Publications by authors named "Maria Mendoza Manzano"
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.
Yelena Katsenovich Berrin Tansel Natalia Soares Quinete Zariah Nasir Joshua Omaojo Ocheje Maria Mendoza Manzano
Sci Total Environ
December 2024
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.
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- - The study investigates the presence of PFAS (per- and polyfluoroalkyl substances) in biosolids from two wastewater treatment plants in Miami, specifically focusing on how treatment processes affect PFAS levels and their potential mobility in soil.
- - Samples underwent various treatment processes (thickening, anaerobic digestion, dewatering) and revealed that PFAS tends to accumulate in solids during treatment, but certain processes can release PFAS back into the liquid phase.
- - The findings indicate that a significant number of PFAS are highly soluble, meaning they could easily move into the environment through runoff or during irrigation after the biosolids are applied as fertilizer, raising concerns about land application practices.