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 19 of 19 for “"semi-volatile organic compounds"”.
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Toward an Understanding of Children’s Exposure to Semi-Volatile Organic Compounds in the Indoor Environment
The prevalence of smoking has declined significantly from the middle of the last century in most developed nations. Since the mid-1990s however, the rates of decline have slowed and prevalence of smoking among young women is projected to rise in some countries (World Health Organization, 2011; …
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Semi-Packed Micro Gas Chromatography Columns
… premier technique for separation and analysis of volatile and semi-volatile organic compounds. Miniaturization of analytical systems has become a major trend which is mainly driven by advancements in microfabrication techniques and a need for portable lab-on-a-chip systems for onsite monitoring. …
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Feasibility of sustainable recycling of drill cutting as additive in flexible base
… (TPH) mobility but had minimal effect on semi-volatile organic compounds (SVOCs) and increased trace metal leaching. Cement significantly improved compressive strength but had limited effect on TPH and SVOCs mobility. Its performance was reduced in the presence of hydrocarbons due to …
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Surface-Layer Semivolatiles Impact on Hydrochar Application For Fuel and Environment
… in this dissertation focus on the extraction semi-volatile organic compounds from the surface of hydrochar known as secondary char (SC). Over the past decade, studies have shown SC to be a hinderance in HC application for fuels and the environment, due to early burn-out time and phytotoxicity …
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Impact of an Epoxy Pipe Lining Material on Distribution System Water Quality
… metals, disinfectant consumption, total organic carbon (TOC), semi-volatile organic compounds (SVOCs), disinfectant byproduct (DBP) formation, and odor. Results of the study showed relatively low impacts on water quality, as all USEPA drinking water regulations were met. Impacts were …
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Particle-chemical interactions and environmental chemodynamics of fine and ultrafine particles in a natural disaster scenario
… chemicals from the water column, and release volatile and semi-volatile organic compounds to the gas phase upon exposure to air. Ultrafine particles which are photoreactive can degrade these vapor-phase contaminants, and may transform the molecules into species which are more toxic or …
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Developing Reference Materials for VOC, Formaldehyde and SVOC Emissions Testing
Volatile organic compounds (VOCs) and semi-volatile organic compounds (SVOCs) constitute important classes of indoor contaminants. Emissions of VOCs and SVOCs from myriad building materials and consumer products cause high indoor concentrations with health risks that may be orders-of-magnitude …
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Investigation into the partitioning of Lindane between air and dust in indoor environments
The investigation of harmful semi volatile organic compounds (SVOC) in the indoor environment is important because on average people spend over 90% of their time indoors. Lindane, an SVOC which was widely used in the UK until 2004, adsorbs to house dust. House dust acts as a reservoir for such …
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Molecular Dynamics of Interfacial Phenomena at Air/ice, Air/water, and Air/salt Water Interfaces
… research is to investigate the adsorption of organic contaminants, namely polycyclic aromatic hydrocarbons (PAHs) and green leaf volatiles (GLVs), as well as their interactions with reactive oxygen species (ROSs) on atmospheric air/water and air/ice interfaces. In another series of projects, …
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Molecular Simulation Study of Oil Hydrocarbons, Dispersants and Other Organics in Atmospheric Air/Water Interfaces
… is to study the interfacial properties of organic contaminants, in particular green leaf volatiles (GLVs), oil hydrocarbons [mainly intermediate-volatile organic compounds (IVOCs) and semi-volatile organic compounds (SVOCs)], as well as surfactant species (i.e. DOSS and Span 80) from …
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Improved mass spectrometry characterization of organic compounds using analyte preconcentration and radio-frequency ionization.
… technique that can be used for analysis of organic compounds in diverse areas of research including biomedical, environmental, and forensic sciences. Detection and identification of volatile organic compounds (VOCs) in real world samples, which are often present at low concentrations and …
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Method Development For Concentration Measurements of SVOCs and Analysis of Ambient Samples
Semi-volatile organic compounds (SVOCs) comprise a wide range of toxic pollutants in the atmosphere. Phenols, polycyclic aromatic hydrocarbons (PAHs) and n-alkanes are specific examples of SVOCs that are the focus of this project. SVOCs are compounds with intermediate vapour pressures and can exist …
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Emissions of Phthalate Plasticizer from Polymeric Building Materials
… fundamental mechanisms governing emissions of semi-volatile organic compounds (SVOCs) from polymeric materials and their subsequent interaction with indoor surfaces and airborne particles was developed. The emissions model is consistent with analogous mechanistic models that predict emission of …
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Secondary organic aerosol formation of relevance to the marine boundary layer
… chlorine atom (Cl) is a potential oxidant of volatile organic compounds (VOCs) in the atmosphere and is hypothesized to lead to secondary organic aerosol (SOA) formation in coastal areas. The purpose of this dissertation is to test this hypothesis and quantify the SOA formation potentials of …
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Droplet and Particle Dynamics in Aerosol Reactors and Environmental System
… the impact of harmful aerosols on human health. Semi-Volatile Organic Compounds (SVOCs) are very common indoor pollutant which are present in every household. These compounds can phase-partition and exists in the air in both gas and particle phase. Diffusion denuders are used to separate gas and …
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SPECIATION STUDIES FOR BIOGENIC VOLATILE ORGANIC COMPOUNDS AND SECONDARY ORGANIC AEROSOL GENERATED BY OZONOLYSIS OF VOLATILE ORGANIC COMPOUND MIXTURES
… atmosphere; the latter process forms secondary organic aerosol (SOA). One of the important sources for SOA is the oxidation of volatile organic compounds (VOCs) by OH radicals, NOx, and O3. Aerosol can be visualized as suspended solid or liquid particle which is in equilibrium with surrounding …
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Modeling study of the hygroscopic, optical, and cloud-activation properties of aerosols from biofuel combustion
… population mixing state are co-emission of semi-volatile organic compounds (SVOCs) or emission at small aerosol sizes. SVOC co-emission can be the main factor determining CCN activity for hydrophobic or small aerosols. Coagulation limits emission of CCN to about 1016 per kg of fuel. …
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Monitoring of atmospheric polycyclic aromatic hydrocarbons through optimization of analytical techniques
… portable denuder devices for the monitoring of semi-volatile organic compounds (SVOCs), with most attention being given to the United States Environmental Protection Agency (US EPA) priority PAHs. These portable PDMS samplers are currently being analyzed by direct thermal desorption using a …
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Characterizing the Binding Potential, Activity, and Bioaccessibility of Peroxisome Proliferator Activated Receptor Gamma (PPARγ) Ligands in Indoor Dust
… and activation of several groups of major semi-volatile organic compounds (SVOCs) that are ubiquitously detected in indoor environments, including flame retardants such as polybrominated diphenyl ethers (PBDEs) and Firemaster 550 (FM550), and other SVOCs such as phthalates, organotins, …