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 118 for “"organic contaminants"”.
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Containment of Organic Contaminants Using Geosynthetics
The use of geosynthetics to contain volatile organic compounds (VOCs) and polychlorinated biphenyls (PCBs) in composite liner systems is evaluated through laboratory and field experiments. Diffusive parameters for benzene, toluene, ethylbenzene, and xylenes (BTEX) and PCBs through geomembranes are …
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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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Removal of organic contaminants from aqueous systems
… research 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 …
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Removal of organic contaminants from lithographic materials
… collectors and to soft defects in the form of organic contamination on the mask. Traditional cleaning methods employ the use of wet chemicals to etch contamination off of a surface, however this is limited in the sub-micron range of contaminant particles due to lack of transport of sufficient …
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When chemistry meets microbiology: Biotransformation of emerging organic contaminants
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2023-12-01
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In-situ photocatalytic remediation of organic contaminants in groundwater
… surface which can oxidise a wide range of organic compounds. The target contaminant is methyl tert butyl ether (MTBE), a popular gasoline additive in the past three decades, which gives the water an unpleasant taste and odour at 20 µg L-1, making it undrinkable. This research consists of …
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Removal of organic contaminants from groundwater by reverse osmosis
… and trichloroethene - as single and multi-solute contaminants. The objectives of the experiments were to determine if poly(ether/urea) membranes could produce a permeate that met maximum contaminant levels (MCL) set by the Safe Drinking Water Act (SDWA) and to correlate membrane performance with …
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Combined effects of bioavailable organic contaminants in the aquatic environment.
… bioavaialable) concentrations of a wide range of organic contaminants in water. At the same time, techniques for partitioning controlled delivery (passive dosing; PD) promise to overcome many of the challenges associated with toxicity testing of hydrophobic substances, which can bias the …
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Multimedia modeling of organic contaminants in the Passaic river watershed
… applied to assess the release of five priority contaminants in the Passaic River Watershed, including: napthalene, toluene, trichloroethylene, 1-1-1 trichloroethane and xylene. The model uses the current releases of contaminants as well as cross-boundary advection to determine the fate and …
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Effects of Capping on Biodegradation of Organic Contaminants in Sediments
… sediments due to its capability to contain contaminants and provide a sound habitat for indigenous biota. This research investigated the effect of capping on biodegradation of organic contaminants in Anacostia River sediments using both experimental and modeling techniques. …
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Fate of emerging organic contaminants in Chinese wastewater treatment plants
… about the widespread occurrence of emerging organic contaminants (EOCs) in the aquatic environment which could pose potential risks to humans and ecosystems. Wastewater treatment plants (WWTPs) are significant sources and major routes of EOCs entering the environment. There is therefore a …
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Removing Soluble Organic Contaminants From Water Supplies by Lime Softening
… 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 can be …
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Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants
… terns may be affected by endocrine-disrupting contaminants. These terns are exposed to non-ortho PCBs which bind to the aryl hydrocarbon receptor (AhR), and lower chlorinated PCBs, hydroxymetabolites of which bind to the estrogen receptor. Our objectives were to document the presence of …
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Biodegradation and Chemical Oxidation of Recalcitrant Organic Contaminants during Water Reuse
… municipal wastewater effluent contains many organic contaminants in trace quantities, which pose potential risks for human health and environmental systems. Pharmaceuticals and personal care products (PPCPs) are one example of trace contaminants that are usually found in treated municipal …
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Potential of Ozone and Hydroxyl Radicals to Degrade Emerging Organic Contaminants
… are necessary for the treatment of emerging organic contaminants. Traditional treatment processes do not filter or treat these contaminants causing humans and animals to come into contact and ingest them, both causing illness. Advanced oxidation processes are a good alternative method, but …
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Feminization in common terns (Sterna hirunda) : relationship to persistent organic contaminants
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Biology, 1998.
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Biodegradation of organic contaminants in subsurface systems: kinetic and metabolic considerations
Groundwater contaminated by organic chemicals from industrial spills, leaking underground gasoline storage tanks and landfills has caused concern about the future of a major source of drinking water. Compounds from industrial sources such as alcohols and phenols are frequently found as groundwater …
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Variations in the biodegradation potential of subsurface environments for organic contaminants
… and pathways involved in the biodegradation of organic contaminants in subsurface environments. Subsurface material was obtained from ten sites in six geographical locations representing diverse environmental conditions. The overall goal was to gain a general understanding of biodegradative …
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