Direct measurement of PFAS levels in surface water using an engineered biosensor.

Area of Science:

• Environmental Science
• Analytical Chemistry
• Biotechnology

Background:

• Per- and polyfluoroalkyl substances (PFAS) are widespread environmental contaminants due to their persistence and amphiphilic nature.
• High concentrations of PFAS are found in environmental reservoirs like water and soil, necessitating sensitive detection methods.
• Existing analytical methods for PFAS can be complex and require extensive sample preparation.

Purpose of the Study:

• To demonstrate the application of a novel biosensor for detecting perfluorooctanoic acid (PFOA).
• To assess the biosensor's capability in analyzing surface water samples from a high-contamination area.
• To provide a rapid and straightforward detection method for PFAS in environmental matrices.

Main Methods:

• Development and application of a biosensor utilizing human liver fatty acid binding protein.
• Detection of perfluorooctanoic acid (PFOA) in surface water samples collected near Loring Airforce Base.
• Evaluation of the sensor's performance regarding speed, ease of use, and minimal sample pre-treatment requirements.

Main Results:

• The biosensor successfully detected high levels of PFOA in surface water samples.
• The detection process was rapid and did not require extensive sample pre-treatment.
• The sensor demonstrated ease of use for analyzing environmental samples.

Conclusions:

• A human liver fatty acid binding protein-based biosensor is a viable tool for detecting PFOA in environmental samples.
• This technology offers a simplified and efficient alternative to traditional analytical methods for PFAS detection.
• Future development could lead to broader applications for assessing PFAS contamination across various end-users.