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 19 of 19 for “"Metal Pollutants"”.
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Physiological responses of soybean seeds (Glycine Max L. Merr.) to metal pollutants
… have looked at seeds as potential sources of metals that may enter the food chain, very little research has been carried out to examine the effect of such toxicants on the physiology of these plant parts. This study examines the effect of two metal pollutants, namely Cd and Ni, on the …
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Locating herbarium specimens in online digital repositories to be used in future retrospective analysis of metal pollutants from pre- and post-1960s in the most polluted city in the United States, Chattanooga, Tennessee
… them for the presence and concentration of metals. Chattanooga was declared the most polluted city in America in 1969 from the years 1961-1965 due to unchecked industrial emissions. Factories, railroads, coal furnaces, and iron making were only a few of many industrial operations releasing …
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Understanding the impact of polymer functionalized electrode fabrication and cycling conditions on stability and selective separation of micropollutants
… in order to improve water security. Heavy metal pollutants such as arsenic have diverse physico-chemical properties which renders them intractable in current treatment technologies such as wastewater treatment plants (WWTPs). These pollutants are able to pass through WWTPs and end up in the …
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Volatile metal degassing from volcanoes: source processes, atmospheric transport and deposition
Volcanoes emit metal and metalloid elements in the gas phase at rates that are comparable to industrial emissions of entire countries or regions. These elements (e.g., Cu, Zn, Pb, As, Se), collectively referred to as ‘metal pollutants’ or ‘heavy metals’, can be critical nutrients at low levels, but …
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Characterisation of groundwater in mainly old and closed landfill sites
… increase the leachability and mobility of many metal pollutants and particularly of lead. Studies on the leachability of lead in acetic acid media show how lead solubility is increased in acetic acid media by the formation of triacetatolead(II) species, Pb(CH3CO2)3-.
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Plant-Soil Feedbacks In Heavy Metal Soils
Heavy metal pollution is a major environmental problem. Metal pollutants are long lasting and can be toxic to organisms in all parts of an ecosystem, including humans. Restoring healthy ecosystems in metal contaminated sites is critical for human and environmental health. Plant-soil feedbacks …
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Development of ultrasensitive electrochemical sensors based on nanocomposites for environmental applications
… well. The presence of organic and inorganic micropollutants such as carbamate pesticides and heavy metals in water is a crucial water problem generated from industrial effluents, mining wastes, or domestic sewage, and the widespread use of pesticides in pest control in the environment. In the last …
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The role of Iron Regulated 2 and Iron Regulated Transporter 1 in nickel hyperaccumulation traits in Senecio coronatus
Metal hyperaccumulating plants accumulate exceptionally high concentrations of metal ions in their above ground tissues and are defined as containing 1000 μg/g dry mass Co, Cu, Cr, Pb, Zn or Ni. This is remarkable because plants typically only require small amounts of these metals for survival, …
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Detection of environmental pollution (radionuclides and heavy metals) using microorganisms.
Radionuclide and heavy metal pollutants are a major concern for the environment nowadays as thousands of waste sites around the world pose a serious threat to all living organisms and humans in particular. In order to find an effective technique for the detection of these pollutants and their …
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Determination of Toxic Heavy Metals in Wet Deposition and Ambient Air in Columbus, GA
… One such source of this pollution is heavy metals. The impact of heavy metal pollution on living organisms can be disastrous, having the potential to cause the deterioration of ecosystems and posing danger to the health and survival of the human race. Chronic and acute human exposure to this …
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LITERATURE REVIEW: The Use of Cation-Exchange Resins in Natural Water Trace Metals Research. ARTICLE: Determination of Free Ion Trace Metal Concentrations in Freshwaters Using Cation-Exchange Resin Equilibrium. A Preliminary Investigation.
LITERATURE REVIEW: The desire to measure low metal concentrations in natural waters stems principally from the aim to understand the effects of trace metals on aquatic biota and to understand the fate of metal pollutants. Trace metals rarely exist in the free ion form, with distribution of the …
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Acid biodesulphurisation of coal discards using a heap leaching approach
… effluent produced and precipitating dissolved metals. Treatment methods are divided into active, and passive approaches based on available resources and pollution severity. Active treatment requires continuous use of alkaline chemicals, incurring significant long-term expenses. Passive …
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Mechanisms of cadmium tolerance in Populus
… a known carcinogen and one of the leading heavy metal pollutants on a global scale, is released to the atmosphere through various industrial processes such as smelting and mining and other applications including manufacture of batteries and phosphate fertilizers. It causes many deleterious …
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The Fate and Effects of Contaminants in Estuarine Environments
… estuarine species, not usually screened for pollutants, has been assembled in the context of a number of estuarine systems that have been influenced by a range of anthropogenically generated contamination events. The combined use of diffuse gradient ‘in thin films’ (DGT) and the analysis of …
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Modeling of Groundwater Heavy Metals and Methane Pollution for a Municipal Landfill Utilizing Data Driven and Numerical Modeling Techniques
… the advancement of modeling of groundwater heavy metal pollution and methane generation as the main two concerns in landfilling for a municipal landfill. To better understand the context of thesis, it has been divided into six major studies. The first part of the thesis is on spatial-temporal …
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Investigating the influence of vehicular traffic on a major trunk road on rural air quality
… for higher proportion of total emissions of pollutants resulting in air pollution with its attendant consequences. Although poor air quality concerns has often been linked to urban areas, many rural areas apparently have locations where air quality objectives may be threatened especially in …
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Characterization and kinetics study of activated coconut shells, cow bones and zeolite based adsorbent for pome treatment
… agro-allied wastewater containing both organic pollutants and heavy metals. The discharge of POME into the environment without adequate treatment contributes to diseases affecting humans and aquatic lives. However, there is the necessity to reduce the pollutants to a very low level of discharge …
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Lichens as a biomonitoring tool for detecting heavy metal air pollution associated with industrial activities in Collie, south-western Australia
… effectively to determine the dispersion of heavy metals emitted by industrial point-sources; however the approach has not been commonly used in Australia. This thesis aimed to determine the effectiveness of using a lichen biomonitoring approach to measure the heavy metal pollutants emitted from …
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The terrestrial carbon cycle in transition: tracking changes using novel tracers on multiple timescales
… nutrients (particularly N and P) and trace metal pollutants. Further, during the water treatment process (for human consumption), DOC can form toxic by-products. This project aimed to shed new light on terrestrial carbon dynamics by testing the hypothesis that climate can drive increases in …