Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Sorption Coefficients"”.
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Influence of pH and NOM on Sorption of Phenols onto Aquifer Material
Geosorption processes play an important role as retardation mechanism in subsurface transport of organic water constituents. Geosorption behaviour of Ionisable Hydrophobic Organic compounds (IHOCs) especially influence of dissolved natural organic materials on their sorption coefficients is poorly …
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Fate of Current-use Pesticides in the Canadian Atmosphere
… laboratory experiments measured the equilibria sorption coefficients for chemicals on XAD-2 resin, allowing the determination of a new predictive equation for equilibria sorption coefficients, and thus interpretation of the range of applicability of both XAD-based PAS and active air samplers …
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Fate and Bioavailability of Per- and Poly-Fluorinated Substances (PFASs) in Soils
… soil environment. The thesis investigates the sorption and bioavailability of three commonly reported perfluoroalkyl acids (PFAAs) in a wide range of soils with varying properties and determines if sorption coefficients and bioaccumulation can be predicted from soil properties and are affected …
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Effects of soil moisture, soil carbonate and organic matter content on vapor phase sorption of volatile organic compounds using inverse gas chromatography
Sorption of VOCs from the vapor phase to soils is an important variable in predicting VOC contaminant movement in unsaturated soils. Experiments were performed which evaluated the effects of soil moisture, carbonate, and organic matter content on VOC sorption. Sorption measurements were performed …
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Fate and Transport of Endocrine Disrupting Compounds during Wastewater Treatment: The Role of Colloidal and Particulate Material
… by filtration, and used to quantify the sorption coefficients for pyrene, 17β-estradiol (E2), and 17α-ethinylestradiol (EE2) by fluorescence quenching. The MLSS-derived colloidal organic carbon (COC) sorption coefficient (Kcoc) for pyrene ranged from (< 1 to 80) L/kgcoc, indicating a …
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Contaminant diffusion and sorption of an artificial leachate in selected geologic barriers of Frankonia, Bavaria, Germany
… geochemistry, mineralogy, physical parameters, sorption and diffusion. A transient double reservoir with decreasing source concentration was designed and constructed using clear polycarbonate cylinders for undisturbed clay plugs of 2 to 4cm thickness. Samples were also fitted with internal …
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Sorption and Biodegradation of Organic Solutes Undergoing Transport in Laboratory-scale and Field-scale Heterogeneous Porous Media.
… first study focused on the magnitude and rate of sorption of hydrophobic organic compounds by two, well-characterized soils. The composition of organic matter had a small effect on the magnitude of the organic carbon normalized equilibrium distribution coefficients. The sorbates sorbed more …
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Moisture transport and fixation in porous materials at high moisture levels
… calculated from the relation between the water sorption coefficients and the initial water content. The method is based on Boltzmann transformation. Knowledge of moisture storage capacity over the hygroscopic range is essential when calculating the moisture content. Generally storage capacity is …
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The mobility of endosulfan and chlorpyrifos in the soils of the Hex River Valley
… was performed on the samples including pesticide sorption experiments in which gas chromatography coupled with electron capture detection and flame photometric detection were employed. The Hex River Valley is a sensitive area because of the intensive agricultural activities and high vulnerability …