Drivers of change behind the spatial distribution and fate of typical trace organic pollutants in fresh waste leachate across China

Water Research, Journal Year: 2024, Volume and Issue: 263, P. 122170 - 122170

Published: July 28, 2024

Language: Английский

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A critical review of perfluoroalkyl and polyfluoroalkyl substances (PFAS) landfill disposal in the United States

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

Published: Sept. 19, 2023

Language: Английский

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Toward the development of a molecular toolkit for the microbial remediation of per-and polyfluoroalkyl substances

Applied and Environmental Microbiology, Journal Year: 2024, Volume and Issue: 90(4)

Published: March 17, 2024

ABSTRACT Per- and polyfluoroalkyl substances (PFAS) are highly fluorinated synthetic organic compounds that have been used extensively in various industries owing to their unique properties. The PFAS family encompasses diverse classes, with only a fraction being commercially relevant. These found the environment, including water sources, soil, wildlife, leading human exposure fueling concerns about potential health impacts. Although degradation is challenging, biodegradation offers promising, eco-friendly solution. Biodegradation has effective for variety of contaminants but yet be successful due paucity identified microbial species capable transforming these compounds. Recent studies investigated biotransformation fluoride release; however, number specific microorganisms enzymes demonstrable activity remains limited. This review discusses could metabolism, haloacid dehalogenases, reductive cytochromes P450, alkane butane monooxygenases, peroxidases, laccases, desulfonases, mechanisms resistance intracellular fluoride. Finally, we emphasize enzyme engineering advance strategies provide insights future research this field.

Language: Английский

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Enhancing the Thermal Mineralization of Perfluorooctanesulfonate on Granular Activated Carbon Using Alkali and Alkaline-Earth Metal Additives

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(25), P. 11162 - 11174

Published: June 10, 2024

Thermal treatment has emerged as a promising approach for either the end-of-life or regeneration of granular activated carbon (GAC) contaminated with per- and polyfluoroalkyl substances (PFAS). However, its effectiveness been limited by requirement high temperatures, generation products incomplete destruction, necessity to scrub HF in flue gas. This study investigates use common alkali alkaline-earth metal additives enhance mineralization perfluorooctanesulfonate (PFOS) adsorbed onto GAC. When treated at 800 °C without an additive, only 49% PFOS was mineralized HF. All tested demonstrated improved mineralization, Ca(OH)2 had best performance, achieving efficiency 98% air N2. Its ability increase reaction rate shift byproduct selectivity suggests that role may be catalytic. Moreover, reduced gas instead reacting additive form inorganic fluorine (e.g., CaF2) starting waste material. A hypothesized mechanism is proposed involves electron transfer from O2– defect sites CaO intermediates formed during thermal decomposition PFOS. These findings advocate GAC disposal reuse, potential reduce operating costs mitigate environmental impact associated incinerating PFAS-laden wastes.

Language: Английский

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Calcium enhanced the simultaneous removal of fluoride and phosphorus in constructed wetlands by mediating coupled abiotic-biotic transformation mechanisms

Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115905 - 115905

Published: Feb. 1, 2025

Language: Английский

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Key factors in the selection, functionalization and regeneration of activated carbon for the removal of the most common micropollutants in drinking water

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(4), P. 113105 - 113105

Published: May 21, 2024

Language: Английский

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PFAS in Landfill Leachate: Practical Considerations for Treatment and Characterization

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: unknown, P. 136685 - 136685

Published: Nov. 1, 2024

Language: Английский

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Removal of Per- and Polyfluoroalkyl Substances by Adsorption on Innovative Adsorbent Materials

Sustainability, Journal Year: 2023, Volume and Issue: 15(17), P. 13056 - 13056

Published: Aug. 30, 2023

Per- and polyfluoroalkyl substances (PFAS) constitute a group of organofluorine chemical synthetic compounds widely used in industries manufacturing due to their hydrophobic properties. However, PFAS have been found cause negative human health outcomes. Therefore, strong interest the possible removal these from wastewater (WW) has shown. This work aims present systematic analysis scientific literature related innovative alternative adsorbent materials that can be for treating PFAS-contaminated WW. Moreover, adsorption processes are considered, focusing attention on virgin biochar as adsorbents. Virgin comprise conventional materials, functional clays, metal–organic frameworks, functionalized organic polymers. Biochar includes obtained agricultural or food residues sewage sludge. The review shows treatment units using characterized by high capacity, but also costs. In addition, refunctionalization is difficult obtain. On contrary, biochar, which residual product other production processes, appears cost-effective solution.

Language: Английский

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Revealing the Role of Varied Quaternary Ammonium Groups for Capturing Per- and Polyfluoroalkyl Substances

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

Published: Feb. 19, 2025

Language: Английский

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Optimizing electrochemical removal of perfluorooctanoic acid in landfill leachate using ceramic carbon foam electrodes by coupling CFD simulation and reactor design

Chemosphere, Journal Year: 2025, Volume and Issue: 376, P. 144282 - 144282

Published: March 9, 2025

Language: Английский

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