Grantee Research Project Results
2020 Progress Report: PFAS UNITED: Poly - and Perfluoroalkyl Substances - U.S.National Investigation of Transport & Exposure from Drinking Water and Diet
EPA Grant Number: R839482Title: PFAS UNITED: Poly - and Perfluoroalkyl Substances - U.S.National Investigation of Transport & Exposure from Drinking Water and Diet
Investigators: Higgins, Christopher , Illangasekare, Tissa , Adgate, John L. , Stapleton, Heather , Knappe, Detlef , Hoppin, Jane , Carignan, Courtney , Duckorth, Owen
Current Investigators: Higgins, Christopher , Illangasekare, Tissa , Adgate, John L. , Stapleton, Heather , Knappe, Detlef , Hoppin, Jane , Carignan, Courtney
Institution: Colorado School of Mines , Duke University , Michigan State University , University of Colorado at Denver , North Carolina State University
EPA Project Officer: Packard, Benjamin H
Project Period: May 1, 2019 through April 30, 2022 (Extended to March 31, 2024)
Project Period Covered by this Report: May 1, 2020 through April 30,2021
Project Amount: $1,964,375
RFA: National Priorities: Per- and Polyfluoroalkyl Substances (2018) RFA Text | Recipients Lists
Research Category: Ecological Indicators/Assessment/Restoration , Climate Change , Water , Water Quality
Objective:
The goal of this study is to develop a comprehensive set of data related to the fate, transport, and bioaccumulation of poly- and perfluoroalkyl substances (PFASs) and resultant human exposure. This study seeks to fill the data gaps on the fundamental environmental behavior of overlooked PFASs, the uptake into local food sources in impacted communities, and the relevance of that uptake for human exposure to PFASs.
Progress Summary:
As of the two-year mark, we have held one in-person team meeting with all collaborating institutions and two virtual introductory Advisory Board meetings. Thus far in the research we have successfully achieved the following:
- Obtained soil samples and completed preliminary sorption experiments.
- Completed transport experiments using PFAS-impacted groundwater and began data analysis.
- Developed extraction methods and performed analysis of berries, and working to develop additional fruit and vegetable methods.
- Determined the PFAS uptake of plants grown in PFAS-treated water.
- Completed transpiration stream concentration factor (TSCF) experiments using a plant pressure chamber on tomato plants, as well as preliminary experiments on hydroponically-grown soybeans.
- Analyzed xylem sap and evaluated retention time relative to TSCFs.
- Initiated design of secondary nutrient root solution reservoir chamber.
- Developed and validated PFAS extraction method for Market Basket analysis.
- Initiated studies of samples collected from residences in Parchment, MI.
- Collected food samples from MI Farmer’s Markets and notified farmers of testing plans.
- Conducted method development for air samplers, and began collection of blood and wristband samples.
- Initiated Michigan biomonitoring study.
- Ran analyses of datasets via PCA-MLR.
Future Activities:
- Conduct experiments to determine kinetics, extent, and reversibility of PFAS sorption to a range of soils.
- Model the breakthrough of compounds in PFAS-impacted groundwater.
- Develop a better model for air-water interfacial sorption predictions of PFASs.
- Validate PFAS extraction method for additional plants and vegetables, and perform analyses.
- Complete analysis of greenhouse-collected samples, and conduct Phase 2 and 3 of greenhouse experiments to determine crop uptake of PFASs.
- Conduct additional TSCF experiments on tomatoes and soybeans, and analyze xylem sap and root solutions.
- Perform extraction and analysis of Market Basket samples and residential soils collected in Parchment, MI.
- Analyze residential water and serum collected in Parchment, MI.
- Begin recruitment and collections of indoor air, house dust and wristband samples as part of Michigan biomonitoring study.
- Summarize and report-back results to participants and community members in Michigan.
Journal Articles on this Report : 1 Displayed | Download in RIS Format
Other project views: | All 17 publications | 8 publications in selected types | All 8 journal articles |
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Type | Citation | ||
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Herkert N, Kassotis C, Zhang S, Han Y, Pulikkal V, Sun M, Ferguson P, Stapleton H. Characterization of Per-and Polyfluorinated Alkyl Substances Present in Commercial Anti-fog Products and Their In Vitro Adipogenic Activity. ENVIRONMENTAL SCIENCE & TECHNOLOGY 18;56(2). |
R839482 (2020) |
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Supplemental Keywords:
PFAS, drinking water, food, contaminants, exposureRelevant Websites:
Progress and Final Reports:
Original AbstractThe perspectives, information and conclusions conveyed in research project abstracts, progress reports, final reports, journal abstracts and journal publications convey the viewpoints of the principal investigator and may not represent the views and policies of ORD and EPA. Conclusions drawn by the principal investigators have not been reviewed by the Agency.