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

A Critical Review on PFAS Removal from Water: Removal Mechanism and Future Challenges DOI Open Access
Rabia Amen, Alhassan Ibrahim, Waqar Shafqat

et al.

Sustainability, Journal Year: 2023, Volume and Issue: 15(23), P. 16173 - 16173

Published: Nov. 21, 2023

Per and polyfluoroalkyl substances (PFAS) have been extensively employed in a broad range of manufacturing consumer goods due to their highly persistent nature. PFAS exposure is recognized pose serious health hazards; therefore, addressing pollution water has become top priority for public environmental protection organizations. This review article focuses on the efficiency different removal techniques (activated carbon, biochar, ion exchange resin, membrane filtration, reverse osmosis, metal-organic frameworks, foam fractionation, ozone destruction techniques) eliminating types short- long-chain from water. Hydrophobicity electrostatic interactions are revealed be primary mechanisms elimination PFAS. The all eradicate short-chain comparatively lower compared most efficient but some drawbacks, including formation precursors high operational costs. According findings study, it anticipated that combined methods will required effectively remediate PFAS-contaminated

Language: Английский

Citations

30
Bacterial transformation of per- and poly-fluoroalkyl substances: a review for the field of bioremediation DOI Creative Commons
Jessica A. LaFond, Paul B. Hatzinger, Jennifer L. Guelfo

et al.

Environmental Science Advances, Journal Year: 2023, Volume and Issue: 2(8), P. 1019 - 1041

Published: Jan. 1, 2023

Biotransformation of per- and polyfluoroalkyl substances (PFAS) has received growing attention as more research becomes available indicating that bioremediation may have a future role to play in addressing PFAS contamination.

Language: Английский

Citations

28
A critical review of perfluoroalkyl and polyfluoroalkyl substances (PFAS) landfill disposal in the United States DOI
Thabet Tolaymat, Nicole M. Robey, Max J. Krause

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 905, P. 167185 - 167185

Published: Sept. 19, 2023

Language: Английский

Citations

27
Thermal Phase Transition and Rapid Degradation of Forever Chemicals (PFAS) in Spent Media Using Induction Heating DOI Creative Commons
Feng Xiao, Pavankumar Challa Sasi,

Ali Alinezhad

et al.

ACS ES&T Engineering, Journal Year: 2023, Volume and Issue: 3(9), P. 1370 - 1380

Published: April 26, 2023

In this study, we have developed an innovative thermal degradation strategy for treating per- and polyfluoroalkyl substance (PFAS)-containing solid materials. Our satisfies three criteria: the ability to achieve near-complete of PFASs within a short timescale, nonselectivity, low energy cost. our method, metallic reactor containing PFAS-laden sample was subjected electromagnetic induction that prompted rapid temperature rise via Joule heating effect. We demonstrated subjecting (0.001–12 μmol) brief duration (e.g., <40 s) resulted in substantial (>90%) these compounds, including recalcitrant short-chain perfluoroalkyl sulfonic acids. This finding us conduct detailed study phase transitions using thermogravimetric analysis differential scanning calorimetry (DSC). identified at least two endothermic DSC peaks anionic, cationic, zwitterionic PFASs, signifying melting evaporation melted PFASs. Melting points many were reported first time. data suggest rate-limiting step PFAS is linked with evaporation) occurring on different time scales. When are rapidly heated temperatures similar those produced during heating, slows down, allowing PFAS.

Language: Английский

Citations

25
Life cycle assessment and life cycle cost analysis of anion exchange and granular activated carbon systems for remediation of groundwater contaminated by per- and polyfluoroalkyl substances (PFASs) DOI Creative Commons
Anderson Ellis, Treavor H. Boyer, Yida Fang

et al.

Water Research, Journal Year: 2023, Volume and Issue: 243, P. 120324 - 120324

Published: July 8, 2023

Language: Английский

Citations

25
Occurrence, spatiotemporal trends, fate, and treatment technologies for microplastics and organic contaminants in biosolids: A review DOI Creative Commons
Hoang Nhat Phong Vo,

Gia Ky Le,

Lai Nguyen Huy

et al.

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133471 - 133471

Published: Jan. 11, 2024

This review provides a comprehensive overview of the occurrence, fate, treatment and multi-criteria analysis microplastics (MPs) organic contaminants (OCs) in biosolids. A meta-analysis was complementarily analysed through literature to map out occurrence fate MPs 10 different groups OCs. The data demonstrate that (54.7% rate) linear alkylbenzene sulfonate surfactants (44.2% account for highest prevalence In turn, dioxin, polychlorinated biphenyls (PCBs) phosphorus flame retardants (PFRs) have lowest rates (<0.01%). several OCs (e.g., per- polyfluoroalkyl substances, polycyclic aromatic hydrocarbons, pharmaceutical personal care products, ultraviolet filters, phosphate retardants) Europe appear at higher than Asia Americas. However, MP concentrations biosolids from Australia are reported be times America Europe, which required more measurement in-depth analysis. Amongst OC groups, brominated exhibited exceptional sorption with partitioning coefficients (log K

Language: Английский

Citations

13
Near-complete destruction of PFAS in aqueous film-forming foam by integrated photo-electrochemical processes DOI
Yunqiao Guan, Zekun Liu, Nanyang Yang

et al.

Nature Water, Journal Year: 2024, Volume and Issue: 2(5), P. 443 - 452

Published: May 1, 2024

Language: Английский

Citations

12
Cutting-edge technologies and relevant reaction mechanism difference in treatment of long- and short-chain per- and polyfluoroalkyl substances: A review DOI
Meng Zhang, Wenbing Wang, Tiantian Gong

et al.

Chemosphere, Journal Year: 2024, Volume and Issue: 354, P. 141692 - 141692

Published: March 13, 2024

Language: Английский

Citations

9
Enhanced Photodegradation of Perfluocarboxylic acids (PFCAs) using Carbon Quantum Dots (CQDs) Doped TiO2 Photocatalysts: A Comparative Study between Exfoliated Graphite and Mussel Shell-derived CQDs DOI
Mona Nejatpour,

Ayşe Merve Ünsür,

Bülent Yılmaz

et al.

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115382 - 115382

Published: Jan. 1, 2025

Language: Английский

Citations

1
Filling the Gaps in PFAS Detection: Integrating GC-MS Non-Targeted Analysis for Comprehensive Environmental Monitoring and Exposure Assessment DOI
Seth Newton, John A. Bowden, Nathaniel Charest

et al.

Environmental Science & Technology Letters, Journal Year: 2025, Volume and Issue: 12(2), P. 104 - 112

Published: Jan. 23, 2025

Per- and polyfluoroalkyl substances (PFAS) have garnered increasing attention in recent years, non-targeted analysis (NTA) has become essential for elucidating novel PFAS structures. NTA research been dominated by liquid chromatography–mass spectrometry (LC-MS) with gas (GC-MS) used less often as evidenced bibliometrics. However, the performance of GC-MS studies (GC-NTA) rivals that LC-ESI-MS, is shown to cover a complementary chemical space. An LC-ESI-MS amenability model applied list approximately 12,000 revealed than 10% known chemistry predicted be amenable typical LC-MS analysis. Therefore, there strong potential applying methods more fully assess environmental contamination landscape, uniquely shedding light on both PFAS, especially within space realm volatile semivolatile PFAS. Waste streams from fluorochemical manufacturing facilities heavily studied using targeted GC-MS; however, GC-NTA needed discover are not emitted facilities. Studies incineration PFAS-containing materials, such aqueous film forming foam, focused destruction parent compounds, little about transformation products formed during processes. holds elucidate when incinerated. Wastewater treatment plants landfills sources environment, yet understand air emissions these sources. Consumer lead indoor exposures via dust, but this area either or GC-MS. Despite challenges advancing GC-NTA, we call researchers, grantors, managers, other stakeholders recognize necessity so may face together.

Language: Английский

Citations

1