Microplastics and Per- and Polyfluoroalkyl Substances (PFAS) Analysis in Sea Turtles and Bottlenose Dolphins along Mississippi’s Coast

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dc.contributor.authorNavarathna Chanaka M.
dc.contributor.authorPray Hannah
dc.contributor.authorM Prashan. Rodrigo
dc.contributor.authorArwenyo Beatrice
dc.contributor.authorMcNeely Cassidy
dc.contributor.authorReynolds Henry
dc.contributor.authorHampton Natalie
dc.contributor.authorLape Katherine
dc.contributor.authorKatie Roman
dc.contributor.authorHeath Maddie
dc.contributor.authorStokes Sean
dc.contributor.authorR Sameera. Gunatilake
dc.contributor.authorAriunbold Gombojav
dc.contributor.authorPerez Felio
dc.contributor.authorV. K. G Rooban . Thirumalai
dc.contributor.authorHassan EI Barbary
dc.contributor.authorElsayed Islam
dc.contributor.authorMohan Dinesh
dc.contributor.authorBrown Ashli ,
dc.contributor.authorMoore Debra
dc.contributor.authorReichley Stephen
dc.contributor.authorLawrence Mark
dc.contributor.authorMlsnaTodd E.
dc.date.accessioned2026-04-01T11:22:59Z
dc.date.available2026-04-01T11:22:59Z
dc.date.issued2023-01-18
dc.description.abstractGlobal plastic production and usage has increased annually for decades and microplastic pollutants ( 5 mm) are a growing concern. Microplastics in surface waters can adsorb and desorb harmful chemicals such as per- and polyfluoroalkyl substances (PFAS). Microplastics can accumulate across all tropic levels in the marine food web. The purpose of this research was to analyze the stomach and intestinal contents of stranded (Mississippi coast) bottlenose dolphins and sea turtles for the presence of microplastics and commonly found PFAS, PFOS, PFOA, and GenX. Gut contents were digested (10% KOH in 50% MeOH) and then analyzed for microplastics using pyrolysis gas chromatography-mass spectrometry (Pyro-GC-MS), Nile red microscopy, X-ray photo electron spectroscopy (XPS), and Raman spectroscopy. Digested sample filtrate was pre-concentrated using solid-phase extraction (SPE) before PFAS liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. The PFOS extraction and analysis had 98.6% recovery when validated with certified pike-perch fish reference material. The Nile red testing on most samples revealed the presence of microplastics (Table S1). The Pyro-GC-MS results from two samples confirmed the presence of the plasticizer acetamide. The Raman spectroscopy analysis indicated characteristic plastic peaks corresponding to polystyrene in one sample. PFOS (95.5 to 1,934.5 g/kg) was detected in three dolphin stomach samples. This project is part of a long-term study with the goal of a better understanding of microplastics and PFAS environmental contamination and their impact on bottlenose dolphins and sea turtles.
dc.description.sponsorshipMississippi Department of Marine Resources (Gulf of Mexico Energy Security Act) and National Institute of Health 5T35OD010432.
dc.identifier.citationNavarathna, C. M., Pray, H., Rodrigo, P. M., Arwenyo, B., McNeely, C., Reynolds, H., ... & Mlsna, T. E. (2023). Microplastics and per-and polyfluoroalkyl substances (PFAS) analysis in sea turtles and bottlenose dolphins along Mississippi’s coast. Analytica, 4(1), 12-26.
dc.identifier.issn10.3390/ analytica4010003
dc.identifier.urihttp://hdl.handle.net/20.500.14270/792
dc.language.isoen
dc.publisherMDPI, Basel, Switzerland.
dc.relation.ispartofseries4, 12–26.
dc.subjectmicroplastics
dc.subjectdolphin
dc.subjectsea turtles
dc.subjectPFAS
dc.subjectPFOS
dc.subjectPyro-GC-MS
dc.subjectanalysis
dc.titleMicroplastics and Per- and Polyfluoroalkyl Substances (PFAS) Analysis in Sea Turtles and Bottlenose Dolphins along Mississippi’s Coast
dc.typeArticle

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