. Chemical analysis treated samples confirmed reactor's suitability for PFAS degradation, achieving 63.75% reduction initial concentration after 2 h treatment. Furthermore, degradation products such PFHpA, PFHxA, PFPeA, PFBA were identified Overall, results suggest that plasma-based technology promising treating water.

Language: Английский

A review of foam fractionation for the removal of per- and polyfluoroalkyl substances (PFAS) from aqueous matrices DOI Creative Commons
Angel Chyi En We, Arash Zamyadi, Anthony D. Stickland

et al.

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 465, P. 133182 - 133182

Published: Dec. 7, 2023

The detection of per- and polyfluoroalkyl substances (PFAS) in aqueous matrices is an emerging environmental concern due to their persistent, bioaccumulative toxic properties. Foam fractionation has emerged as a viable method for removing concentrating PFAS from matrices. exploits the surface-active nature adsorb at air-liquid interfaces rising air bubbles, resulting foam formation top fractionator. removal then achieved through harvesting. gained increasing attention owing its inherent advantages, including simplicity low operational costs. coupling with destructive technologies could potentially serve comprehensive treatment train future management PFAS-enriched foam, which smaller volume, can be directed subsequent technologies. In this review, we delve into previous experiences various critically analyse key findings. Then, recent industry advancements commercial projects that utilise technology are identified. Finally, research needs suggested based on current challenges.

Language: Английский

Citations

36
Advancing PFAS Sorbent Design: Mechanisms, Challenges, and Perspectives DOI Creative Commons
Yutong He,

Xinrong Cheng,

Samruddhi Jayendra Jayendra Gunjal

et al.

ACS Materials Au, Journal Year: 2023, Volume and Issue: 4(2), P. 108 - 114

Published: Nov. 9, 2023

Per- and polyfluoroalkyl substances (PFAS) are a group of synthetic chemicals characterized with persistence multisurface resistance. Their accumulation in the environment toxicity to human beings have contributed rapid development regulations worldwide since 2002. The sorption strategy, taking advantage intermolecular interactions for PFAS capture, provides promising efficient solution treatment contaminated sources. Hydrophobic electrostatic two commonly found commercially available sorbents, fluorous interaction being novel mechanism applied sorbent selectivity. main object this Perspective is provide critical review on current design criteria particular focus their mechanisms as well limitations. An outlook future innovative sorbents also provided.

Language: Английский

Citations

24
PFAS in Nigeria: Identifying data gaps that hinder assessments of ecotoxicological and human health impacts DOI Creative Commons

Kenneth N Kikanme,

Nicole M Dennis,

Ochuko Felix Orikpete

et al.

Heliyon, Journal Year: 2024, Volume and Issue: 10(9), P. e29922 - e29922

Published: April 21, 2024

This review examines the extensive use and environmental consequences of Per-and Polyfluoroalkyl Substances (PFAS) on a global scale, specifically emphasizing their potential impact in Nigeria.Recognized for resistance to water oil, PFAS are under increased scrutiny persistent nature possible ecotoxicological risks.Here, we consolidate existing knowledge ecological human health effects Nigeria, focusing neurological risks they pose immune system health.We seek balance advantages with hazards, thereby enhancing understanding management Nigeria advocating more effective policy interventions creation safer alternatives.The concludes several recommendations: strengthening regulatory frameworks, intensifying research into impacts PFAS, developing new methodologies longitudinal studies, fostering collaborative efforts management, promoting public awareness education support sustainable practices healthier communities Nigeria.

Language: Английский

Citations

15
Insights into PFAS environmental fate through computational chemistry: A review DOI
Bruno Bezerra de Souza, Jay N. Meegoda

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 926, P. 171738 - 171738

Published: March 15, 2024

Language: Английский

Citations

11
Ultrasonic degradation of per-and polyfluoroalkyl substances (PFAS), aqueous film-forming foam (AFFF) and foam fractionate (FF) DOI Creative Commons
Olalekan Simon Awoyemi, Yunlong Luo, Junfeng Niu

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 360, P. 142420 - 142420

Published: May 23, 2024

The ubiquitousness of per- and polyfluoroalkyl substances (PFAS) is a big concern PFAS remediation urgently needed such as via degradation. While previous studies have explored ultrasonic degradation PFAS, work evaluating the operational parameters rare, especially concerning real wastes aqueous film-forming foam (AFFF) fractionate (FF). This study investigates key affecting efficiency encompassing ultrasonication frequency (580-1144 kHz), power intensity (125-187.5 W), initial concentration (0.08-40 ppm), treatment duration (0.5-3 h), sample volume (100-500 mL), structure (perfluorooctanoic acid or PFOA; perfluorooctane sulfonate PFOS; 6:2 fluorotelomer FTS). defluorination kinetics different from removal/degradation due to generation intermediates, suggesting complex mechanism, which should be evaluated close mass balance effectively. Notably, optimised system achieves ∼125% / ∼115% in AFFF/FF example (compared ∼65% ∼97% removal) despite their composition involvement total oxidisable precursor (TOP) assay. In meantime, few new are detected post-treatments, including perfluorohexane sulfonic (PFHxS) 10:2 (10:2 FTS) AFFF, sulfonamide (FOSA) 8:2 (8:2 FF, again mechanism. Overall, effective degrade wastes, advancing its potential for scale-up applications.

Language: Английский

Citations

9
The role of suspended biomass in PFAS enrichment in wastewater treatment foams DOI Creative Commons
Angel Chyi En We, Anthony D. Stickland, Bradley O. Clarke

et al.

Water Research, Journal Year: 2024, Volume and Issue: 254, P. 121349 - 121349

Published: Feb. 20, 2024

Foaming in aerated bioreactors at wastewater treatment plants (WWTPs) has been identified as an operational issue for decades. However, the affinity of per- and polyfluoroalkyl substances (PFAS) air-liquid interfaces suggests that foam harvesting potential to become a sustainable method PFAS removal from sewage. Aerated bioreactors' foams are considered three-phase systems, comprising air, aqueous solid components, latter consisting activated sludge biomass. To achieve comprehensive understanding capability enrich PFAS, we analysed concentrations WWTPs both phases collapsed (foamate) underlying bulk mixed liquors. Our findings show enrichment occurs not only phase but also foamate. This previous field studies may have underestimated PFAS. Fractions PFOA PFOS sorbed foamate can be high 60 % 95 %, respectively. highlight importance implementing effective management strategies consider phases.

Language: Английский

Citations

8
Broad-spectrum capture of hundreds of per- and polyfluoroalkyl substances from fluorochemical wastewater DOI Creative Commons
Yiyang Liang, Lihui Yang, Caiming Tang

et al.

Nature Communications, Journal Year: 2025, Volume and Issue: 16(1)

Published: Feb. 25, 2025

Abstract Hundreds of per- and polyfluoroalkyl substances (PFAS) are present in fluorochemical production effluents, existing adsorption devices inadequate to address this PFAS challenge given their extreme structural diversity. Here, we achieve the broad-spectrum capture 107 from effluents using a treatment-train strategy that combines Zn-based electrocoagulation (EC) with anion-exchange resin (AER) beds. The “zero-carbon” adsorbent, zinc hydroxide flocs generated insitu by EC, bulk removes log K ow > 4 through semi-micellar mechanism similar mineral flotation achieves capacities at optimal level all reported adsorbents. Technical-economic analysis life-cycle environmental impact show coupling EC reduces cost an order-of-magnitude carbon-footprint 70% compared AER beds alone. It is also observed iodinated PFAS, some fluorine atoms replaced iodine atoms, exhibit significantly improved selectivity, which may shed light on designing environmentally-friendly fluorochemicals.

Language: Английский

Citations

1
Phosphate-enabled mechanochemical PFAS destruction for fluoride reuse DOI Creative Commons
Long Yang, Zijun Chen, Christopher A. Goult

et al.

Nature, Journal Year: 2025, Volume and Issue: unknown

Published: March 26, 2025

Abstract Perfluoroalkyl and polyfluoroalkyl substances (PFASs) are persistent, bioaccumulative anthropogenic pollutants that have attracted the attention of public private sectors because their adverse impact on human health 1 . Although various technologies been deployed to degrade PFASs with a focus non-polymeric functionalized compounds (perfluorooctanoic acid perfluorooctanesulfonic acid) 2–4 , general PFAS destruction method coupled fluorine recovery for upcycling is highly desirable. Here we disclose protocol converts multiple classes PFAS, including fluoroplastics polytetrafluoroethylene polyvinylidene fluoride, into high-value fluorochemicals. To achieve this, were reacted potassium phosphate salts under solvent-free mechanochemical conditions, mineralization process enabling as KF K 2 PO 3 F fluorination chemistry. The can be recovered reuse, implying no detrimental phosphorus cycle. Therefore, not only destructible but now contribute sustainable circular economy.

Language: Английский

Citations

1
Effect of clay content on the mobilization efficiency of per- and polyfluoroalkyl substances (PFAS) from soils by electrokinetics and hydraulic flushing DOI
Charbel Abou Khalil, Jitendra A. Kewalramani, Zhiming Zhang

et al.

Environmental Pollution, Journal Year: 2023, Volume and Issue: 322, P. 121160 - 121160

Published: Jan. 27, 2023

Language: Английский

Citations

18
A Path to a Reduction in Micro and Nanoplastics Pollution DOI Open Access
Jay N. Meegoda,

Mala C. Hettiarachchi

International Journal of Environmental Research and Public Health, Journal Year: 2023, Volume and Issue: 20(8), P. 5555 - 5555

Published: April 18, 2023

Microplastics (MP) are plastic particles less than 5 mm in size. There two categories of MP: primary and secondary. Primary or microscopic-sized MP intentionally produced material. Fragmentation large debris through physical, chemical, oxidative processes creates secondary MP, the most abundant type environment. Microplastic pollution has become a global environmental problem due to their abundance, poor biodegradability, toxicological properties, negative impact on aquatic terrestrial organisms including humans. Plastic enters environment via direct dumping uncontrolled land-based sources. While slowly degrades into wastewater stormwater outlets discharge amount directly water bodies. Additionally, carries from sources such as tire wear, artificial turf, fertilizers, land-applied biosolids. To protect human health, entry must be reduced eliminated. Source control is one best methods available. The existing growing abundance requires use multiple strategies combat pollution. These include reducing usage, public outreach eliminate littering, reevaluation new treatment sludge disposal methods, regulations macro sources, wide implementation appropriate management practices filtration, bioretention, wetlands.

Language: Английский

Citations

17