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

Advanced electrocatalytic redox processes for environmental remediation of halogenated organic water pollutants DOI Creative Commons
Madeleine K. Wilsey,

Teona Taseska,

Ziyi Meng

et al.

Chemical Communications, Journal Year: 2023, Volume and Issue: 59(80), P. 11895 - 11922

Published: Jan. 1, 2023

An urgent need for quantitative mechanistic understanding of advanced redox processes aqueous electrocatalytic organohalogen destruction methods is addressed, highlighting remediation fluorinated, chlorinated, and brominated water pollutants.

Language: Английский

Citations

17
A review on the occurrence of per- and polyfluoroalkyl substances in the aquatic environment and treatment trends for their removal DOI

Leen Dirani,

George M. Ayoub,

Lilian Malaeb

et al.

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113325 - 113325

Published: June 12, 2024

Language: Английский

Citations

8
Removal of Poly- and Perfluoroalkyl Substances from Natural and Wastewater by Tailored Silica-Based Adsorbents DOI Creative Commons
О. А. Дударко, Tetyana M. Budnyak, Oleg Tkachenko

et al.

ACS ES&T Water, Journal Year: 2024, Volume and Issue: 4(4), P. 1303 - 1314

Published: Jan. 13, 2024

Per- and polyfluoroalkyl substances (PFAS) are very stable ubiquitously distributed in terrestrial aquatic environments, treatment remediation techniques for the removal of PFAS urgently needed. In this study, mesoporous silica matrix SBA-15 grafted with alkyl amino groups was used to remove perfluorooctanoate (PFOA) from aqueous solutions. The were onto by condensation silanes. synthesized adsorbents studied SEM, TEM, IR, low-temperature nitrogen sorption, XRD. solid-state liquid 19F NMR spectroscopy, EDX, LC-MS/MS results showed high adsorption efficiency rapid reaction kinetics. freshly prepared solutions on surface sorbents, presence PFOA micelles observed. Furthermore, introduction amine-containing into structure sorbent allows sorption up 649 mg/g Results that protonated interacted electrostatically. obtained open perspectives producing facile extraction PFAS.

Language: Английский

Citations

6
Low-Temperature Mineralization of Fluorotelomers with Diverse Polar Head Groups DOI

Richard J. Monsky,

Yuli Li, K. N. Houk

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(25), P. 17150 - 17157

Published: June 13, 2024

Per- and polyfluoroalkyl substances (PFAS) are persistent environmental pollutants linked to harmful health effects. Currently employed PFAS destruction methods energy-intensive often produce shorter-chain recalcitrant partially fluorinated byproducts. We report the mineralization of five fluorotelomer compounds via a base-mediated degradation using NaOH mild temperatures (120 °C) in mixture DMSO:H2O (8:1 v/v). The studied fluorotelomers have varying polar head groups–carboxylic acids, sulfonic alcohols, phosphonic which most common groups used commercial industrial applications. intermediates byproducts were characterized 1H, 13C, 19F NMR spectroscopy. Density functional theory computations at M06-2X/6-311 + G(2d,p)-SMD-(DMSO) level consistent with observed guided an overall mechanistic hypothesis. Degradation each occurs through similar process, nonfluorinated carbons first carbon cleaved from remaining perfluoroalkyl fragment, degrades previously identified pathways. These findings provide important insight into processes suggest that containing least one C–H bond within or adjacent its fluoroalkyl chain can be degraded under these conditions. Many current use as well generated other candidates for this approach.

Language: Английский

Citations

6
Scaling up water treatment technologies for PFAS destruction: current status and potential for fit-for-purpose application DOI Creative Commons
Jens Blotevogel, Selma Mededovic Thagard, Shaily Mahendra

et al.

Current Opinion in Chemical Engineering, Journal Year: 2023, Volume and Issue: 41, P. 100944 - 100944

Published: July 14, 2023

Language: Английский

Citations

16
Contributions of reactor geometry and ultrasound frequency on the efficiency of sonochemical reactor DOI Creative Commons
Jitendra A. Kewalramani, Bruno Bezerra de Souza, Richard W. Marsh

et al.

Ultrasonics Sonochemistry, Journal Year: 2023, Volume and Issue: 98, P. 106529 - 106529

Published: July 20, 2023

An intermediate-scale reactor with 10L capacity and two transducers operating at 700 950 kHz frequencies was developed to study the scalability of sonolytic destruction Per Polyfluoroalkyl substance (PFAS). The impact frequency, height liquid or power density, transducer position on performance evaluated potassium iodide (KI) oxidation calorimetric power. dual frequency mode operation has a synergistic effect based triiodide concentration, were higher in this compared combination both individually. sonochemical efficiency for an (10L) similar that obtained from bench-scale (2L), showing technology. placement bottom side wall had no significant reactivity. superposition ultrasonic field (side bottom) did not produce single (bottom side). This can be attributed disturbance due interaction fields each transducer. With encouraging results scaling up is progress site implementation.

Language: Английский

Citations

15
Adsorption of per- and polyfluoroalkyl substances (PFAS) from water with porous organic polymers DOI
Yan Zhang, Bin Wang, Shengqian Ma

et al.

Chemosphere, Journal Year: 2023, Volume and Issue: 346, P. 140600 - 140600

Published: Oct. 31, 2023

Language: Английский

Citations

13
The use of a fluorine mass balance to demonstrate the mineralization of PFAS by high frequency and high power ultrasound DOI
Richard W. Marsh, Jitendra A. Kewalramani, Bruno Bezerra de Souza

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 352, P. 141270 - 141270

Published: Jan. 25, 2024

Language: Английский

Citations

5
Addressing the Persistence of Per- and Poly-fluoroalkyl substances (PFAS): Current Challenges and Potential Solutions DOI Creative Commons
Emeka J. Itumoh,

Shailja Data,

Jack L.‐Y. Chen

et al.

RSC Sustainability, Journal Year: 2024, Volume and Issue: 2(11), P. 3183 - 3201

Published: Jan. 1, 2024

The combined stability, mobility, and bioaccumulation of per- poly-fluoroalkyl substances (PFAS) has prompted a global environmental crisis.

Language: Английский

Citations

5
Fungi as versatile biocatalytic tool for treatment of textile wastewater effluents DOI Creative Commons
Ashok K. Pundir, Mohindra Singh Thakur,

Suraj Prakash

et al.

Environmental Sciences Europe, Journal Year: 2024, Volume and Issue: 36(1)

Published: Oct. 17, 2024

Abstract Textile wastewater poses a significant environmental challenge, primarily due to the presence of diverse contaminants, especially textile dyes. Untreated release these effluents directly into aquatic systems can lead esthetic degradation, eutrophication, reduced photosynthetic activity, and accumulation hazardous substances. Although conventional treatment methods are employed for reducing contaminant load in effluents, they often less efficient, thus prompting exploration innovative alternatives. Current review highlights myco-remediation as an inexpensive, promising environmentally sustainable solution. Fungi, with their decontamination mechanisms such biosorption, biotransformation, immobilization, prove effective heavy metals, persistent organic pollutants, emerging levels present However, more research effort is needed apply biodegradation strategy decompose completely “forever chemicals” per‐ polyfluorinated alkyl Fungi play key role degrading decolorizing dyes biocatalytic activity mediated by production oxidative enzymes, laccases, lignin peroxidases, manganese well dye adsorption capabilities. This comprehensive concentrates on fungi-based remediation including employ. While most studies concentrate effluent treatment, this also explores concurrent utilization biomass growth kinetics efficient reduction pollutant concentrations. Further, current work showed data optimization conditions pH, temperature nutrient requirements that decontamination.

Language: Английский

Citations

5