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 15 of 15 for “"Toxic Pollutants"”.
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Photochemically produced reactive species generation by extracellular organic matter sensitizers from Chlamydomonas reinhardtii
… cycling and bioavailability, attenuation of toxic pollutants, and inactivation of pathogens. Recent studies observed enhanced transformation of organic micropollutants in UV and visible light irradiated algae suspensions where photogenerated 1O2 and •OH were detected. The photochemistry in …
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Uncertainties in estimates of the oxidative capacity of the urban atmosphere : a modeling and measurement approach
… in the MCMA indicate that the emissions of these toxic pollutants are similar or higher than for some US cities. We derived approximate historical trends of the VOC/NOx emission ratio and quantified the impact of changes of mobile emission sources on the photochemical levels using the Brute Force …
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The Removal of Trace Organic Impurities from Water using Activated Charcol Cloth
… widespread dissemination in the environment as toxic pollutants and the availability of relevant detailed information about them. The adsorption capacity of the cloth was found, using the Freundlich isotherm, to be between three and four times greater than for granular charcoal, under normal …
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Assessing the Social Acceptability of Endophyte-Assisted Phytoremediation of Polycyclic Aromatic Hydrocarbons: A Case Study at Gas Works Park
… aromatic hydrocarbons (PAHs). PAHs are toxic pollutants that have been shown to have numerous negative health effects. The primary form of remediation at Gas Works Park has been capping, which is usually considered a temporary remediation strategy since it does not remove contaminants …
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Oxidation of atmospheric organic carbon : interconnecting volatile organic compounds, intermediate-volatility organic compounds, and organic aerosol
… and biogeochemical forcers, and in some cases as toxic pollutants. The lifecycle of atmospheric organic carbon is extremely complex, with reaction in multiple phases (gas, particle, aqueous) and at multiple timescales. The details of the lifecycle chemistry (especially the amount and properties of …
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Evaluation and testing of a novel photocatalytic reactor with model water pollutants.
… potential of this powerful technology to destroy toxic pollutants dissolved or dispersed in water. However, to date, very few viable pilot plants exist using this technology. In this study, the application of photocatalysis for the removal of contaminants from waste water discharges such as …
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Reaction mechanisms of hydrocarbon and mercury systems in the atmosphere and in combustion: A theoretical study of thermochemical and kinetic properties
… alternative fuels and to reduce the emissions of toxic pollutants. The objective of this dissertation is to present thermochemical, kinetic and modeling results on two reference fuels (the land vehicle fuel isooctane and the jet fuel JP-10), on smaller cyclic alkanes and ethers, and on the …
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Toward Local Brownfield Regeneration: Factors Affecting People's Attitude and Preference of Brownfield Landscape
… Participants tend to associate these types with toxic pollutants that are likely to adversely affect the health, thus, it would be important to reassure people regarding safety concerns. The expert interviews with brownfield program managers of many localities (Roanoke, VA; Portland, OR; Toledo, …
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Colorimetric sensor arrays with a pre-oxidation method for gaseous analytes
… discrimination of the most commonly found indoor pollutants is achieved at various concentrations, including their immediately dangerous to life or health (IDLH), permissible exposure limit (PEL), and 20% of the PEL concentrations. The array with the pre-oxidation has shown excellent performance …
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Method Development For Concentration Measurements of SVOCs and Analysis of Ambient Samples
… 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 in the …
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Improving the measurement of butyltin compounds in environmental samples
Tributyltin compounds (TBT) are highly toxic pollutants, mainly introduced to the environment as a marine antifouling agent. The main aim of this work was to evaluate the present methods for the measurement of TBT and its breakdown products dibutyltin and monobutyltin in environmental sediments and …
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Magmatic and volcanic processing of volatile and chalcophile elements
… from serving as essential nutrients to becoming toxic pollutants, highlighting their significant environmental implications. Metal assemblages in volcanic gas plumes vary systematically with tectonic setting. Arcs tend to be more enriched in lead, thallium, and bismuth compared to hotspots. …
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Investigations on the development of a novel hybrid sensor for environmental monitoring applications.
Heavy metal toxicity is a major environmental problem world-wide. Increased spreading and high concentration levels of the toxic heavy metals in water environments have posed a severe threat to human health and the ecosystem. Over the years, to improve the drinking water quality standards, safe …
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Science to support toxics governance : tracking mercury and other pollutants from policy to impacts
… within them, in our efforts to manage these toxic pollutants. In the first study, I investigate the social and technical factors that affect the domestic implementation of a global environmental treaty (the United Nations Minamata Convention on Mercury) in major emitter countries in Asia, and …
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Conservation ecology of the Cape clawless otter, Aonyx capensis, in an urban environment
… conflict and the bioaccumulation of toxic pollutants. The Cape clawless otter, Aonyx capensis, is the most widely distributed otter species in southern Africa and persists in human-modified habitats, including large cities. The Cape Peninsula provides a unique opportunity to study the …