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 18 of 18 for “"Contamination sources"”.
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Evaluating human fecal contamination sources in Kranji Reservoir Catchment, Singapore
… above recreational water quality criteria; their sources and distribution under dry and wet weather are also unknown. The goal of this study was to evaluate the distribution of E. coli under dry and wet weather, to determine the sources of the human fecal contamination, and to validate the use of …
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Atomic absorption spectrometry and its application in geochemistry
… and an attempt to develop "a universal" flame; contamination; sources of errors, etc. The method is applied to the analysis of silicate materials. Problems of sample dissolution and standards preparation are discussed. Applications have been made on the determination of the alkali metals …
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Development and application of techniques for evaluating the success of local groundwater protection programs
… of the unique characteristics of aquifers and contamination sources, local groundwater protection programs were found to be the most comprehensive; however, it was discovered that no universally accepted method existed to measure their effectiveness. An evaluation method was developed to …
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Addressing produce safety educational resources for non- English speaking growers in the Midwest
… access to culturally relevant educational resources. These gaps hinder their ability to comply with U.S. produce safety standards. The purpose of this research was to identify the specific needs of refugee growers to support the development of effective educational materials. The objectives …
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Applicazione delle tecniche elettrosmotiche alla consolidazione dei fanghi di risulta dei processi mineralurgici
… in the form of considerable and numerous sources of pollution. One of the most important problems is linked to the tailing basins which represent around 40% of the mining waste in the territory. The risk these pose is related to the huge volume of the deposited material, to its chemical …
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Artificial reef creation using decommissioned pipeline protection structures - environmental performance in the North Sea.
… To assess suitability of reuse, heavy metal contamination of decommissioned mattresses was examined. Mattresses exhibited metal concentrations below historic averages in the NS, with no variation observed depending on distances from contamination sources. The evidence from this thesis can …
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Estar Con el Agua al Cuello: Spanish-Language Communications for Equitable Water Policy Development in California's Southern Central Valley
… of inadequate systems compounded with industrial contamination, residents of the area face a severe lack of access to clean drinking water. The residents of Kern and Tulare Counties, primarily low-income, Latine, Spanish-speaking, farm worker communities, are left with the difficult decision of …
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An exploration of trypophobia
… particular spectral profile that may resemble contamination sources (e.g., skin lesions).
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Water quality studies in Kranji Catchment, Singapore : use of organic tracer and PEDs for identifying potential sewage sources
… serve as indicators of potential human fecal contamination sources to the Kranji Reservoir in Singapore that could be used as confirmation indicators along with bacteria indicators. The compounds chosen as potential tracers were nonylphenol and nonylphenol ethoxyltes (NPEOs), as these are …
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Pathogen Indicator Monitoring In The Ross Barnett Reservoir
… waters, pathogen indicator monitoring is used. Sources of pathogens may include stormwater runoff, failing septic systems, lake-bottom sediments, and animals and humans in direct contact with the water. A collaborative study to investigate potential pathogen contamination in the Reservoir is …
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Human Adenoviruses As Indicators Of Faecal Contamination And Pathogen Indices In The Environment And Shellfish
… HAdVs and HPyVs are suitable indices for viral contamination from faecal sources. Furthermore, due to their continued occurrence in the environment and their host specificity, these viruses also have potential for microbial source tracking applications. However, one caveat identified was the …
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Identifying water contamination from fossil fuel development using geochemical and isotopic fingerprints
… risks fossil fuel development pose to water resources. Previous studies have identified negative impacts on water quality associated with the storage and disposal of coal combustion residuals, oil sands process-affected water, and oil and gas wastewater, as well as leaking of methane to …
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Machine Learning Driven Source Identification, State Estimation and Sensor Optimization in Water Systems
… such as considering only single, non-reactive contamination sources or static sensor configurations. In addition, these methods typically rely on computationally intensive physics-based models like EPA-SWMM and EPA-NET. As a result, these conventional methods lack the scalability required for …
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Multi-Property Internal Flow Field Quantification using Molecular Filtered Rayleigh Scattering
… of FRS is that it is very susceptible to signal contamination from particles and surfaces illuminated by the probing laser source. The effects of these contamination sources of the FRS signal are quantified as a function of their intensity relative to the Rayleigh scattered light. As the most …
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Unveiling Origins and Dynamics of Fecal Indicator Bacteria in an Urban Creek
… waterways are highly vulnerable to bacterial contamination, which presents significant risks to public health and water quality. Common methodologies typically measure the total concentration of fecal indicator bacteria (FIB) but are unable to address the complex sources of contamination …
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‘Organics in ice’: Novel organic compounds in ice cores for use in palaeoclimate reconstruction
… begins with an investigation in to the possible contamination sources of the target compounds in ice core samples. It attempts to quantify the threat of contamination throughout the drilling, storage and analyses processes. It finds there is substantial presence of organic compounds in media used …
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Ricerca delle fonti di contaminazione in acquedotti e fognatura: definizione di un approccio integrato
Negli ultimi anni la qualità delle acque potabili e reflue ha suscitato crescente preoccupazione a causa della diffusione di contaminanti di interesse emergente (es. PFAS, farmaci) e dei loro impatti ambientali. In questo contesto, la tesi presenta un approccio integrato per il monitoraggio …
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Fundamental Study of Particle Formation, Transport, Deposition and Filtration for Semiconductor Applications
… smaller. Preventing and controlling particle contaminations is essential in the semiconductor manufacturing process to increase semiconductor yield. Examples of these unwanted nanoparticles in the semiconductor industry are airborne molecular contamination (AMC), haze, and deposited …