Dissertation/Thesis Abstract

Reach-scale predictions of the fate and transport of contaminants of emerging concern at Fourmile Creek in Ankeny, Iowa
by Cullin, Joseph Albert, M.S., The University of Iowa, 2014, 61; 1560631
Abstract (Summary)

Contaminants of emerging concern (CECs) are an unregulated suite of constituents frequently detected in environmental waters, which possess the potential to cause a host of reproductive and developmental problems in humans and wildlife. Degradation pathways of several CECs are well-characterized in idealized laboratory settings, but CEC fate and transport in complex field settings is poorly understood. In the present study I use a multi-tracer solute injection to study and quantify physical transport and photodegradation in a wastewater effluent-impacted stream in Ankeny, Iowa. Conservative tracers are used to quantify physical transport processes in the stream. Use of reactive fluorescent tracers allows for isolation of the relative contribution of photodegradation within the system. Field data were used to calibrate a one-dimensional transport model, and forward modeling was then used to predict the transport of sulfamethoxazole, an antibiotic in the effluent which is susceptible to photolysis. Results show that accurate predictions of reactive CECs at the scale of stream reaches can be made using the fate and transport model based on field tracer studies. Results of this study demonstrate a framework that can be used to couple field tracer and laboratory CEC studies to accurately predict the transport and fate of CECs in streams.

Indexing (document details)
Advisor: Ward, Adam S.
Commitee: Cwiertny, David M., Weirich, Frank H.
School: The University of Iowa
Department: Geoscience
School Location: United States -- Iowa
Source: MAI 53/03M(E), Masters Abstracts International
Subjects: Hydrologic sciences
Keywords: Emerging contaminants, Fate and transport, Photolysis, Streams, Wastewater
Publication Number: 1560631
ISBN: 978-1-321-04042-5
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