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 16 of 16 for “"Atmospheric Mercury"”.
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Atmospheric Mercury Deposition In An Urban Environment
Atmospheric mercury deposition, known to be a major source of mercury to aquatic and terrestrial environments, was studied at an urban site in Orlando, FL. Precipitation sampling was conducted from September 2003 to May 2006 at a Mercury Deposition Network site located on the University of Central …
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Chamber investigations of atmospheric mercury oxidation chemistry
Mercury is a potent neurotoxin even at low concentrations. The unoxidised metal has a high vapour pressure and can circulate through the atmosphere, but when oxidised can deposit and be accumulated through the food chain. This work aims to investigate the oxidation processes of atmospheric Hg0(g). …
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Atmospheric Mercury and Methane in the South-Central U.S.
… characterized temporal and spatial variations of atmospheric mercury and methane (CH4), and investigated their emission sources. Speciated atmospheric mercury observations collected over the period from 2008 to 2010 at the U.S. Atmospheric Mercury Network sites (AMNet) were analyzed. We found …
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Coastal urban atmospheric mercury cycling and emissions in Boston, MA
… to contribute to the body of knowledge regarding mercury emissions by reporting on a coastal, urban setting subject to inputs from both anthropogenic and oceanic reservoirs, in order to improve related policy decisions. Mercury can have serious health and ecological consequences, but the …
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Spatial and Temporal Distribution of Speciated Atmospheric Mercury in Southeastern Texas
… of anthropogenic emissions to the levels of atmospheric mercury in both urban and coastal settings of southeastern Texas. Speciated atmospheric mercury measurements were obtained from the ideally located University of Houston Moody Tower and University of Houston Coastal Center from March 22, …
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Deposition and Fate of Atmospheric Mercury in Forested Landscapes of the Adirondack Park, NY
… I investigated the deposition and fate of atmospheric mercury (Hg) to forested landscapes of the Adirondack region in Upstate New York. Despite the fact that forests are the dominant land cover in North America, there has been relatively little research on the deposition, transport, and …
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Atmospheric Mercury Species In Northern Mississippi: Concentrations, Sources, Temporal Patterns, And Soil-Air Exchange
Mercury is a highly toxic element that is found both naturally and as an introduced contaminant in the environment. The majority of Mercury released to the environment is into the atmosphere, where because of its high volatility and long residence time is dispersed globally. In order to better …
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Development and application of a methodology for measuring atmospheric mercury by instrumental neutron activation analysis
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1995.
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Evaluating Relationships between Mercury Concentrations in Air and in Spanish Moss (<em>Tillandsia Usneoides</em> L.)
<p>Mercury is a potent neurotoxin that is transported globally in vapor form. A major source of mercury contamination to soil, water, and biota is atmospheric deposition. Therefore, comprehensive monitoring of atmospheric concentrations is important. Limitations of conventional atmospheric …
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Elemental and reactive gaseous mercury deposition and diurnal cycles over terrestrial environments
The atmospheric component of the global biogeochemical mercury cycle was studied to determine the mechanisms behind diurnal trends and amplitudes in elemental and reactive gaseous mercury concentrations over terrestrial environments. This analysis was done using the 3D GEOS-Chem chemical transport …
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Simulations and projections of major air pollutants over the United States and uncertainty analyses, effects of natural change and human activities
… contiguous United States due to their effects on atmospheric chemical and physical processes. To understand these effects, the present studies use the global climate chemistry model, CAM-Chem version 3, to systematically assess potential changes in major air pollutants including surface ozone, …
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Mercury emissions inventories in the Lake Superior states
Mercury pollution can cause harmful impacts on human health and the environment, a concern that is magnified in marine environments like the Great Lakes. While there are many local, national, and global efforts to track emissions, one key complication to accurately estimating atmospheric mercury is …
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Evaluation Of A Low Corrosion Method To Increase Mercury Oxidation And Scrubber Capture
… as one of the major contributors of the atmospheric mercury in the Lake Superior basin by the Lake Superior Lakewide Management Plan (LaMP). Mercury is a leading concern among air toxic metals due to its volatility, persistence and bioaccumulation as methylmercury in the environment, and …
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Fine Particle and Mercury Formation and Control during Coal Combustion
… including particulate matter (fly ash) and mercury (Hg), into the atmosphere. This dissertation investigated three aspects of pollutant formation and control from the coal combustion process: (1) organic aerosol formation during coal combustion, (2) mercury removal during coal combustion by …
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Mercury Transport and Fluxes in the Lake Ontario Basin
<p>In this dissertation I assess mercury dynamics in the Lake Ontario Basin. In four interrelated phases, ecosystem mercury concentrations and fluxes were analyzed at increasing scales. Each phase is presented in order of increasing scale, starting with a reach-by-reach analysis in the Seneca River …