Download or read book Control of Mercury Contamination in Freshwater Sediments written by George Feick and published by . This book was released on 1972 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Mercury Contamination in Freshwater Sediments written by George Feick and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Mercury Contamination in Freshwater Sediment written by George Feick and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Mercury Pollution in Sediments written by Ivan C. Smith and published by . This book was released on 1972 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Control of Mercury Pollution in Sediments written by and published by . This book was released on 1972 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Pollution Control in Stream and Lake Sediments written by James D. Suggs and published by . This book was released on 1972 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mercury contamination enters streams and lakes from a variety of sources. It becomes sorbed onto the sediments where it resides in dynamic equilibrium with the dissolved species in the suprajacent water column. A means must be found to remove mercury from sediments without destroying the environment or otherwise upsetting the ecological balance. The problem of mercury immobilization and removal was addressed by evaluating a number of recoverable sulfur based getter systems. Examples of these are: Elemental sulfur deployed as a coating on a recoverable meshwork, and Thiourea type organic compounds dispersed in a recoverable matrix. In the course of these evaluations several improved getter system combinations became obvious and these were also included into the scope of this research. Only natural sediments and waters were used to prepare test aquaria in order to simulate natural conditions as nearly as possible.

Download or read book Control of mercury pollution in sediments written by Curtis C. Harlin and published by . This book was released on 1972 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water and Sustainable Development written by National Research Council and published by National Academies Press. This book was released on 2004-05-14 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experts in the areas of water science and chemistry from the government, industry, and academic arenas discussed ways to maximize opportunities for these disciplines to work together to develop and apply simple technologies while addressing some of the world's key water and health problems. Since global water challenges cross both scientific disciplines, the chemical sciences have the ability to be a key player in improving the lives of billions of people around the world.

Download or read book Sand and Gravel Overlay for Control of Mercury in Sediments written by Leonard H. Bongers and published by . This book was released on 1972 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The release of toxic mercurials by mercury-enriched river sediments was examined in the laboratory. Tests showed a release of 1 micro g of methylmercury per sq m, per day. Methylmercury occurred in sediments with low and with high organic content, in sediments with low and high cation exchange capacity, and in aerobic and anaerobic sediments. The release of toxic mercury could be prevented by a layer of sand, 6 cm in thickness, applied over the mercury-enriched sediments. Layers of fine or coarse gravel (6 cm deep) were as effective as sand. A slow release of metallic mercury occurred in aerobic sediments. The release was much faster in anaerobic sediments. Using ascorbate as an artificial electron donor, metallic mercury could be released at high rates from aerobic sediments as well. Ascorbate appeared to be a useful indicator of divalent and biologically accessible mercury. The laboratory investigations proved the soundness of the sand blanket approach. Costs are given.

Download or read book Mercury Pollution Control in Stream and Lake Sediments written by U. S. Environmental Protection Agency and published by BiblioGov. This book was released on 2013-07 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Environmental Protection Agency (EPA) was introduced on December 2, 1970 by President Richard Nixon. The agency is charged with protecting human health and the environment, by writing and enforcing regulations based on laws passed by Congress. The EPA's struggle to protect health and the environment is seen through each of its official publications. These publications outline new policies, detail problems with enforcing laws, document the need for new legislation, and describe new tactics to use to solve these issues. This collection of publications ranges from historic documents to reports released in the new millennium, and features works like: Bicycle for a Better Environment, Health Effects of Increasing Sulfur Oxides Emissions Draft, and Women and Environmental Health.

Download or read book Control of Mercury Pollution in Sediments written by and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury in Fish Bed Sediment and Water from Streams Across the United States 1998 2005 written by Barbara C. Scudder and published by DIANE Publishing. This book was released on 2010-08 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Control of Mercury Pollution in Sediments written by and published by . This book was released on 1972 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury in Fish Bed Sediment and Water from Streams Across the United States 1998 2005 written by and published by . This book was released on 2009 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mercury Stabilization in Contaminated Sediment by Co blending with Solid phase Reactive Media written by Sara Christine Fellin and published by . This book was released on 2016 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Distribution and Transport of Total Mercury and Methylmercury in Mercury contaminated Sediments in Reservoirs and Wetlands of the Sudbury River East central Massachusetts written by and published by . This book was released on 1999 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remediation Options for Mercury contaminated Sediments Within the Yuba River Watershed written by Tara Fitzgerald and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Historical hydraulic mining activities in the Yuba River watershed have impacted the watershed and the San Francisco Bay. The research evaluates pathways for mercury entry into the watershed and potential remediation technologies to reduce the risk of future mercury contamination from hydraulic mining debris. Remediation technologies for the Yuba Goldfields and Englebright Reservoir are discussed and compared separately. The major pathway for mercury entry into surface water along Yuba Goldfields is within suspended sediment mobilized during flooding conditions. While multiple remediation options are available for the Yuba Goldfields, phytostabilization is the least costly and has the fewest environmental impacts. A non-profit organization is currently working on a restoration project attempting to increase vegetation cover in areas with hydraulic mining debris, creating the potential for synergy in remediation and restoration goals and effort. A phytostabilization pilot study is recommended along the Yuba Goldfields as well as additional characterization of mining debris deposited within the Yuba Goldfields. The major pathway for mercury entry into surface water along Englebright Reservoir is from methylation of mercury in shallow sediments and subsequent movement of methyl mercury into the surface water. Within the Englebright Reservoir, aqueous capping is currently the most promising technology that allows mercury contaminated sediments to remain in place while removing ability for mercury to methylate. An aqueous capping pilot study within Englebright Reservoir and additional characterization of sediments within the reservoir are recommended.