Mercury in the Environment and in Hydroelectric Reservoirs PDF Download

Author: Alain Tremblay
Publisher: Montréal : Great Whale Public Review Support Office
ISBN: 9781895931105
Category : Hydroelectric power plants
Languages : en
Pages : 169

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Author: Marc Marcotte
Publisher: Springer Science & Business Media
ISBN: 364260160X
Category : Science
Languages : en
Pages : 411

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Book Description
Nowadays, major environmental issues are the object of large public debates de spite the fact that scientific knowledge is often insufficient to draw unequivocal conclusions. Such is the case in the ongoing debate regarding the specific contri butions of anthropogenic greenhouse gas emissions and of natural climate changes to global warming. At least 10 to 20 years of additional observations will be re quired, before we will be able to conclude, with certainty, on this subject. In the mean time, and as directed by their immediate interests, people will continue to promote contradictory opinions. The media are, in part, responsible for perpetuat ing such debates in that they convey indiscriminately the opinion of highly credi ble scientists as that of dogmatic researchers, the latter, unfortunately too often expressing working hypotheses as established facts. Naturally, in a similarly mis informed manner, pressure groups tend to support the researcher whose opinions most closely represent either their particular ideological battles or their economic interests and, hence, in their own way, add further to the confusion and obscurity of the debate. Only a few years ago, mercury (Hg)contamination in hydroelectric reservoirs was the object of such media and social biases. At the time, analytical data used to support the discourse were themselves uncertain and numerous hypotheses, often times fanciful, were proposed and hastily "delivered" to the public.

Author: Canadian Electrical Association
Publisher:
ISBN:
Category :
Languages : en
Pages :

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Author: Kenneth A. (Kenneth Alexander) Morrison
Publisher: Montréal : Canadian Electrical Association
ISBN:
Category : Hydroelectric power plants
Languages : en
Pages : 155

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Author: Tsuguyoshi Suzuki
Publisher: Springer Science & Business Media
ISBN: 9780306441165
Category : Mercury
Languages : en
Pages : 516

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Author: Bodaly, R. A. (Richard Andrew)
Publisher: Montréal : North Wind Information Services
ISBN: 9782921505048
Category : Fishes
Languages : en
Pages : 15

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Book Description
Report reviewing the subject of elevated mercury concentrations in fish in hydroelectric reservoirs, including aspects of the cause, severity and duration of contamination.

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 12

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Book Description
The LaGrande hydroelectric complex in the James Bay region of Quebec comprises nine generating stations and requires the impounding of eight reservoirs, involving flooding of over 4,000 square miles of land surface. Flooding of land which contains large quantities of organic material leads to transformation by bacteria of sedimentary inorganic mercury into methylmercury, which in turn bioaccumulates in fish. This paper notes the increase in mercury levels in major fish species in the LaGrande 2 Reservoir and discusses the implications for local Cree populations, who rely on fish as an important food source. The paper evaluates a number of at-source remedial measures aimed at reducing mercury levels in reservoir fish, and describes compensation measures adopted to reduce Cree exposure to mercury while ensuring their traditional way of life. The paper concludes with a case study of the Eastmain-1 project and the compensation measures proposed.

Author: Michael S. Bank
Publisher: Univ of California Press
ISBN: 0520271637
Category : Medical
Languages : en
Pages : 360

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Book Description
"Mercury deposition and contamination is widespread and well documented, and it continues to be a public-health concern for certain sectors of the global human population in both developed and developing countries. This edited volume focuses on integrating the diverse sciences involved in the process of mercury cycling in the environment--from the atmosphere, through terrestrial and aquatic food webs, and human populations--to develop a comprehensive perspective on this important environmental pollutant. Using a systems-level approach, this book provides recommendations on mercury remediation, risk communication, education, and monitoring. In response to a growing need for understanding the cycling of this ubiquitous pollutant, the science of mercury has grown rapidly, expanding into several interdisciplinary fields and encompassing such disparate academic and scientific disciplines as biogeochemistry, economics, sociology, public health, decision sciences, physics, global change, and mathematics. Only recently have scientists really begun to establish more holistic approaches to studying mercury pollution, giving rise to investigations that have furthered the integration of a multi-tiered approach, especially by using chemistry, biology, and human health sciences collectively. The study of mercury pollution has produced a variety of contributions to domestic and international policies related to the management of mercury in the environment"-- Provided by publisher.

Author: Xinbin Feng
Publisher: Springer
ISBN: 9811067198
Category : Science
Languages : en
Pages : 421

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Book Description
This book presents an intensive study on the biogeochemical cycle of mercury in a river-reservoir system in Wujiang River Basin, the upper branch of the Yangtze River. Six reservoirs located in the mainstream of the Wujiang River and their corresponding inflow/outflow rivers were selected for inclusion in this study, which was conducted by researchers from the Institute of Geochemistry, Chinese Academy of Sciences. The concentration and distribution of Hg in reservoirs (the water column, sediment, sediment pore water), inflow/outflow rivers of reservoirs, and wet deposition in Wujiang River Basin were systematically investigated, and measurements were taken of the water/air exchange flux of gaseous elemental mercury (GEM). On the basis of the data gathered, a detailed mass balance of total mercury (THg) and methylmercury (MeHg) in the six reservoirs was developed. In addition, the book identifies the primary factors controlling Hg methylation in the river-reservoir system in Wujiang River Basin. The accumulation and bio-magnification of Hg species within food chains in reservoirs and human health risk of MeHg exposure through fish consumption are also included in this book.

Author: Luiz D.de Lacerda
Publisher: Springer Science & Business Media
ISBN: 3642587933
Category : Nature
Languages : en
Pages : 168

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Book Description
Due to its inherent characteristics, mercury contamination from gold mining is a major environmental problem compared to past mercury contamination from industrial point sources. The worsening of social-economical conditions and increasing gold prices in the late 1970s resulted in a new rush for gold by individual entrepreneurs for whom Hg amalgamation is a cheap and easily carried out operation. Even after the present-day mining areas are exhausted, the mercury left behind will remain part of the biochemical cycle of the tropical forest. This book reviews the current information on mercury from gold mining, its cycling in the environment and its long-term ecotoxicological impact. The book is illustrated with numerous diagrams and photographs.