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 65 for “"Metal pollution"”.
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Environmental impact of heavy metal pollution in natural aquatic systems
The distribution of heavy metals between soil and soil solutions is a key issue in evaluating the environmental impact of long term applications of heavy metals to land. Contamination of soils by heavy metals has been reported by many workers. Metal adsorption is affected by many factors, including …
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Effects of Heavy Metal Pollution on the Loggerhead Sea Turtle
Historically, heavy metal research on sea turtles has been focused on deceased specimens, limiting the ability to determine if the concentrations of heavy metals affected the health of the individuals. More recently, the collection and analysis of blood samples from live turtles has enabled the …
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Baseline surveys and metal binding proteins as metal pollution indicators
The field of metal determination as a part of pollution studies, has been critically examined and metal pollution may be defined in one simple statement: The presence of metal binding proteins confirms toxic metal pollution. It has been shown that current methods of metal determination in …
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Heavy metal pollution and blackheaded gull (larus ridibundus L.) breeding ecology
Heavy metals in air, soil and water are a global problem and present a growing threat to the environment. These metals may have profound consequences for birds and can cause a number of sub-lethal effects, such as decreased reproductive success. The concentrations of selected heavy metals (As, Cd. …
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Selected molluscs as monitors of metal pollution in coastal marine environments
The potential of bivalve molluscs as monitors of metal pollution in South African coastal marine environments has been investigated using the species Crassostrea gigas, Crassostrea margaritacea, Perna perna and Choromytilus meridionalis. Metal concentrations in these and other species living along …
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Impacts of trace metal pollution, urbanization and aquifer recharge on Spokane River macroinvertebrates
… to determine: 1) accumulation of toxic trace metals in macroinvertebrate tissue, 2) effects of aquifer recharge, and 3) impact of urbanization. I predicted that aquifer inflows of cold, clean water would mitigate effects of pollution, and that reaches above the City of Spokane would be less …
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To Assess the Level of Heavy Metal Pollution in Groundwater in Ilala Dar es salaam
This study aimed at evaluating the level of heavy metal pollution in the groundwater in Ilala Dar es Salaam. The potential sources of heavy metals in Dar es Salaam city include: auto-repair shops, informal sector activity premises, small to large scale industries, on-site sanitation systems, poor …
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Life history and microbiome analysis of freshwater fingernail clams (sphaeriidae) exposed to trace metal pollution
… activities such as mining can contain metal mixtures of nonessential and essential trace metals. The consequences of chronic exposure to metal mixtures on the life history of benthic organisms are unclear, as are the potential effects on host-associated microbial communities. I use an …
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RESPONSES OF RECENT BENTHIC FORAMINIFERA TO METAL POLLUTION IN SOUTH WEST ENGLAND ESTUARIES: A STUDY OF IMPACT AND CHANGE
… Creek, south-west Cornwall in January 1992 of metalled acidic mine water drainage from the recently closed Wheal Jane tin mine. Shortly after this discharge a post-impact study using the responses of Recent benthic foraminifera as indicators of metal pollution was carried out on this Creek …
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An Investigation of Heavy Metal Pollution Impact on Drinking Water Quality in the Birim River Sub-Basin of Ghana
… process. This study aimed to investigate heavy metal pollution in the Birim River Sub-Basin and develop a community participation module to manage the threats of heavy metal pollution the drinking water in surrounding communities. The study was based on 192 samples collected from Kibi and Akim …
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Environmental assessment, documentation and spatial modeling of heavy metal pollution along the Jordan Gulf of Aqaba using coral reefs as environmental indicator
… and used to determine spatial distribution of pollution. The second phase included three 20cm-deep cores obtained from within the industrial zone. These cores were drilled from pre-dated communities, where the growth rate was determined earlier to be 10mm y-1, therefore the core obtained …
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Impact of mine pollution of composition, diversity and structure of plant and ground-dwelling invertebrate communities around Kombat mine tailing dump, Namibia
The impact of heavy metal pollution on vegetation and communities of ground-dwelling invertebrates was investigated at Kombat Mine tailings dump in Namibia. Sixteen transect lines were marked around the dump. Plots, 15m x 15m, were marked at 50m intervals along each transect. Top soils in the …
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The use of lipid profiles from immobilised selenastrum capricornutum in the biological surveillance of freshwaters
… investigated as a potential indicator of heavy metal pollution in freshwater environments. The toxicity of Cu", Zn 2 and Cd2t on algal growth was determined and the effective concentration inhibiting specific growth rate by 50 % (EC5 0) for each metal was found to be 124 pM Cu, 20 pM Zn and 5.7 …
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An assessment of wetland vulnerability to artisanal mining in Zimbabwe
… decline, riverbed sedimentation, and heavy metal pollution. Subsequently, the study investigated in the Umzingwane Catchment, located in southern Zimbabwe as a case study, to analyse variations in water nutrient and metal concentrations in wetlands affected by illegal mining activities along …
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GENOMIC AND PHYSIOLOGICAL INSIGHTS INTO BACTERIAL HEAVY METAL RESISTANCE MECHANISMS FOR ENVIRONMENTAL DECONTAMINATION
The contamination of soils and waters with heavy metals (HM) such as chromium, copper, zinc and cadmium represents one of the most severe environmental challenges, posing risks to ecosystem balance and human health. Microorganisms and plants have evolved a range of mechanisms to tolerate, transform …
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