Degree

Bachelor of Science (B.S.)

Major(s)

Chemical Engineering

Document Type

Immediate Campus-Only Restricted Access

Abstract

This study investigates the potential synergistic interactions in aquatic environments among three common pollutants: polyethylene microplastics, antibiotics, and surfactants. Using UV-Vis absorption spectroscopy, the penicillin-streptomycin concentration was monitored in solutions containing polyethylene (PE) and one of three surfactants: sodium dodecyl sulfate (SDS), rhamnolipids, and chitosan. The UV-Vis absorption spectra showed increases in absorbance over time for the water control and SDS samples, suggesting potential leaching of additives from the PE. In contrast, the chitosan sample showed no change in absorbance, which could indicate the chitosan acts as a barrier to potential leaching from the PE. The rhamnolipid sample, however, showed clear evidence of a chemical reaction, in the form of a precipitate and gas formation. These findings suggest that interactions among these pollutants could alter their behavior when present together. Such synergistic effects may influence pollutant transport and toxicity, impacting aquatic ecosystems and human health through contaminated water sources.

DOI

https://doi.org/10.54718/LACF1115

Date Defended

4-24-2025

Thesis Director

Dr. Julie Jessop

Second Committee Member

Dr. Anastasia Elder

Third Committee Member

Dr. Amber Pete

Comments

This research was conducted at the University of North Alabama.

Rights Statement

"Synergistic Pollution: Interactions Among Polyethylene, Surfactants, and Antibiotics in an Aquatic Environment", Copyright 2025 by Chloe Puckett. All rights reserved. Note that in addition to my own works of authorship, this thesis may contain and provide citations to third party content. If your use goes beyond fair use, you would need to contact those rights holders for additional licensing/permissions.

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