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 21 for “"Water pollutants"”.
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Evaluation and testing of a novel photocatalytic reactor with model water pollutants.
… of harmful chemical compounds from air and water. It couples low-energy ultraviolet light with semiconductors acting as photocatalyst and thereby overcoming many of the drawbacks that exist for the traditional water treatment methods. Recent literature has established the potential of this …
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Foreign direct investment, governance, and the environment in China: regional dimensions
… foreign investment has positive effects on water pollutants and a neutral effect on air pollutants. Such effects vary across pollutants and investment from different sources.
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The cognitive apprehensions regarding drinking water among educated Americans and Arabs living in Middletown
… the cognitive apprehensions regarding drinking water quality (DW) in Muncie, Indiana, USA. The comparison was between two different, culturally elite groups using constructive-grounded theory. Eighteen semistructured interviews were conducted with both Arab (n=9) and American (n=9) participants. …
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Planar waveguide enzyme sensors coated with nanocomposite membranes for water pollution monitoring.
… monitoring typically agricultural and industrial water pollutants. The Si[3]N[4] surface of the waveguide sensing window was coated with nanocomposite polyelectrolyte selfassembled (PESA) membranes containing cyclotetrachromotropylene (CTCT) indicator and enzymes. The reaction of three enzymes …
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Exploring the Relationship between Environmental Operations and Supply Chain Practices, Complementary Assets, and Performance
… depletion of natural resources, global warming, water pollutants and hazardous waste; the environmental focus has now become more valuable and significant to researchers. This dissertation is focused on examining how environmental management system and environmental supply chain practices can be …
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Synthesis, Modification, and Application of Colloidal Aluminum Nanoparticles
… for its use as a capture layer for organic water pollutants, enabling their detection using surface-enhanced Raman scattering. Using this platform, we developed a low-cost assay capable of sub part-per-billion pollutant detection. Second, we develop a method for the chemical synthesis of …
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Monitoring and regulating cyanobacterial metabolites (microcystins and geosmin) in aquatic systems.
… can have a major financial impact on the potable water and aquaculture industries (taste and odour compounds). Understanding the factors that affect cyanotoxin production can help in exploring means for the control of these secondary metabolites. One of the most prominent cyanotoxins are …
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Aqueous Atmospheric Species, a Dual Study: 1. Comparison of the Effects of Temperature, Oxygen Level, Ionic Strength, and pH on the Reaction of Benzene with Hydroxyl Radicals at the Air-water Interface to the Bulk Aqueous Phase. 2. Determination of Carbonyl Compounds in Fog Water Samples via Online Concentration and HPLC
The air-water interface is the largest interface in the environment. Atmospheric droplets, such as fog, which can have an exceptionally high surface area-to-volume ratio, also have a large range of physical and chemical properties (e.g. temperature, pH, ionic strength, and chemical composition) …
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The Effect of Antecedent Dry Time on Water Quality Inflow and Outflow to Wet Ponds and Pollutant Removal Efficiency
Storm water is a significant source of pollutants in urban areas. Urbanization results in reduced water quality of surface waters due to the loss of vegetation and pervious areas, and increased impervious cover, pollutant loading, and volume and velocity of storm water runoff. The potential for …
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Investigation into an adsorption and electrochemical regeneration process for the treatment of two trace level pesticides
The presence of organic micro-pollutants in aquatic systems and drinking water is of concern in most highly populated regions of the planet. Extensive surveys of major river systems in Europe and the United States have measured a wide array of organic contaminants including industrial chemicals, …
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Interaction of emerging contaminants at the colloidal and planar interfaces : influence on environmental fate and transport
… chemistry plays in the fate and transport of pollutants. The overarching aim of this thesis has been to investigate adsorption of selected emerging pollutants to colloids and elucidate how these surface interactions influence their fate and mobility in aquatic systems. Research presented here …
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Mixing and secondary circulation in Juan de Fuca Strait
Estuaries, the regions where runoff of fresh water, soil, and contaminants first encounter the ocean, are also primary fishing and recreation areas. It is therefore important to understand the dynamics associated with mixing and currents within these bodies of water. Pollutants and fresh water from …
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Synthesis, characterization and application of polyacrylamide grafted bioflocculants (TMT-1-g-PAM 2 and TST-1-g-PAM 3)
Water pollution is one of the major problems in the world. It contributes to water scarcity. Grafted bioflocculants have been found to have excellent wastewater remediation capabilities. Therefore, they have become one of the main research focal points in recent times as flocculants. The high …
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Volatile organic compounds in seawater
… and solid adsorbent trapping were applied to seawater and related samples to concentrate volatile organic compounds. The concentrates were subsequently analyzed by glass capillary gas chromatography and combined gas chromatography-mass spectrometry. The compound identities and the spatial and …
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A Comparative Microbial Composition Assessment of Stormwater, Urban Runoff and Wastewater
… bacteria (FIB) in urban runoff (n = 96), stormwater (n = 8), and wastewater (n = 16). We quantified the densities and reductions of E. coli and Enterococcus, in raw stormwater, treated urban off from the Santa Monica Urban Runoff Recycling Facility (SMURRF) and wastewater from the Eastern …
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Synthesis and Characterisation of Layered Double Hydroxides (LDHs) Using Red Mud and their Environmental Applications
… high removal capacity for organic and inorganic water pollutants as adsorbents. Two RM samples were sourced from Aluminium-Oxide Stade GmbH (AOS) in Germany and Aughinish Limerick plant in Ireland, respectively. In the first part of this thesis, a thorough characterisation of RM raw materials was …
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Experimental and kinetic modelling of multicomponent gas/liquid ozone reactions in aqueous phase. Experimental investigation and Matlab modelling of the ozone mass transfer and multicomponent chemical reactions in a well agitatated semi-batch gas/liquid reactor.
Due to the ever increasing concerns about pollutants and contaminants found in water, new treatment technologies have been developed. Ozonation is one of such technologies. It has been widely applied in the treatment of pollutants in water and wastewater treatment processes. Ozone has many …
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Organic carbon dynamics of the Neches River and its floodplain.
… Big Thicket National Preserve is a large blackwater river that has an extensive forested floodplain. Organic carbon was analyzed within the floodplain waters and the river (upstream and downstream of the floodplain) to determine the amount of organic carbon from the floodplain that is …
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