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 556 for “"Heavy Metals"”.
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Heavy metals in river sediments
… from the River Cynon. The concentrations of heavy metals in the samples were determined by Atomic Absorption Spectroscopy after digestion of the dried sample. A rapid hydrochloric acid/hydrogen peroxide digestion was chosen after a brief comparison with the more traditional nitric/perchloric …
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Effect of Heavy Metals on Bacteria
<p>Heavy metals have become devastating environmental contaminants due to their widespread use in the manufacture of electronics, plastics, batteries and dyes. The discharge of heavy metals into the environment has caused concern about their effects on the ecosystem. Many metals are essential for …
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Effect of heavy metals on salt march biota
… In this study, potential effects of moderate heavy metal contamination in sediments of the urban salt marsh Harrier Meadow, NJ, were evaluated on growth performance of the common salt marsh plant S. patens and associated arbuscular mycorrhizal fungi (AMF) colonizing its roots. Growth …
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Fluorescence Detectors for Proteins and Toxic Heavy Metals
<p>An inexpensive detector for proteins is described. The detection technique was based on two-photon excitation intrinsic protein fluorescence using a visible 532 nm diode-pumped nano laser as the excitation source. Proteins that exhibit intrinsic fluorescence must contain at least one tryptophan, …
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Heavy Metals in Traditionally Used Fruits Among the Lakota
<p>Heavy metals concentrations in soils and plants on and near Pine Ridge Reservation (PRR), SD, are a cause of concern to Oglala Lakota tribal government, particularly because of current and past uranium mining nearby, as well as familiarity with occasional selenium poisoning in livestock. In this …
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Heavy metals partitioning in a stream receiving urban runoff
… at the upstream control station while all other metals were concentrated the least in sediment at the downstream station. Significant (0.95 and 0.99 level) linear correlation coefficients among a majority of stream components were found for Pb and Cu. It appears that urban runoff and stormwater …
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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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Phosphate and thermal stabilization of heavy metals in dredged sediments
… addition and calcination reduced leachability of metals with the combined treatment achieving up to an 89% reduction. In beneficial reuse, the synthetic precipitation leaching procedure (SPLP) revealed that impact to groundwater criteria can be achieved in the treated sediments but will be …
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Transport and adsorption-desorption of heavy metals in different soils
Understanding the reactivity and mobility of heavy metals in soils is indispensable for assessing their potential risk to the environment. In this study, column transport and batch kinetic experiments were performed to assess the sorption-desorption and mobility of Cd, Cu, Pb, and Sn in alkaline …
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Exposure to Heavy Metals in American Robins: Impacts and Implications
… Overall, these findings suggest that exposure to heavy metals in robins is dependent on individual-level physiology and behavior.
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Environmental risk assessment of heavy metals in urban street dust
Environment risk assessment of heavy metals has been widely used as a scientific method for evaluating possible environmental hazards presented in a product, a system and/or an industrial process. The results have been used for setting occupational standards and environmental regulations. However, …
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The removal of pesticides and heavy metals by reverse osmosis
… few years, the contamination by pesticides and heavy metals in surface water and groundwater has increased. Reverse osmosis is a unit process that has demonstrated capacity to remove dissolved pesticides and heavy metals from aqueous solution, and it is therefore worthwhile to consider this …
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Removal of selected heavy metals from wastewater using modified agricultural waste
Submitted in fulfilment of the requirements of the degree of Master of Applied Science in Chemistry, Durban University of Technology, Durban, South Africa, 2023.
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The effect of heavy metals on differentiated neuronal and glial cells
Heavy metal poisoning poses a serious health risk among populations worldwide. The symptoms presented by exposure are varied and depend upon the species of the metal, the age of the individual and the exposure dose. All heavy metals have debilitating effects on the CNS. Children are especially …
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Removal of Heavy Metals Using Modified Limestone Media: Zinc and Cadmium
<p>Heavy metal contamination is a serious concern throughout the world. Increased concentrations in drinking water have many negative impacts on human health. Limestone is an inexpensive and simple media for removing high concentrations of heavy metals from drinking water supplies. Ferric based …
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