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 20 of 32 for “"contaminants of emerging concern"”.
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Fate and Impacts of Contaminants of Emerging Concern during Wastewater Treatment
The purpose of this dissertation was to broadly investigate the fate of antibiotic resistance genes (ARGs) and engineered nanomaterials (ENMs) as representative contaminants of emerging concern in wastewater treatment plants (WWTPs). WWTPs may have their performance impacted by ENMs and may also …
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Understanding environmental influences on bioaccumulation of contaminants of emerging concern among fish species.
By 2050, ~ 70% of the global population will live in urban areas. Concurrently, chemical pollution presents risks to humans and the environment around the world, and chemical production exceeds interventions in many regions. Pharmaceuticals and per-and polyfluoroalkyl substances (PFAS) are two …
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Understanding spatial and temporal aquatic exposure and hazards of contaminants of emerging concern.
Contaminants of emerging concern (CEC) encompass both natural and anthropogenic compounds in the aquatic environment and are of concern to both human and aquatic species exposure. However, we do not have a robust understanding of spatial and temporal exposure to a diverse range of CECs and how …
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Ecotoxicological assessment of galaxolide and tonalide as contaminants of emerging concern in marine ecosystems
… bioaccumulate in aquatic organism. The aim of this PhD thesis was to assess the risk of environmental concentrations of HHCB and AHTN in the marine environments. In order to provide a more complete assessment on marine biota, empirical approach based on data of ecotoxicological assays was …
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Mechanistic insights on the merits and limitations of advanced treatment processes for removal of contaminants of emerging concern
… substances (PFASs) are recalcitrant contaminants of emerging concern that have widespread distribution in water sources, and exhibit potential to persist and bioaccumulate. Non-destructive and destructive remediation strategies have been actively investigated to remove PFAS. …
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Nanofiltration Rejection of Contaminants of Emerging Concern from Municipal Water Resource Recovery Facility Secondary Effluents for Potable Reuse Applications
<p>As reuse of municipal water resource recovery facility (WRRF) effluent becomes vital to augment diminishing fresh drinking water resources, concern exists that conventional barriers may prove deficient and the upcycling of contaminants of emerging concern (CECs) could prove harmful to human …
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Evaluating the Occurrence, Fate and Human Health Risks of Contaminants of Emerging Concern in the Atlantis Managed Aquifer Recharge Scheme
… in water-scarce regions. However, the quality of these recharge waters is a concern, as they often contain contaminants of emerging concern (CECs) that may persist in groundwater and pose risks to human health if left untreated. This study aims to evaluate the impact of MAR on groundwater …
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Occurrence and Control of Microbial Contaminants of Emerging Concern through the Urban Water Cycle: Molecular Profiling of Opportunistic Pathogens and Antibiotic Resistance
In an era of pervasive water stress caused by population growth, urbanization, drought, and climate change, limiting the dissemination of microbial contaminants of emerging concern (MCECs) is of the utmost importance for the protection of public health. In this dissertation, two important subsets …
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Sorption and bioaccumulation of neutral and ionizable wastewater-derived contaminants of emerging concern: exposure of edible crops via solid and liquid effluent streams
Diverse contaminants of emerging concern (CECs) are ubiquitous in waste streams. Batch sorption tests with sludge solids from wastewater treatment systems examined sorption to the solid phase of CECs during wastewater treatment. Compounds, including neutral, acidic and basic CECs, were evaluated …
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Towards an understanding of synthetic glucocorticoid hazards in aquatic systems.
… within the cytoplasm. Here I examine occurrence of these endocrine disrupting contaminants of emerging concern in surface waters and wastewater effluent, identify discrepancies in detection methods, advance an understanding of cross-species susceptibility, and define mechanisms associated with …
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Modeling the transport of sucralose, an anthropogenic tracer, in an effluent dependent watershed with the Soil and Water Assessment Tool during an extreme drought.
Contaminants of emerging concern (CECs) in rapidly urbanizing watersheds represent an area of increasing attention. The Soil and Water Assessment Tool (SWAT), has been used for numerous water quality and quantity assessments, but CEC studies using SWAT are limited. Because the North Bosque …
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Evaluating non-point source microplastic pollution and its impact on biota in the Huron River
<p>Contaminants of emerging concern (CECs), like microplastics and pharmaceuticals, are a growing threat to aquatic ecosystems across the globe. Microplastics can be transported into waterways through a myriad of sources, including point sources such as wastewater treatment plants (WWTPs) and …
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Evaluation of Soil Aquifer Treatment in a Lab Scale Soil Column Experiment
… aquifer recharge has been studied as a method of providing additional environmental barriers to pathogens and contaminants in indirect potable reuse (IPR) applications. A soil column study was conducted by Hampton Roads Sanitation District in order to evaluate the effectiveness of SAT, as a …
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Evaluation of Contaminant Removal Through Soil Aquifer Treatment by a Lab Scale Soil Column Experiment Including a Trace Contaminant Spike Test
Soil aquifer treatment (SAT), the removal of contaminants during percolation through soil, is a strategy employed in managed aquifer recharge (MAR), one method of indirect potable water reuse. As part of Hampton Roads Sanitation District's (HRSD) MAR project, The Sustainable Water Initiative for …
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CHARACTERIZATION OF SEPTIC SYSTEM WASTEWATER AND MUNICIPAL SOLID WASTE LANDFILL LEACHATE
… a corresponding increase in the use and release of contaminants of emerging concern (CECs). The increasing volume and changing composition of waste poses new challenges for waste management and the protection of ecosystem, surface water, and groundwater resources. In the U.S., most domestic solid …
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Treatability of emerging contaminants in wastewater treatment plants during wet weather flows
… (PPCPs), also enter the wastewater stream. Some of these nontraditional contaminants are not efficiently removed by the treatment process at the wastewater treatment plant. Emerging contaminants (ECs) have been identified in surface waters receiving wastewater effluents and have been found to …
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Interactions between titanium dioxide nanoparticle exposure and grazing organisms on periphyton biomass and community composition.
… dioxide nanoparticles (TiO₂NPs) are important contaminants of emerging concern, due to their ubiquity and use in such a broad range of consumer products. Freshwater ecosystems represent the most important aquatic reservoir for TiO₂NPs. Outdoor stream mesocosm and indoor stream microcosm …
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Organometallic redox-interfaces for selective electrochemical separations
… application due to high energetic costs and lack of chemical selectivity. This work explores redox-electrodes as a platform for targeting aqueous and organic contaminants with high separation factors, in the contexts of environmental water remediation, chemical product purification in organic …
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