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 13 of 13 for “"Arsenic and lead"”.
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Sources of arsenic and lead in drinking water of Eastport, Perry, and Pleasant Point, Maine
Lead and arsenic in drinking water are a health risk to communities throughout the world; lead can be a problem in houses with old piping systems with either lead piping or 50/50 lead solder, and groundwater in Maine contains high arsenic concentrations. This study sought to determine the …
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Assessing the Phytoextraction of Organic and Inorganic Pollutants From Point Pelee National Park, Ontario and Iqaluit, Nunavut
… investigated the phytoextraction of both organic and inorganic contaminants from two locations of Canada (Point Pelee National Park (PPNP), Ontario and Iqaluit, Nunavut). PPNP is a National Park that is highly contaminated with dichlorodiphenyltrichloroethane (DDT), dieldrin, arsenic and lead from …
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Historical Use of Lead Arsenate and Survey of Soil Residues in Former Apple Orchards in Virginia
… pesticides including natural chemicals such as arsenic, copper, lead, and sulfur have been used extensively to control pests in agriculture. Lead arsenate (PbHAsO4) was first used in apple orchards in the late 1890's to combat the codling moth, Cydia pomonella (Linnaeus). The affordable and …
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Metals Distribution in Roadside Soils and Himalayan Blackberries in Victoria, BC, Canada
… metal contamination in roadside soils and Himalayan Blackberry plants across Greater Victoria, BC. Arsenic (As) and lead (Pb) concentrations in soil samples in some areas exceeded BC Contaminated Sites Regulation soil standards, indicating contamination hotspots linked to high traffic. …
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Survey of Health Effects among Residents Adjacent to a National Priority List Site in Ssouthwest Virginia.
… (1895–1972) of an electrolytic chlorine and caustic soda plant. A cross-sectional study was conducted to determine disease prevalence among Saltville Medical Center (SMC) patients. Diseases associated with chronic exposures to mercury, arsenic, and lead were reviewed in patient records …
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A Survey of Superfund Chemicals in Massachusetts Farms
Heavy metals and organic pollutants in the environment can present a public health threat, and understanding how different pollutants are distributed in our agricultural resources and in the food chain is fundamental to predicting and preventing their negative health impacts. The purpose of this …
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Abandoned Mine Land Impacts on Tributaries in the Upper Yakima River Watershed, Eastern Cascades, Washington
Effluent from abandoned mine lands (AMLs) in several drainages in Washington’s Eastern Cascades flows into the Yakima River. Similar sites in Idaho and Colorado are known producers of heavy metals and acid mine drainage. I determined the effects of nine AMLs on water quality in four tributaries to …
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The Toxic Legacy of the Gold Rush
… gold mining in California was highly extractive and industrial, and continued well into the 20th century. Over time, miners developed increasingly invasive means of getting at the gold, adding chemical additives like mercury and cyanide to make the process more efficient and bringing up toxic …
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Geochemical and Microbial Controls of Groundwater Quality in Northwestern Liberia
Years of conflict, political instability, and national emergencies have left behind very little information on water resources in Liberia, West Africa. This research leverages major ion and trace element analysis, Escherichia coli (E. coli) field tests, and high-throughput sequencing of microbial …
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Geohydrologic evaluation of a proposed coal-ash disposal site near Mandan, North Dakota
… megawatt coal-fired power plant, located near Mandan, North Dakota. In the process of generating electricity, MDU's Heskett Station produces approximately 62,000 tons of coal-ash annually. The ash has been disposed of by above-ground stockpiling on the plant site for the past 35 years. Limited …
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Metal and Metalloid Contaminants in Atmospheric Aerosols from Mining Operations
… crushing, grinding, smelting, refining, and tailings management, are a significant source of airborne metal and metalloid contaminants such as As, Pb, Cd and other potentially toxic elements. Dust particles emitted from mining operations can accumulate in surrounding soils, natural waters …
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Compound Events and Exposure Science: Characterizing Mixtures and Assessing Cumulative Risks Using Participatory Research Methods
… to systemic inequities, industrial proximity, and inadequate regulatory protections, with climate change further exacerbating these risks. This work explored environmental exposure in a diverse range of environmental justice communities, including border, mining and urban communities. This …
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Arsenic and other trace elements in Bangladeshi food and non-food and their relationship to human health
… that over 30 million people are exposed to arsenic from drinking contaminated groundwater in Bangladesh. Furthermore, due to the use of contaminated water for irrigation purposes, arsenic and other toxic elements are entering the food chain of Bangladeshis. In this thesis, the total levels …