Particle partitioning and vertical distribution PFAS (Per- and Polyfluoroalkyl Substances) in a stratified freshwater drainage lake, Lake Monona, WI.

Gorski, Patrick

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https://hdl.handle.net/2142/121777 Copy

Description

Title

Particle partitioning and vertical distribution PFAS (Per- and Polyfluoroalkyl Substances) in a stratified freshwater drainage lake, Lake Monona, WI.

Author(s)

Gorski, Patrick

Issue Date

2023-04-18

Keyword(s)

• PFAS
• eutrophic dimictic lake
• thermal stratification

Geographic Coverage

Lake Monona, Wisconsin, United States

Abstract

Lake Monona is a eutrophic dimictic lake, and therefore exhibits typical thermal stratification in the summer with an anoxic hypolimnion. Lake Monona also contains elevated surface water concentrations of PFAS (Per- and Polyfluoroalkyl Substances) and has PFAS-related fish consumption advisories on several fish species. The goals of this study were: 1) Measure PFAS in both the particulate-bound and dissolved phases in water, since previous methods did not distinguish between phases, and 2) Collect water samples during stratification from surface to 1 m from the bottom to compare with other water quality parameters. Results indicate that PFAS occurs primarily in the dissolved phase (~80% average) as opposed to particulate (~20% average). Although several PFAS were detectable in the dissolved phase, the most prevalent PFAS in the particulate phase was PFOS. In the vertical water column total PFAS concentrations remained relatively consistent from top to bottom (within +/- 1 ng/L), consistent in relative proportion of dissolved to particulate, and did not correspond to other parameters which varied with depth like temperature, dissolved oxygen, alkalinity, pH, conductivity, total organic carbon and chlorophyl a.

Has Part

https://youtu.be/GjjUVBAIhkQ

Series/Report Name or Number

2023 Emerging Contaminants in the Environment Conference

Type of Resource

• text
• moving image

Language

eng

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