Water Resources Research Act Program

Details for Project ID CO_2024_Sharp

Molecular-level investigation of diel cycling on PFAS precursor fate in photosynthesis­ influenced sediments and surface waters

Institute: Colorado
USGS Grant Number:
Year Established: 2024 Start Date: 2024-10-01 End Date: 2027-09-30
Total Federal Funds: $310,000 Total Non-Federal Funds: $310,000

Principal Investigators: Jonathan O. Sharp

Project Summary: This research aims to understand how per- and polyfluoroalkyl substances (PFAS) precursors behave in shallow surface waters, particularly in environments influenced by daily solar cycles. PFAS are widespread, toxic environmental contaminants. The chemical structure of certain PFAS (termed precursors) can be altered directly by microorganisms or, conversely, abiotically due to environmental factors such as ultraviolet light, fluctuating acidity and water oxygen concentrations that result from photosynthesis by aquatic algae. These chemical transformations lead to smaller molecules that may have different fates and toxicities in the environment and can transform into regulated PFAS compounds. By studying the behavior of PFAS in algae-rich wetland environments, we hope to shed light on their fate and transformation processes. The results will provide valuable information on the behavior of PFAS and aid in developing effective remediation strategies (such as more effective treatment wetlands) to better protect human and environmental health.