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 17 of 17 for “"inorganic mercury"”.
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A study of the removal of inorganic mercury by adsorptive bubble separation methods
A study of the removal of mercury (I I) from solution by separate adsorptive bubble {adsubble) methods, namely foam fractionation and precipitate flotation, is presented in this thesis. The results indicat the applicability of an adsubble method as a polishing stage for mercury containing …
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Interactions of Inorganic Mercury and Inorganic Cadmium with Biomimetic and Complex Biological Membranes and their Influence on Membrane Packing and Size
Inorganic mercury (Hg2+) and Inorganic Cadmium (Cd2+) are toxic heavy metals linked to the development of cancer, diabetes and neurological dysfunctions. The effect of these metals on the fluidity and phase transition (Tm) of biomimetic and polar extract membranes was investigated using Laurdan …
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Novel MRI Contrast Agents Based on Functional DNA and Nanomaterial Conjugates for Biomedical Applications
… one micron liposomes can be used to detect inorganic mercury in water. At the same time, we have shown that chelators of inorganic mercury can be encapsulated in liposomes and released upon mercury detection.
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Cardiovascular effects of lead and mercury and their mixtures in rats
… some environmental pollutants, e.g. lead and mercury, can adversely affect cardiovascular health. Despite the increasing amount of knowledge from human and animal studies, cardiovascular effects of lead, mercury species or their mixtures are not well understood. It is also unknown if safe …
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Geochemical controls on production and transport of methylmercury in the St. Louis River Estuary
The production of methylmercury (MeHg) in freshwater systems is a concern due to its bioaccumulative properties in aquatic food webs and potential neurotoxicity of consumers of fish, including predatory fish, wildlife, and humans. Transformation of inorganic mercury to MeHg is primarily driven by …
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Determination of trace elements in hair for monitoring environmental and occupational exposure
… of antimony, arsenic, cadmium, chromium, lead, mercury and selenium in human hair by ICP-MS were developed. Chemical speciation of mercury and methyl mercury in hair was also achieved using LC-ICP-MS. For the digestion of hair samples the optimum method for these elements was found to be a …
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Field sampling and flow injection strategies for trace analysis and element speciation.
… measurement capability for key trace elements (mercury, lead and chromium) by devising an integrated analytical approach that links the sample collection, sample preservation and laboratory measurements in an unified manner.An introductory chapter first reviews the occurrence of organometallic …
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The potential of immobilied algal cell systems for the removal of mercury from aqueous solution
… Chiorella ernersonii for the removal of inorganic mercury from aqueous solution in batch and continuous-flow processes was inyestigated. Initial experiments showed that HgCl2 added to growth mediun. at I mgg -I r did not markedly affect the growth of non-immobilized Chiorella at io cell …
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Speciation and microbial transformation of chromium, arsenic and mercury in municipal landfill leachate
… waste disposal guidelines. Chromium, arsenic and mercury speciation were investigated in municipal landfill leachate (MLL) to evaluate microbial transformation of the heavy metals in the landfill system. MLL is a complex matrix that contains multiple inorganic and organic contaminants, as well as …
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Application of diffusive gradient in thin-film passive samplers to assess mercury availability and mobility in a fresh water river system
The accurate measurement of mercury in sediment porewater is a challenge using conventional sampling techniques which commonly require removal of sediment, transportation, and processing. Passive sampling is an alternative technique that measures sediment porewater concentrations in-situ and …
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Physiological, population, and genetic responses of an aquatic insect (Isonychia bicolor) to chronic mercury pollution
Responses to sublethal concentrations of mercury were determined and compared for several populations of the mayfly, Isonychia bicolor from sites on two mercury polluted rivers in Virginia (USA). Results from laboratory respiration experiments indicated that small nymphs were more sensitive to …
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Investigation of constructed wetlands capability to remove mercury from contaminated waters
… (c) acidic; and (d) agricultural wastewater. Mercury has been used intensively by wide variety of industries because of its unique properties. Consequently, it was present at various levels in wastewater discharged. The ability of constructed wetlands to serve as a sink of mercury before …
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From Source to Surveillance: An Assessment of Liquid Elemental Mercury Mobilization in Soil, Downstream Reactivity, and Biomarkers of Exposure
<p>Mercury (Hg) is a toxic pollutant whose speciation will highly impact its fate and transformation in the environment. One understudied form is that of liquid elemental mercury (Hg0L), a dense non-aqueous phase liquid which, upon release to the environment, can persist in soil for decades. Over …
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ECOTOXICOLOGICAL IMPACTS OF RUN-OF-RIVER DAMS ON THE AMERICAN DIPPER (CINCLUS MEXICANUS) AND MOUNTAIN STREAM FOOD WEBS
… food webs are also the primary methylators of inorganic mercury (Hg) into its toxic and bioavailable form, methylmercury (MeHg), I further investigated Hg levels in American Dippers and their prey. Despite the observation of distinct dipper isospace between stream types, there was no model …
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Mechanisms of Microbial Formation and Photodegradation of Methylmercury in the Aquatic Environment
<p>Methylmercury is a bioaccumulative neurotoxin that severely endangers human health. Humans are exposed to methylmercury through consumption of contaminated aquatic fish. To date, effective strategies for preventing and remediating methylmercury contamination have remained elusive, mainly due to …
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Biogeochemical Transformations of Trace Element Pollutants During Coal Combustion Product Disposal
… particularly for the toxic elements such as mercury, arsenic, and selenium. This dissertation research focused on the biogeochemical transformations of mercury, arsenic, and selenium associated with coal ash materials in an effort to: (1) define the key environmental parameters controlling …
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Alterations in lymphocyte signalling produced by exposure to mercury
… a polychloride anion with poor lipid solubility, inorganic Hg2+ may produce effects at the outer cell membrane before significant intracellular accumulation, loss of microtubule integrity (a sensitive target) and activation of cell death through apoptotic pathways. The organomercurial compound …