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Updated: May 20, 2025

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Investigating Long-Distance Transport of Perfluoroalkyl Acids in Wheat via a Split-Root Exposure Technique

Published on: September 28, 2022

Digging deep: microbial PFAS-degradation in landfill sediments.

E W Omagamre¹, G F Custer¹

¹Department of Natural Sciences, University of Maryland Eastern Shore, Princess Anne, MD, USA.

Trends in Microbiology

|March 25, 2025

Summary

Per- and polyfluoroalkyl substances (PFAS) pose health risks. This study explores challenges to PFAS biodegradation and identifies unique landfill environments as potential sites for microbial breakdown of these persistent chemicals.

Keywords:

Per- and polyfluoroalkyl substances biodegradation bioremediation microbial enzymes microbiome xenobiotics

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Area of Science:

Environmental Science
Microbiology
Ecotoxicology

Background:

Per- and polyfluoroalkyl substances (PFAS) are persistent environmental pollutants with known detrimental effects on human and ecological health.
Current biodegradation strategies for PFAS are limited by the chemical stability and recalcitrance of these compounds.
Understanding the factors that inhibit or promote PFAS breakdown is crucial for developing effective remediation technologies.

Purpose of the Study:

To identify and discuss the key obstacles hindering the biodegradation of per- and polyfluoroalkyl substances (PFAS).
To examine the chemical and microbial ecotoxicological challenges associated with PFAS degradation.
To explore the potential of unique landfill environments as novel niches for promoting PFAS biodegradation.

Main Methods:

Literature review and synthesis of existing research on PFAS chemistry and microbial interactions.
Analysis of ecotoxicological data pertaining to PFAS impacts on microbial communities.
Comparative assessment of environmental conditions within buried landfills relevant to xenobiotic degradation.

Main Results:

PFAS biodegradation is impeded by their strong carbon-fluorine bonds and diverse chemical structures.
Microbial ecotoxicity of PFAS can inhibit the activity of key degradative microorganisms.
Buried landfills present unique eco-evolutionary conditions, including anaerobic environments and specialized microbial consortia, that may facilitate PFAS breakdown.

Conclusions:

Overcoming PFAS pollution requires addressing both chemical recalcitrance and microbial limitations.
Underexplored landfill environments offer promising, yet challenging, xeno-ecological niches for advancing PFAS biodegradation research.
Further investigation into landfill microbial communities and geochemistry is warranted to harness their potential for PFAS remediation.