PFAS in a seepage lake sediment core: insights into atmospheric deposition of PFAS

McClung, Samantha

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https://hdl.handle.net/2142/122948 Copy

Description

Title

PFAS in a seepage lake sediment core: insights into atmospheric deposition of PFAS

Author(s)

McClung, Samantha

Issue Date

2024-04-24

Keyword(s)

• PFAS
• per- and polyfluoroalkyl substances

Abstract

Per- and polyfluoroalkyl substances (PFAS) are a large family of persistent contaminants with diverse and poorly characterized sources. Our understanding of their environmental cycling is improving, but is still quite limited. The presence of PFAS in environmental media (e.g., sediments, surface water, ice) from remote areas has revealed significant gaps in our understanding of the sources, fate, and transport of PFAS. In particular, the importance of atmospheric transport of PFAS as a pathway into surface hydrologic systems is poorly understood. To investigate the role of atmospheric deposition as a source of PFAS to lake sediments in the Great Lakes region, a sediment core from Loaine lake–a secluded Minnesota lake with primarily atmospheric inputs–was dated and analyzed for 37 target PFAS. This presentation will share initial results from this seepage lake sediment core, which is one component of a larger effort to constrain PFAS wet-deposition (rain and snow) across the Great Lakes. In this larger effort, wet deposition and lake sediment samples from across the Great Lakes will be used to investigate the relative importance and tracers of atmospherically deposited PFAS. The core presented here represents an atmospheric end-member for this larger work.

Has Part

https://youtu.be/K2kvSyOlNzM

Type of Resource

• still image
• text

Language

eng

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