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Effect characterization of sediment-associated naphthalene sulfonates (NSAs) on freshwater benthic invertebrates

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Title: Effect characterization of sediment-associated naphthalene sulfonates (NSAs) on freshwater benthic invertebrates
Author: Matten, Kevin
Department: School of Environmental Sciences
Program: Environmental Sciences
Advisor: Prosser, Ryan
Abstract: Naphthalene sulfonic acids (NSAs) are used extensively as anti-corrosive additives in fuels, coatings, and lubricants. However, very little data exist of their potential impact on aquatic ecosystems. The primary goal of this thesis was to evaluate the toxicity of three NSA congeners to aquatic biota. I began by investigating their toxicity in overlying water by observing the impact of chronic NSA exposure on Pimephales promelas eggs, and the acute responses of amphipods, gastropods, and larval mussels. I then compared the toxicological response of two benthic invertebrates, Hyalella azteca (amphipoda) and Tubifex tubifex (oligochaeta), exposed to NSA via spiked substrates containing 0% or 2% organic carbon. NSA toxicity was significantly decreased by the presence of organic carbon. I also assessed the potential for NSA to bioaccumulate in freshwater mussels and oligochaetes and observed minimal accumulation. This study concluded that environmentally relevant concentrations of NSAs pose minimal hazard to benthic biota.
URI: http://hdl.handle.net/10214/17434
Date: 2019-09
Rights: Attribution 4.0 International
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Attribution 4.0 International Except where otherwise noted, this item's license is described as Attribution 4.0 International