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Temporal variability and sources of PFAS in the rio Grande,New Mexico through an arid urban area using multiple tracers and highfrequency sampling

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Emerging Contaminants 2024年第3期10卷 205-220页

作者： Kimberly r.Beisner rebecca E.Travis David A.Alvarez Larry B.Barber jacob A.Fleck j.r.my r.jasmann U.S.Geological Survey 6700 Edith Blvd NEAlbuquerqueNM87113USA U.S.Geological Survey 4200 New Haven RoadColumbiaMO65201USA U.S.Geological Survey 3215 Marine St.BoulderCO80303USA U.S.Geological Survey 6000 J St.Placer Hall.SacramentoCA95819USA

Per-and polyfluoroalkyl substances(PFAS)are ubiquitous in the environment but sources are not well defined for temporal and spatial aspects within an urban environment,and especially for an arid urban environment subject to seasonal short term high-intensity precipitation events.A focused diel sampling was conducted in the summer of 2021 to assess the temporal and spatial variability of PFAS in the rio Grande near Albuquerque,New Mexico and showed an order of magnitude increase of PFAS as it flows through the Albuquerque urban *** samples were collected at two different locations on the rio Grande in addition to wastewater treatment plant(WWTP)effluent that discharges directly to the rio Grande between the sampling ***-term high-intensity precipitation events occurred during the study period and mobilized PFAS from urban *** organic matter composed of tryptophan-like organic substances and refined fuel and fuel byproducts,characteristic of an urban signature,were also related to the precipitation *** PFAS in discharge from the WWTP was consistent over a 24-h period with slight differences in some *** presence on the rio Grande downstream of the WWTP was evidenced by a gadolinium anomaly as well as increases in several other trace elements,total dissolved nitrogen,and fluorescence indicators,in addition to *** varied depending on source contribution,where urban runoff was associated with PFOA,PFOS,and PFBA,whereas PFHxA and PFPeA were associated with wastewater *** addition,passive polar organic chemical integrative samplers(POCIS)using hydrophilic-lipid balance(HLB)sorption media were deployed for a month at two locations on the rio Grande to assess longer term PFAS *** POCIS results show some compounds(PFPeA and PFHpA)were greater than the average concentration from discrete samples,whereas other compounds(PFHxA,PFOA,PFDA,and PFNA)were lower in the POCIS,and PFOS was very simila

关键词： wastewater rio runoff

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