A Review of PFAS Destruction Technologies

International Journal of Environmental Research and Public Health, Journal Year: 2022, Volume and Issue: 19(24), P. 16397 - 16397

Published: Dec. 7, 2022

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

Language: Английский

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Singlet oxygen in biochar-based catalysts-activated persulfate process: From generation to detection and selectivity removing emerging contaminants

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 485, P. 149724 - 149724

Published: Feb. 16, 2024

Language: Английский

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Effect of cold plasma treatment and plasma‐activated water on physicochemical and structural properties of starch: A green and novel approach for environmental sustainability

Plasma Processes and Polymers, Journal Year: 2024, Volume and Issue: 21(4)

Published: Jan. 20, 2024

Abstract Starch is a crucial part of the human dietary regimen. Still, its restricted water solubility, low viscosity, and weak heat stability are unfavorable physicochemical characteristics that restrict use in food applications. So, 21st century, green novel technologies such as cold plasma technology (CPT) plasma‐activated (PAW) have been employed for starch modification to improve starch's physicochemical, digestibility, functional, structural, thermal properties. This article provided an in‐depth evaluation intervention systems. Moreover, was modified due cross‐linking, etching, depolymerization mechanisms mediated by species. We may conclude CPT PAW substitute methods changing characteristics.

Language: Английский

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Reactive species and mechanisms of perfluorooctanoic acid (PFOA) degradation in water by cold plasma: The role of HV waveform, reactor design, water matrix and plasma gas

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 342, P. 126955 - 126955

Published: March 1, 2024

Language: Английский

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A mini-review on advanced reduction processes for per- and polyfluoroalkyl substances remediation: current status and future prospects

Current Opinion in Chemical Engineering, Journal Year: 2024, Volume and Issue: 44, P. 101018 - 101018

Published: April 3, 2024

Advanced reduction processes (ARPs) have emerged as promising techniques for destruction of persistent per- and polyfluoroalkyl substances (PFAS) due to the formation highly reductive hydrated electrons (eaq−). The present study provides a critical review progress prospects field over past three five years categorizing topics into main sections: i) state art ARPs, comparing promise mechanisms methods such photochemical, ionizing irradiation, plasma, sonolysis, electroreduction, zero-valent iron; ii) integration ARPs with physical-separation methods, oxidation processes, their role in regeneration/management PFAS-laden media; iii) challenges/innovations real-world application ARPs. Three primary future research directions are also proposed alignment current upcoming focuses.

Language: Английский

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Managing PFAS exhausted Ion-exchange resins through effective regeneration/electrochemical process

Water Research, Journal Year: 2024, Volume and Issue: 255, P. 121529 - 121529

Published: March 26, 2024

This study proposes an integrated approach that combines ion-exchange (IX) and electrochemical technologies to tackle problems associated with PFAS contamination. Our investigation centers on evaluating the recovery efficiency of IX/electrochemical systems in presence five different salts, spanning dosages from 0.1% 8%. The outcomes reveal a slight superiority for NaCl within regeneration system, sulfate bicarbonate also showing comparable efficacy. Notably, introduction chloride ion (Cl−) into system results substantial generation undesirable chlorate (ClO3−) perchlorate (ClO4−) by-products, accounting ∼18% ∼81% consumed Cl−, respectively. Several agents, including H2O2, KI, Na2S2O3, exhibited effective mitigation ClO3− ClO4− formation. However, only H2O2 demonstrated favorable influence degradation defluorination PFOA. addition 0.8 M resulted near-complete removal ClO4−, accompanied by 1.3 2.2-fold enhancements PFOA, Furthermore, comparative analysis salts reveals Cl− OH− ions exhibit slower performance, possibly due competitive interactions PFOA anode's reactive sites. In contrast, consistently demonstrate robust decomposition efficiencies. Despite notable enhancement IX efficacy facilitated methanol, particularly PFAS-specific resins, this comes at cost reduced all PFAS. average decay rate ratio 50% compared its absence, falls range 0.11-0.39. conclusion, use 1% Na2SO4 salt stands out as option process. choice not eliminates need introduce additional chemical (e.g., H2O2) wastewater stream, but ensures both satisfactory process through treatment.

Language: Английский

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Complete electrocatalytic defluorination of perfluorooctane sulfonate in aqueous solution with nonprecious materials

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 431, P. 115403 - 115403

Published: Feb. 29, 2024

Perfluorooctane sulfonate (PFOS) was completely defluorinated in aqueous electrocatalysis with laser-made [NiFe]-layered double hydroxide nanocatalysts immobilized on hydrophilic carbon fiber paper anodes. All materials were nonprecious, as needed for globally scalable remediation technologies per- and poly-fluoroalkyl substances (PFAS). Pulsed electrolysis of 0.50 or 0.05 mM PFOS 8.0 M LiOH solution assisted by ultraviolet light irradiation enhanced electrical energy capital expense efficiency compared to existing techniques. Electrocatalytic defluorination occurred within the anode microenvironment, evidenced pulsed vs continuous chronoamperometry data electrolyte agitation experiments. We observed adsorbed surface-bound OOH X-ray photoelectron spectra post-electrocatalysis anodes, corroborating that electrocatalytically regenerated reactive oxygen species microenvironment. High concentrations lithium ions high basicity essential efficient defluorination, which also worked perfluorooctanoic acid (PFOA), albeit more efficiently PFOS, presumably due advanced oxidation processes sulfate radicals near defluorination.

Language: Английский

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Per-and polyfluoroalkyl degradation in a hybrid dielectric barrier discharge plasma and electrooxidation system through involving more reactive species by air and water circulation

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 488, P. 137287 - 137287

Published: Jan. 21, 2025

Language: Английский

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Recent Advances of Emerging Organic Pollutants Degradation in Environment by Non-Thermal Plasma Technology: A Review

Water, Journal Year: 2022, Volume and Issue: 14(9), P. 1351 - 1351

Published: April 21, 2022

Emerging organic pollutants (EOPs), including endocrine disrupting compounds (EDCs), pharmaceuticals and personal care products (PPCPs), persistent (POPs), constitute a problem in the environmental field as they are difficult to completely degrade by conventional treatment methods. Non-thermal plasma technology is novel advanced oxidation process, which combines effects of free radical oxidation, ozone ultraviolet radiation, shockwave, etc. This paper summarized discussed research progress non-thermal remediation EOPs-contaminated water soil. In addition, reactive species process degradation EOPs were summarized, pathways mechanisms evaluated selected for different study cases. At same time, effect synergy with other techniques on environment was evaluated. Finally, bottleneck problems some suggestions future development presented. review contributes our better understanding soil, hoping provide reference relevant practitioners.

Language: Английский

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Advanced electrocatalytic redox processes for environmental remediation of halogenated organic water pollutants

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

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