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The Impacts Of Legacy Mining Operation On Inorganic Arsenic Bioaccumulation And Exposure In Yellowknife Northwest Territories Canada
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Book Synopsis The Impacts of Legacy Mining Operation on Inorganic Arsenic Bioaccumulation and Exposure in Yellowknife, Northwest Territories, Canada by : Claudia Tanamal
Download or read book The Impacts of Legacy Mining Operation on Inorganic Arsenic Bioaccumulation and Exposure in Yellowknife, Northwest Territories, Canada written by Claudia Tanamal and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Arsenic transfers and toxicology are important topics of research and a public health concern because arsenicosis affects millions of people worldwide every year. One of the most significant sources of arsenic in the environment is industrial wastes, such as by-products of mining operation. In Yellowknife, Northwest Territories, Canada, there were two large gold mines-Giant Mine and Con Mine, along with dozens of small-scale mines. The combined by-product of emission from these roasters might have contributed to high concentrations of arsenic found in the city. This thesis presents the results of two related studies to address the environmental health concern: (1) to investigate the arsenic transfers and arsenic species accumulation in freshwater food webs near large legacy mining operations in Yellowknife, and (2) to assess the long-term health risk of inorganic arsenic exposure from the consumption of fish in Yellowknife among the general residents and the Yellowknives Dene First Nation. We found that inorganic arsenic is biominified in food webs (i.e. inorganic arsenic concentrations diminish at higher trophic positions relative to lower trophic positions). Higher-trophic organisms have low inorganic arsenic concentrations in tissue due to biotransformation of inorganic arsenic to non-toxic organic arsenobetaine, and effective elimination of arsenic from their tissue. The trophic positions of freshwater organisms can be used to predict the range of arsenic concentrations and its species composition, accounting for more than 80% of variance. Dietary study results show that the Yellowknives Dene First Nation consumed significantly more fish in their diets (adults: 19 g/day, children: 9 g/day) compared to the general residents of Yellowknife (adults: 9 g/day, children: 5 g/day). Our probabilistic risk assessments showed no significant long-term non-carcinogenic and carcinogenic health risks of inorganic arsenic exposure from fish consumption for the majority of Yellowknife residents, but elevated cancer risks among the adult heavy fish consumers in Yellowknife. However, our data suggested that the residents of Yellowknife were not exposed to higher cancer risks from inorganic exposure compared to the general population in Canada. Therefore, due to fish health benefits and the values associated with its consumption, fish should continue to be a major source of sustenance in Yellowknife.
Book Synopsis Arsenic Exposure in Workplace Areas of Giant Yellowknife Mines Limited, Yellowknife, Northwest Territories, July 1976 by : Canada. Medical Services Branch. N.W.T. Region
Download or read book Arsenic Exposure in Workplace Areas of Giant Yellowknife Mines Limited, Yellowknife, Northwest Territories, July 1976 written by Canada. Medical Services Branch. N.W.T. Region and published by . This book was released on 1976 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Paleo-Ecotoxicology of Yellowknife (Northwest Territories, Canada) Lakes Impacted by Historic Gold Mining Activities by : Ajay Arjoon Persaud
Download or read book Paleo-Ecotoxicology of Yellowknife (Northwest Territories, Canada) Lakes Impacted by Historic Gold Mining Activities written by Ajay Arjoon Persaud and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores the ecological impacts of legacy arsenic contamination on Cladocera (Branchiopoda, Crustacea) from historic gold mining in Yellowknife lakes (Northwest Territories, Canada) using a paleo-ecotoxicological approach. I examined Cladocera subfossils preserved in the modern and pre-1850 lake sediments of 23 lakes in the region, and the Daphnia resting egg bank of Pocket Lake, a highly contaminated lake in which striking ecological changes were previously recorded. Cladocera assemblage changes since pre-1850 were dependent on local, lake-specific limnological conditions. Littoral/benthic taxa dominated the cladoceran assemblage of the most contaminated lakes, while pelagic Bosmina were dominant in lakes with low arsenic. No viable Daphnia resting eggs were found in Pocket Lake, indicating that future resurrection ecology studies from Daphnia populations are not feasible. My research provides new information on the ecotoxicological effects of arsenic contamination in lake ecosystems, and the potential of using Cladocera as paleo-ecotoxicological indicators.
Author :M. R. Falk Publisher :[Winnipeg] Resource Management Branch, Fisheries Operations Directorate, Central Region, Fisheries and Marine Service, Department of the Environment ISBN 13 : Total Pages :106 pages Book Rating :4.:/5 (31 download)
Book Synopsis Biological Effects of Mining Wastes in the Northwest Territories by : M. R. Falk
Download or read book Biological Effects of Mining Wastes in the Northwest Territories written by M. R. Falk and published by [Winnipeg] Resource Management Branch, Fisheries Operations Directorate, Central Region, Fisheries and Marine Service, Department of the Environment. This book was released on 1973 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reports the findings of investigations of the mining effluent of the Giant and Con gold mines near Yellowknife, N.W.T., and the Echo Bay and Terra silver-copper mines on Great Bear Lake, N.W.T., conducted in summer, 1972.
Book Synopsis Arsenic Exposure in Workplace Areas of Yellowknife Gold Mines and Mills, Northwest Territories by :
Download or read book Arsenic Exposure in Workplace Areas of Yellowknife Gold Mines and Mills, Northwest Territories written by and published by . This book was released on 1975 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concluded that workers in the Yellowknife gold mills are not unduly exposed to harmful arsenic-in-air concentrations.
Book Synopsis Data Supplement to Biological Effects of Mining Wastes in the Northwest Territories by : M. R. Falk
Download or read book Data Supplement to Biological Effects of Mining Wastes in the Northwest Territories written by M. R. Falk and published by Fisheries and Marine Service. This book was released on 1973 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inorganic Arsenic Occupational Exposure Standard by :
Download or read book Inorganic Arsenic Occupational Exposure Standard written by and published by . This book was released on 1977 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determining Natural (background) Arsenic Soil Concentrations in Yellowknife NWT and Deriving Site-specific Human Health-based Remediation Objectives for Arsenic in the Yellowknife Area : Final Report by : Canada. Environment Canada
Download or read book Determining Natural (background) Arsenic Soil Concentrations in Yellowknife NWT and Deriving Site-specific Human Health-based Remediation Objectives for Arsenic in the Yellowknife Area : Final Report written by Canada. Environment Canada and published by . This book was released on 2002 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of Human Health Risks Posed by Arsenic Contamination in Yellowknife, NWT : Final Report by : Canada. Environment Canada
Download or read book Assessment of Human Health Risks Posed by Arsenic Contamination in Yellowknife, NWT : Final Report written by Canada. Environment Canada and published by . This book was released on 2002 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inorganic Arsenic Emissions from Primary Copper Smelters and Arsenic Plants, Background Information for Promulgated Standards by :
Download or read book Inorganic Arsenic Emissions from Primary Copper Smelters and Arsenic Plants, Background Information for Promulgated Standards written by and published by . This book was released on 1986 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Final Report; Yellowknife, Northwest Territories by : Canadian Public Health Association. Task Force on Arsenic
Download or read book Final Report; Yellowknife, Northwest Territories written by Canadian Public Health Association. Task Force on Arsenic and published by . This book was released on 1977 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Study of Arsenic Contamination from the Royal Oak Giant Mine, Yellowknife, Northwest Territories by :
Download or read book A Study of Arsenic Contamination from the Royal Oak Giant Mine, Yellowknife, Northwest Territories written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Data Summary by : Dan Billing
Download or read book Technical Data Summary written by Dan Billing and published by . This book was released on 1977 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Initial report published January 1977. Summarizes all available information on the level of arsenic in various segments of the Yellowknife environment.
Book Synopsis Task Force on Arsenic by : Canadian Public Health Association
Download or read book Task Force on Arsenic written by Canadian Public Health Association and published by . This book was released on 1977 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :NORTHWEST TERRITORIES. GOVERNMENT. AD HOC STANDING COMMITTEE ON ARSENIC. Publisher : ISBN 13 : Total Pages :50 pages Book Rating :4.:/5 (131 download)
Book Synopsis ARSENIC IN THE YELLOWKNIFE ENVIRONMENT - TECHNICAL DATA SUMMARY. by : NORTHWEST TERRITORIES. GOVERNMENT. AD HOC STANDING COMMITTEE ON ARSENIC.
Download or read book ARSENIC IN THE YELLOWKNIFE ENVIRONMENT - TECHNICAL DATA SUMMARY. written by NORTHWEST TERRITORIES. GOVERNMENT. AD HOC STANDING COMMITTEE ON ARSENIC. and published by . This book was released on 1977 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Final Report by : Canadian Public Health Association
Download or read book Final Report written by Canadian Public Health Association and published by . This book was released on 1977 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Arsenic in Plants Important to Two Yukon First Nations by : Heather C. Nicholson
Download or read book Arsenic in Plants Important to Two Yukon First Nations written by Heather C. Nicholson and published by . This book was released on 2002 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
