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  • Poly- and perfluorinated alkyl substance release from landfills and landfill model reactors

    Creator:
    Allred, Brent McKay
    Abstract:
    Research and public concern of poly and perfluoroalkyl substances (PFASs) as environmental contaminants has increased significantly due to the increasing number of reports of their detection in humans and wildlife. PFASs have a number of commercial applications including surfactants, coatings, polymers, and levelers, which are used on consumer products like...
    Resource Type:
    Dissertation
    Full Text:
    Research and public concern of poly and perfluoroalkyl substances (PFASs) as environmental contaminants

  • Polar organic compounds as tracers of environmental processes

    Creator:
    Medeiros, Patricia Matheus de
    Abstract:
    Sources of polar/water-soluble organic compounds conjunctly with apolar biomarkers were characterized in natural organic matter. This multi-biomarker approach was accomplished by a simple analytical method consisting of extraction with dichloromethane:methanol (2:1, v/v), silylation and analysis by gaschromatography- mass spectrometry (GC-MS). Polar and apolar biomarkers, derived mainly from higher plants and...
    Resource Type:
    Dissertation
    Full Text:
    for the degree of Doctor of Philosophy in Environmental Sciences presented on June 1, 2006. Title

  • Analytical method development for the identification, detection, and quantification of emerging environmental contaminants in complex matrices

    Creator:
    Place, Benjamin J.
    Abstract:
    The development of analytical methods for emerging contaminants creates many unique challenges for analytical chemists. By their nature, emerging contaminants have inherent data gaps related to their environmental occurrence, fate, and impact. This dissertation is a compilation of three studies related to method development for the structural identification of emerging...
    Resource Type:
    Dissertation
    Full Text:
    Environmental Contaminants in Complex Matrices. Abstract approved

  • Chemical and environmental factors affecting pesticide volatilization from turfgrass

    Creator:
    Conway, Michael S.
    Abstract:
    Volatile loss rates of pesticides from turfgrass were measured using the Backward-Time Lagrangian Stochastic Dispersion model (Flesch et al., 1995). Solar radiation, ambient temperature, surface temperature, relative humidity, wind direction, and wind speed were monitored continuously. Growth regulator was applied to the turf plot several days before pesticide application to...
    Resource Type:
    Masters Thesis
    Full Text:
    Master of Science in Toxicology presented on December 18, 2002. Title: CHEMICAL AND ENVIRONMENTAL

  • Long-term fertilizer input influences total and bioavailable metal in agricultural soils and crops

    Creator:
    Pérez, Angela L.
    Abstract:
    Protection of the quality and integrity of food supplies is of global concern. Crops can accumulate non-nutritive and sometimes toxic metals and metalloids. Accumulated metals/metalloids can come in part, from fertilizers, which may contain variable levels of non-nutritive metals or metalloids such as arsenic (As), cadmium (Cd), lead (Pb), nickel...
    Resource Type:
    Dissertation
    Full Text:
    Toxicology Head of the Department of Environmental and Molecular Toxicology

  • Mercury distribution in sediments and uptake into an aquatic food web at Cottage Grove Reservoir, Oregon

    Creator:
    Morgans, Donna L.
    Abstract:
    The Cottage Grove Reservoir has been impacted by a point source (Black Butte Mine), where mercury mining and processing has occurred within its watershed from the 1890's to the late 1960's. Total mercury concentrations in surface sediments transect samples, core samples, tributary samples, and representative food web species were measured...
    Resource Type:
    Masters Thesis
    Full Text:
    , Representing Toxicolo Chairman of Environmental and MoTécu1ar Toxicology Program I understand that my thesis

  • Determination of fluorochemicals in waste-dominated aqueous systems

    Creator:
    Huset, Carin A.
    Abstract:
    While fluorochemicals have been detected all over the world and in wastewater treatment plants, the effect of wastewater effluent on the receiving waters has not been evaluated. In the first study, the mass flow of fluorochemicals emanating from wastewater treatment plants along the Glatt River in Switzerland was evaluated. The...
    Resource Type:
    Dissertation
    Full Text:
    …………………………………………………….. 3 Toxicology …………………………….……………………….. 4 Environmental fate and distribution.…………………………… 6

  • Human Exposure to PAHs in Air, Water, and Crayfish

    Creator:
    Paulik, L. Blair
    Abstract:
    There are many links between exposure to environmental pollution and risks to human health. While advances in the fields of toxicology, exposure science, and environmental chemistry have shown light on many of these links, many more research challenges remain. One major challenge is how to accurately characterize the toxicity of...
    Resource Type:
    Dissertation
    Full Text:
    : ______________________________________________________ Kim A. Anderson There are many links between exposure to environmental pollution and risks to

  • Assessing Chemical Dispersants Used During the Deepwater Horizon Oil Spill : Method Innovation and Application

    Creator:
    Perkins, Matt J.
    Abstract:
    Large quantities of the chemical oil dispersant Corexit were applied in the Gulf of Mexico (Gulf) in response to the Deepwater Horizon oil spill. Large data gaps regarding the potential transport, persistence and impact of Corexit in the Gulf existed at the time of the emergency response. Analytical methods for...
    Resource Type:
    Dissertation
    Full Text:
    the support of environmental monitoring and laboratory experiments. The work presented in this