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Leaching profile of per- and polyfluoroalkyl substances (PFAS) from biosolids after thickening, anaerobic digestion, and dewatering processes, and significance of protein, phosphorus, and selected ions.
Sci Total Environ
December 2024
Department of Chemistry and Biochemistry, Florida International University, 11960 SW 11th St, Miami, FL, 33199, USA.
Batch leaching experiments were conducted to evaluate the release of forty per- and polyfluoroalkyl substances (PFAS) from sludge samples collected after thickening, anaerobic digestion, and dewatering processes at two wastewater treatment plants. The South District wastewater treatment plant (SDWWTP), which receives domestic wastewater and landfill leachate from a nearby landfill, and the Central District wastewater treatment plant (CDWWTP), which receives only domestic wastewater, were selected for this study. PFAS released into the aqueous phase were analyzed by sacrificial sampling after 1, 3, 7, 14, and 30 days.
View Article and Find Full Text PDFAcoustic Droplet Vaporization Efficiency and Oxygen Scavenging in Whole Blood.
Ultrasound Med Biol
February 2025
Department of Internal Medicine, University of Cincinnati, Cincinnati, OH, USA; Medical Sciences Program, University of Cincinnati, Cincinnati, OH, USA; Department of Biomedical Engineering, University of Cincinnati, Cincinnati, OH, USA; Department of Pediatrics Heart Institute, University of Cincinnati, Cincinnati, OH, USA. Electronic address:
Objective: Acoustic droplet vaporization (ADV) is the liquid-to-gas phase transition of perfluorocarbon (PFC) droplets to microbubbles upon ultrasound insonation. After ADV, gases dissolved in the surrounding fluid diffuse into microbubbles, enabling oxygen scavenging. Characterization of oxygen scavenging and transition efficiency (TE) in whole blood has so far been limited.
View Article and Find Full Text PDFThe efficacy of wastewater treatment plant on removal of perfluoroalkyl substances and their impacts on the coastal environment of False Bay, South Africa.
Environ Sci Pollut Res Int
December 2024
Environmental and Nano Science Group, Department of Chemistry, University of the Western Cape, Cape Town, South Africa.
Per- and polyfluoroalkyl substances (PFASs), which have their origins in both industrial processes and consumer products, can be detected at all treatment stages in wastewater treatment plants (WWTPs). Quantifying the emissions of PFAS from WWTPs into the marine environment is crucial because of their potential impacts on receiving aquatic ecosystems. In this study, the levels of five PFAS were measured in both influent and effluent sewage water samples obtained from a municipal WWTP, the discharges of which flow into False Bay, on the Indian Ocean coast of Cape Town, South Africa.
View Article and Find Full Text PDFFate of biosolids-bound PFAS through pyrolysis coupled with thermal oxidation for air emissions control.
Water Environ Res
November 2024
Brown and Caldwell, Walnut Creek, California, USA.
Pyrolysis has been identified as a possible thermal treatment process for reducing perfluoroalkyl and polyfluoroalkyl substances (PFAS) from wastewater solids, though off-gas from the pyrolysis unit can still be a source of PFAS emissions. In this work, the fate of PFAS through a laboratory-scale pyrolysis unit coupled with a thermal oxidizer for treatment of off-gasses is documented. Between 91.
View Article and Find Full Text PDFTarget, suspect, and non-target screening of per- and poly-fluoroalkyl substances in wastewater treatment plant effluents in South Korea using ion mobility spectrometry-mass spectrometry.
Sci Total Environ
December 2024
Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea. Electronic address:
This study used target, suspect, and non-target screening, to assess the presence of per- and polyfluoroalkyl substances (PFASs) in domestic (municipal) and industrial wastewater treatment plants (WWTPs) in South Korea. Target analysis quantified 20 PFASs in the WWTP effluents. Total concentration of PFASs ranged from 69.
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