Mercury in Fish, Bed Sediment, and Water from Streams Across the United States, 1998-2005 PDF Download
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Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 88
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Book Description
Author:
Publisher:
ISBN:
Category : Fishes
Languages : en
Pages : 88
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Book Description
Author: Barbara C. Scudder
Publisher: DIANE Publishing
ISBN: 1437921132
Category : Science
Languages : en
Pages : 86
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Book Description
Report on how mercury (Hg) was examined in top-predator fish, bed sediment, and water from streams that spanned regional and national gradients of Hg source strength and other factors thought to influence methylmercury bioaccum. Sampled settings include stream basins that were agr¿l, urbanized, undeveloped, and mined. Predator fish were targeted for collection, and composited samples of fish were analyzed for total Hg (THg), as most of the Hg found in fish tissue is MeHg. Samples of bed sediment and stream water were analyzed for THg, MeHg, and characteristics thought to affect Hg methylation, such as loss-on-ignition and acid-volatile sulfide in bed sediment, and pH, dissolved organic carbon, and dissolved sulfate in water. Illus.
Author:
Publisher: DIANE Publishing
ISBN: 1428984917
Category :
Languages : en
Pages : 48
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Book Description
Author: Jeffrey M. Fischer
Publisher: Geological Survey (USGS)
ISBN:
Category : Science
Languages : en
Pages : 48
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Book Description
Author:
Publisher: Geological Survey (USGS)
ISBN:
Category : Medical
Languages : en
Pages : 444
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Book Description
Author: John Risher
Publisher: DIANE Publishing
ISBN: 143793076X
Category : Health & Fitness
Languages : en
Pages : 457
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Book Description
Selenium (SE) and its compounds are used in photographic devices, gun gluing, plastics, paints, anti-dandruff shampoos, vitamin and mineral supp., fungicides, and glass. It is also used to prepare drugs and as a nutritional feed supp. for poultry and livestock. This profile includes: (a) The exam¿n. of toxicologic info. and epidemiologic evaluations on SE to ascertain the levels of significant human exposure for the substance and the chronic health effects; (b) A determination of whether adequate info. on the health effects of SE is avail. to determine levels of exposure that present a significant risk to human health (SRHH); and (c) Ident¿n. of toxicologic testing needed to identify the types of exposure that may present SRHH. Illus. A print on demand pub.
Author: Kevin Summers
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 232
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Book Description
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309134102
Category : Science
Languages : en
Pages : 316
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Book Description
Some of the nation's estuaries, lakes and other water bodies contain contaminated sediments that can adversely affect fish and wildlife and may then find their way into people's diets. Dredging is one of the few options available for attempting to clean up contaminated sediments, but it can uncover and re-suspend buried contaminants, creating additional exposures for wildlife and people. At the request of Congress, EPA asked the National Research Council (NRC) to evaluate dredging as a cleanup technique. The book finds that, based on a review of available evidence, dredging's ability to decrease environmental and health risks is still an open question. Analysis of pre-dredging and post-dredging at about 20 sites found a wide range of outcomes in terms of surface sediment concentrations of contaminants: some sites showed increases, some no change, and some decreases in concentrations. Evaluating the potential long-term benefits of dredging will require that the U.S. Environmental Protection Agency step up monitoring activities before, during and after individual cleanups to determine whether it is working there and what combinations of techniques are most effective.
Author: Samuel D. Faust
Publisher: CRC Press
ISBN: 9781575040110
Category : Technology & Engineering
Languages : en
Pages : 688
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Book Description
This second edition demonstrates how chemistry influences the design of water treatment plants and how it should influence the design. Historically, water treatment plants have been designed from hydraulic considerations with little regard to chemical aspects. The many chemical reactions used for removal of pollutants from water simply cannot be forced to occur within current designs. This book re-examines this traditional approach in light of today's water quality and treatment. Will current water treatment processes be sufficient to meet future demands or will new processes have to be devised? Chemistry of Water Treatment assesses the chemical and physical efficacies of current processes to meet the demands of the Safe Drinking water Act, providing expert information to persons responsible for the production of potable water into the next century.
Author: Sílvio Vaz Jr.
Publisher: Springer
ISBN: 3030178919
Category : Science
Languages : en
Pages : 393
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Book Description
This book presents a broad range of technologies for sustainable agrochemistry, e.g. semiochemicals for pest management, nanotechnology for release of eco-friendly agrochemicals, and green chemistry principles for agriculture. It provides a concise introduction to sustainable agrochemistry for a professional audience, and highlights the main scientific and technological approaches that can be applied to modern agrochemistry. It also discusses various available technologies for reducing the negative impacts of agrochemicals on the environment and human health.
