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The role of laundry fibers in Per- and Polyfluoroalkyl Substances (PFAS) Adsorption: implications for U.S. Water Safety and Pollution Control
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This research investigates how synthetic fibers released during laundry act as vectors for transporting per- and polyfluoroalkyl substances (PFAS) through wastewater systems. Laundry effluent carries both microfibers and PFAS into treatment facilities, where incomplete removal allows these persistent chemicals to reach aquatic environments. The study highlights a previously underappreciated pathway linking textile microplastics and PFAS contamination.
This study investigates the role of laundry fibers as vectors for per- and polyfluoroalkyl substances (PFAS) transport in U.S. water systems. Through systematic analysis of fiber composition, surface characteristics, and adsorption mechanisms, we analyzed the capacity of common textile fibers to adsorb and transport various PFAS compounds. Utilizing a combination of spectroscopic techniques, batch equilibrium tests, and column breakthrough experiments, it was observed that synthetic fibers exhibit significantly higher PFAS adsorption capacities (0.5-2.4 μg/g) compared to natural fibers (0.1-0.3 μg/g). Adsorption was primarily governed by hydrophobic interactions and electrostatic forces, with pH and ionic strength substantially influencing uptake kinetics. Notably, weathered microfibers showed 30-45% greater PFAS adsorption than pristine fibers, suggesting increased environmental risk from aged textiles. Our findings indicate that laundry fibers serve as significant, previously underestimated vectors for PFAS transport in aquatic environments, with implications for wastewater treatment optimization and regulatory approaches to mitigate this contamination pathway.
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Researchers investigated how two widely detected PFAS compounds, PFOS and PFOA, adsorb onto five common types of microplastics in aquatic environments. The study found that contaminant properties and water chemistry significantly influence adsorption behavior, confirming that microplastics can serve as carriers for PFAS transport in waterways.
Release of Side-Chain Fluorinated Polymer-Containing Microplastic Fibers from Functional Textiles During Washing and First Estimates of Perfluoroalkyl Acid Emissions
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Researchers quantified fibers released from polyamide and polyester/cotton textiles coated with perfluorohexane-based fluoropolymers during accelerated washing, finding that polyamide fabric released over five times more fibers than polyester/cotton. The study estimated that fluorinated side chains on released fibers would slowly degrade into short-chain perfluoroalkyl acids in the environment, with European outdoor jacket washing contributing up to approximately 0.7 tonnes of fluorotelomer alcohol per year.
Adsorption of PFAS onto secondary microplastics: A mechanistic study
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Researchers investigated how PFAS (per- and polyfluoroalkyl substances) adsorb onto secondary microplastics under different water chemistry conditions. Results showed that PFAS adsorption depended on both the chemical structure of the PFAS compound and the ionic composition of the water. These findings help explain how microplastics in real-world aquatic environments can concentrate and transport PFAS, a group of persistent health-relevant pollutants.
Adsorption of Forever Chemical Pollutants: The Physical Chemistry of PFAS near Surfaces
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This review provides a comprehensive analysis of the physical chemistry governing how per- and polyfluoroalkyl substances (PFAS) adsorb onto solid surfaces, covering molecular interactions, thermodynamics, kinetics, and the influence of environmental variables like pH and salinity. The authors identify critical knowledge gaps that currently limit the development of effective adsorption-based remediation strategies for these persistent 'forever chemical' pollutants.
Adsorption of perfluoroalkyl substances on polyamide microplastics: Effect of sorbent and influence of environmental factors
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Researchers studied how perfluoroalkyl substances (PFAS), a group of persistent industrial chemicals, bind to polyamide microplastics in water. They found that smaller microplastic particles absorbed dramatically more PFAS than larger ones, and that water chemistry conditions like pH and salinity influenced the process. The findings suggest microplastics can concentrate harmful chemicals and potentially increase human and wildlife exposure to PFAS in contaminated environments.
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