Perfluorinated compounds (PFCs) and their short-chain derivatives are contaminants found globally. Adsorption research on volatile perfluorinated compounds (VPFCs), which are the main PFCs substances that undergo transfer and migration, is particularly important. In this study, new fluorine-containing tail materials (FCTMs) were prepared by combining fluorine-containing tail organic compounds with modified glass fibers. The adsorption effects of these FCTMs were generally stronger than that of pure activated glass fibers without fluorine- tailed, with an adsorption efficiency of up to 86% based on F-F interactions. The results showed that the FCTMs had improved desorption efficiency and reusability, and higher adsorption efficiency compared with that of polyurethane foam. FTGF was applied to the active sampler, and the indoor adsorption of perfluorovaleric acid was up to 2.45 ng/m. The adsorption kinetics and isotherm simulation results showed that the adsorption process of typical perfluorinated compounds conformed to the second-order kinetics and Langmuir model. Furthermore, Nuclear Magnetic Resonance (NMR) results showed that the chemical shift in the fluorine spectrum was significantly changed by F-F interactions. This research provides basic theoretical data for the study of VPFCs, especially short-chain VPFCs, facilitating improved scientific support for the gas phase analysis of VPFCs in the environment.
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http://dx.doi.org/10.1016/j.envint.2023.108205 | DOI Listing |
Front Endocrinol (Lausanne)
January 2025
Department of Pediatrics, Hainan Medical University School of Pediatrics, Hainan Women and Children's Medical Center, Haikou, Hainan, China.
Background And Objective: The incidence of central precocious puberty (CPP) in girls increased significantly during the COVID-19 pandemic. This study aimed to explore the impact of perfluorinated endocrine disruptors on CPP through metabolomics analysis in girls from Hainan Province, China.
Methods: Serum samples from 100 girls with CPP and 100 healthy controls were collected.
Molecules
December 2024
Institute of Meteorology and Water Management, National Research Institute, Waszyngtona 42, 81-342 Gdynia, Poland.
In this study, the results of a comprehensive assessment of the variability in the occurrence of ten perfluorinated compounds (PFAS) in fish tissues originating from 2014 to 2019 from six fisheries in the Baltic Sea are presented. A total of 360 fish samples of three species (perch, herring and flatfish) were analysed. For the determination of PFAS, both linear and branched stereoisomers, LC-ESI-MS/MS technique preceded by simultaneous SPE isolation was validated and applied.
View Article and Find Full Text PDFReprod Toxicol
December 2024
Department of Basic Medicine, School of Medicine, Xiamen University, Xiamen, Fujian, 361102, China. Electronic address:
Per- and polyfluoroalkyl substances (PFAS) are synthetic perfluorinated compounds known for their persistence in the environment and reproduction toxicity. PFAS, perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS), have been identified in the follicular fluid of infertile women. However, the specific of PFOA and PFOS mixture on oocyte quality and female fertility remain unclear.
View Article and Find Full Text PDFSe Pu
January 2025
State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing 210046, China.
Emerging contaminants and their transformation products are widely distributed in the environment. These pollutants carry unknown risks owing to their persistence, migration, and toxicity. The wide variety and complex structures of these substances render them difficult to identify using only target analysis.
View Article and Find Full Text PDFJ Hazard Mater
December 2024
Department of Chemical and Biomolecular Engineering, 8 Clarkson Avenue, Clarkson University, Potsdam, NY 13699, USA. Electronic address:
This work used pulsed electrical discharge plasma to treat undiluted Aqueous Film Forming Foam (AFFF) solution that contained significant quantities of per- and polyfluoroalkyl substances (PFAS). The plasma was generated within a plasma spinning disc reactor (PSDR), which utilizes the electric breakdown of argon gas to create plasma over a thin liquid film generated on a spinning disc. The PSDR performance toward degradation of AFFF constituents such as fluorotelomers, perfluorinated C-C alkyl acids, and unidentified precursors was investigated.
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