Date of Award

2025

Degree Type

Dissertation

Degree Name

Doctor of Philosophy in Oceanography

Specialization

Chemical Oceanography

Department

Oceanography

First Advisor

Rainer Lohmann

Abstract

The ever-increasing number of anthropogenic chemicals that threaten ecological health such as per- and polyfluoroalkyl substances (PFAS) and organophosphate esters (OPEs) drives the need for a comprehensive understanding of the fate, transport, and transformation of these chemicals, and how the risk is communicated with vulnerable communities. Low-cost and effective detection tools as well as a good understanding of the interactions of these chemicals with biotic and abiotic components is key to identifying holistic solutions. This research presents the results of 1) the characterization and validation of a novel graphene-based passive sampler for detecting OPEs in surface waters, 2) the effect of aqueous media matrices and filter material type for PFAS quantification in phytoplankton, 3) the assessment of PFAS bioconcentration and biotransformation in the lower trophic levels of marine food web (phytoplankton), and 4) an exploratory study of storytelling as a risk communication channel in engaging Indigenous communities. This interdisciplinary work draws from passive sampling technology, organic chemistry, plankton ecology, environmental modeling, and risk communication for a holistic understanding of contaminants fate, bioaccumulation, and risk communication.

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Available for download on Saturday, January 23, 2027

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