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 9 of 9 for “"Trace organic contaminants."”.
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Mechanisms of competitive adsorption between trace organic contaminants and natural organic matter on activated carbon
… used in water treatment for removal of various organic micropollutants; nonetheless, the presence of natural organic matter (NOM) in source water can reduce its efficiency for micropollutant removal. NOM has been shown to compete with target contaminant via different mechanisms: direct …
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Removing Soluble Organic Contaminants From Water Supplies by Lime Softening
… of increasing numbers of potentially hazardous trace organic contaminants in drinking water supplies has raised considerable public concern. Lime softening, a commonly used water treatment process, is capable of removing certain soluble organic contaminants; but the types of contaminants that …
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Predicting adsorption isotherms in natural water using polyparameter linear free energy relationships
… drinking water treatment to remove both natural organic matter (NOM) and trace organic contaminants. Adsorption isotherms for trace contaminants in the presence of NOM are needed to predict the performance of activated carbon for removing these compounds, but such data are not available for most …
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Mercury methylation potentials in sediments an ancient cypress wetland using species-specific isotope dilution-GC-ICP-MS: Analytical method development and the effect of sorbent amendments
… mass spectrometry (IDMS) and for isotope tracer experiments. The method was validated using certified reference materials including sediment (NIST 2709), leaves (NIST 1547), and fish-muscle (DORM-3), with recoveries within 8% of Hg certified values. The limit of detection was 0.37 pg, …
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Onsite Remediation of Pharmaceuticals and Personal Care Products in Domestic Wastewater using Alternative Systems Including Constructed Wetlands
… personal care products (PPCPs) and other trace organic contaminants (TOrCs) encompass a diverse group of chemicals that are not currently monitored or regulated in US drinking water or wastewater. Researchers have found low levels of TOrCs in aquatic and terrestrial environments all over …
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Balancing Bromate Formation, Organics Oxidation, and Pathogen Inactivation: The Impact of Bromate Suppression Techniques on Ozonation System Performance in Reuse Waters
… is effective for pathogenic inactivation and organics oxidation: both increasing assimilable organic carbon for biofiltration and eliminating trace organic contaminants which may pose a threat to human health. However, ozone can also form disinfection byproducts such as bromate from the …
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Deactivation and regeneration of immobilized titanium dioxide photocatalysts during treatment of pharmaceutical micropollutants in groundwater
… methods improve, a number of classes of emerging contaminants are being detected in natural waters, including many pharmaceuticals and personal care products (PPCPs). Many of these chemicals are recalcitrant to conventional treatment processes, so new treatment methods are being investigated. …
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Validating Pathogen Reduction in Ozone-Biofiltration Water Reuse Applications
… Given the elevated concentration of dissolved organic matter, relatively higher ozone doses are required in reuse applications when compared with water treatment applications in order to achieve the desired treatment goals (oxidation, disinfection). Pilot scale ozone testing was performed to …
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Elucidating Factors that Impact the Removal of Organic Microconstituents by Ammonia Oxidizing and Heterotrophic Bacteria
Although wastewater treatment plants are a line of defense in minimizing indiscriminate output of microconstituents to natural waters, we do not possess a fundamental understanding of the mechanisms involved in microconstituent removal during wastewater treatment. With this in mind, experiments …