| Autor: |
Roy, James W., Propp, Victoria, Hua, Tammy, De Silva, Amila, Smith, James E. |
| Předmět: |
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| Zdroj: |
Annual Conference on Great Lakes Research Abstract Book; 2023, Vol. 66, p180-180, 1/3p |
| Abstrakt: |
Historic landfills commonly produce plumes of contaminated groundwater, as many lack liners and leachate collection systems. Aquatic ecosystem exposure can then result where these plumes reach nearby surface waters. Recent work has revealed that leachate from historic landfills often contains per- and poly- fluoroalkylated substances (PFAS). This study investigated PFAS exposure to aquatic organisms of an urban stream (closed 1960s) and a rural pond (with outflow stream; closed 1970s) at two historic landfill sites. Total concentrations of 19 common PFAS reached 30 and 2.6 µg/L, for the stream and pond sites, respectively, within the shallow sediments (epibenthic zone) in hotspot locations within the discharging plume footprint. The overlying surface water (epibenthic and pelagic zones) exhibited substantial PFAS concentration dilution for the stream, but less so for the pond. The landfill-sourced PFAS concentrations of the streams exiting both sites showed substantial dilution, with mass discharge off-site estimated at over 50 and 9 g/yr for stream and pond sites, respectively. Both epibenthic and pelagic zones experienced some seasonal or event-related variation. These findings demonstrate that aquatic organism exposure to PFAS can be substantial at and downstream of historic landfill sites, but can vary markedly between aquatic zones and types of receiving waters. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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