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 1320 for “"contaminants"”.
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ORGANIC ENVIRONMENTAL CONTAMINANTS IN FOOD
… to investigate the transfer of atmospheric contaminants into foodstuffs and living plants to develop transfer models to determine if infrequent sampling of air around the food chain is any measure of contamination reaching the consumer. The quantitative aspects of these studies were limited …
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Containment of Organic Contaminants Using Geosynthetics
… can act as a sink to capture and store contaminants and not just as a diffusive barrier. In a typical municipal solid waste landfill (MSW) with good construction quality assurance (CQA), PCBs are unlikely to give rise to environmental concern. However, if CQA allows significant leakage, …
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Bioavailability of organic contaminants in sediments.
… due to the low concentrations of lipophilic contaminants in the environment and their strong affinity for particles and for traditional sampling (filtration and centrifugation) equipment. An equilibrium passive sampling device made of silicone rubber was developed in this research to measure …
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Biological and particulate contaminants in interfaces
… of biological, chemical, or particulate contaminants shapes disease transmission, chemical spills, climate, ecology, and bio-hazard risks. Yet, little is understood on the mechanisms controlling droplet formation and selection of droplet sizes and contamination levels from a contaminated …
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Modelling of toxic contaminants in large rivers.
Dept. of Civil and Environmental Engineering. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1988 .Y845. Source: Dissertation Abstracts International, Volume: 62-13, Section: A. Thesis (Ph.D.)--University of Windsor (Canada), 1988.
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ENVIRONMENTAL CONTAMINANTS IN FARM AND WILD ANIMALS
… between ecosystems, human, animals, and contaminants. This thesis focuses on the environmental contaminants, specifically per- and polyfluoroalkyl substances (PFASs) and trace elements, exploring their absorption and bioaccumulation in farm and wild animals. PFASs, a group of over 7,000 …
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Management of contaminants in low permeability media
To view the abstract, please see the full text of the document.
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Removal of organic contaminants from aqueous systems
… investigates the removal of aromatic organic contaminants (nitrobenzene (NB), aniline (AN), paracetamol (PCT) and hydroquinone (HQ)) from aqueous systems. For NB, this study focusses on removal via both iron reduction and adsorption, while removal of the other three compounds is focussed …
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Analysis and Treatment of Emerging Polar Contaminants
… the detection and treatment of emerging polar contaminants was developed with accompanying instrumentation. A liquid chromatography system, hyphenated to a universal gas phase detector, flame ionization detector (FID), was designed. By using pure subcritical water as a mobile phase, temperature …
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Controlling bacterial contaminants in sugarcane ethanol fermentations
… and environment are important bacterial contaminants. Further studies focused on process optimization and validated the use of antibiotics and acid treatment to reduce ethanol losses due to bacterial contamination. Monensin, penicillin and virginiamycin have been shown to reduce bacterial …
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Removal of organic contaminants from lithographic materials
… into a plasma-based method to clean organic contaminants from lithographic materials constructed an experimental device that demonstrated the removal of both polystyrene latex nanoparticles (representing hydrocarbon contamination) in the range of 30 nm to 500 nm, as well as the removal of 30 …
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Electroosmotic purging of contaminants from saturated soils
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1990.
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Development of Nontargeted Screening Algorithms for Indoor Contaminants
… indoors, but there are thousands of chemical contaminants in indoor environments and the majority of these remain undetected. The focus of this thesis was to develop methods for nontargeted screening and prioritization of previously unreported indoor chemical contaminants using high-resolution …
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Study of contaminants in plasmas during decommissioning processes
… when non-radioactive isotopes of cesium iodide contaminants are introduced. This plasma system produces traces of ionic species of cesium and iodide, as well as space-dependent deposition patterns: both of which are relevant towards understanding behaviour of contaminants in environments …
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Degradation of groundwater contaminants by iron containing systems.
… are effective at reducing common groundwater contaminants. Zero-valent iron particles are an effective remediation technology for groundwater contaminated with halogenated organic compounds. Iron salts were used to generate iron oxide nanoparticles, which were reduced to zero-valent iron. The …
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Detection of contaminants using a MEMS FAIMS sensor
Detecting the presence of contaminants in water is a critical mission, but thorough testing often requires extensive time at a remote facility. A MEMS implementation of a FAIMS (High-Field Asymmetric-Waveform Ion Mobility Spectrometry) sensor has recently been developed, and is capable of promptly …
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The Fate and Effects of Contaminants in Estuarine Environments
… to understand the sources, fates and effects of contaminants. It will permit the development of remediation strategies to improve sustainable practices. The approach taken in the research presented is focused on the measurement of trace elements in sediment, water and biota, and the application …
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