Download or read book Geochemistry and Environmental Mineralogy of the Iron sulphur arsenic System written by Mariëtte Wolthers and published by . This book was released on 2003 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arsenic written by Robert Bowell and published by Walter de Gruyter GmbH & Co KG. This book was released on 2014-11-21 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental Mineralogy and Bio-Geochemistry of Arsenic provides a comprehensive understanding of arsenic geochemistry in the near-surface environment. Topics covered include the mineralogy, thermodynamics, geochemistry, analysis, microbiology, and bioavailability of arsenic, with emphasis on implications for arsenic toxicity, geochemistry in natural ground waters, and mine-associated impacts and possible mitigation options. This volume is useful for those seeking to understand arsenic geochemistry and biological interactions in the near-surface environment, Clay Minerals does not use an online manuscript tracking/submission system. as well those working for mining companies, the chemicals industry, NGO’s or government bodies concerned with reducing the impact of arsenic on the environment.
Download or read book Arsenic in Ground Water written by Alan H. Welch and published by Springer Science & Business Media. This book was released on 2007-05-08 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Interest in arsenic in ground water has greatly increased in the past decade because of the increased awareness of human health effects and the costs of avoidance or treatment of ground water supplies used for consumption. The goal of this book is to provide a description of the basic processes that affect arsenic occurrence and transport by providing sufficient background information on arsenic geochemistry and descriptions of hi- arsenic ground water, both affected and unaffected by human activity. An understanding of thermodynamics, adsorption, and the speciation of arsenic in solid phases, which are described in first three chapters, is needed to predict the fate of arsenic in ground water systems. Large-scale and deep movement of ground water can and has redistributed arsenic in the near surface environment, as described in the next two chapters. These large-scale systems can affect large volumes of both ground water and surface water, such as in the Yellowstone system, and can produce mineralised zones that subsequently release arsenic to ground water supplies. Regional identification of high-arsenic ground water and its consumption as described in the next three chapters clearly demonstrates a need for increased wat- quality monitoring, particularly in south and southeast Asia. Chapters 9-11 provide examples of high arsenic ground water associated with sulfide mineral oxidation and alkaline conditions. Finally, smaller scale studies of the effects of human activities that have produced high-arsenic ground water and methods for attenuation of ground water are presented.
Download or read book Arsenic written by Juraj Majzlan and published by Walter de Gruyter. This book was released on 2014 with total page 635 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume ... presents a comprehensive review of the topics covered at the "Environmental Geochemistry, Mineralogy, and Microbiology of Arsenic" short course that followed the 24th Annual V.M. Goldschmidt Conference and held at the Miners Foundry, Nevada City, CA (June 15-16, 2014)"--Page iii.
Download or read book Pore Scale Geochemical Processes written by Steefel and published by . This book was released on 2015-09-16 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This volume ... presents a comprehensive review of the topics covered at the "Environmental Geochemistry, Mineralogy, and Microbiology of Arsenic" short course that followed the 24th Annual V.M. Goldschmidt Conference and held at the Miners Foundry, Nevada City, CA (June 15-16, 2014)"--Page iii.
Download or read book The Environmental Geochemistry of Sulfide Mine wastes written by David W. Blowes and published by . This book was released on 1994 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulfur Biogeochemistry written by Jan P. Amend and published by Geological Society of America. This book was released on 2004 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Geochemistry of Sulfide Oxidation written by Charles N. Alpers and published by Wiley-VCH. This book was released on 1994-02-15 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: From a symposium at the 204th National Meeting of the American Chemical Society, Washington, D.C., August 1992. The research in this area is motivated by the locally severe environmental impacts and toxicity associated with the products of sulfide oxidation. Thirty- nine multidisciplinary papers address various aspects of sulfide oxidation: laboratory studies of kinetics; numerical modeling in tailings, waste rock, and in situ deposits; solubility and sorption control in formation of sulfide-oxidation products; transport products in surface waters, and in sediments; effects on ground-water geochemistry; processes in wetlands and the oceans; analytical methods; and remediation and prevention of environmental effects. Annotation copyright by Book News, Inc., Portland, OR
Download or read book Relation of Arsenic Iron and Manganese in Ground Water to Aquifer Type Bedrock Lithogeochemistry and Land Use in the New England Coastal Basins written by and published by . This book was released on 1999 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Environmental Geochemistry written by B. Sherwood Lollar and published by Elsevier. This book was released on 2005-05-21 with total page 652 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Treatise on Geochemistry is the first work providing a comprehensive, integrated summary of the present state of geochemistry. It deals with all the major subjects in the field, ranging from the chemistry of the solar system to environmental geochemistry. The Treatise on Geochemistry has drawn on the expertise of outstanding scientists throughout the world, creating the reference work in geochemistry for the next decade. Each volume consists of fifteen to twenty-five chapters written by recognized authorities in their fields, and chosen by the Volume Editors in consultation with the Executive Editors. Particular emphasis has been placed on integrating the subject matter of the individual chapters and volumes. Elsevier also offers the Treatise on Geochemistry in electronic format via the online platform ScienceDirect, the most comprehensive database of academic research on the Internet today, enhanced by a suite of sophisticated linking, searching and retrieval tools.
Download or read book Geochemistry of Naturally Occurring Arsenic in the Humboldt River Basin Nevada written by Shahnewaz Mohammad and published by . This book was released on 2013 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: The geochemistry of naturally occurring arsenic (As) has been investigated in the surface waters and ground waters of the shallow alluvial aquifers of the Humboldt River Basin (HRB) in northern Nevada using laboratory experiments, geochemical reaction path modeling, and statistical analysis methods. A total of 15 surface water samples and 19 sediment samples were obtained from the Humboldt River and river-bottom sediments in the field in September, 2007. The ground water data from 72 wells, selected from a total of 47,500 samples from 18,800 springs and wells, in the HRB and northern Nevada were obtained from a public domain database provided by the Nevada Bureau of Mines and Geology. Concentrations of dissolved As in the waters of the Humboldt River (HR) range from 0.012 to 0.066 mg/L, with an average of 0.032 mg/L. The concentrations of As in shallow alluvial ground waters range up to 0.55 mg/L with an average of 0.06 mg/L. The current Environmental Protection Agency (EPA) maximum contaminant level (MCL) of As is 0.01 mg/L. The study of the distribution, sources, and processes controlling As in the Quaternary alluvial aquifers of the HRB and northern Nevada has found that the distribution of high As concentrations can be correlated with local and regional geology and geomorphology. The highest concentrations of As in the ground waters occur in the mineralized zones of metallic-sulfides around Boulder Valley, followed by the Quaternary playa deposits around Lovelock Valley and the Humboldt Sink, where evaporation predominates. Bi-variate correlations and factor analyses of the dissolved components in the ground water suggest that the sources of dissolved As are likely from dissolution of As-bearing sulfides, iron-oxyhydroxides, weathering of ferromagnesian silicates, and mixing with geothermal waters, where oxidation of As-bearing sulfides is a local source of As in the Boulder valley area. The statistical and geochemical analyses of the HR bed sediments suggest that oxidation of As-bearing sulfide minerals is the source for high dissolved As in the upstream area. Concentrations of dissolved As and other trace elements are affected by mixing with ground water inflows occurring as river base flows in the upper HR and middle HR areas. Mixing with high-As geothermal waters locally enriches As near known areas of geothermal hot springs. Evaporation further enriches As in lower reaches of the river. Sequential extraction analyses of the river sediments demonstrate that As is mostly (83%) bound to the residual fraction which contains silicate minerals, and a lesser amount of As (13%) is held by iron-oxyhydroxides. The results of geochemical reaction path modeling indicate that oxidation of As-bearing sulfide minerals plays the most important role for source of As and sulfate in the upstream region with approximately 3.75 mmoles (449 ppm) of pyrite and 6.88 x10−4 mmoles (0.11 ppm) of arsenopyrite oxidized per liter of river water. The acidity produced by the oxidation of sulfide minerals is buffered by carbonate equilibria as a result of dissolution of Pre-Cenozoic carbonate rocks in the country rocks of the upstream region. Modeling results demonstrate that the source of As from oxidation of sulfide minerals is less significant in the downstream, where mixing with shallow ground water inflows and local geothermal spring water control the enrichment of dissolved As. The effects of evapo-transpiration further control the dissolved As concentrations in the lower HR waters. The process of sorption-desorption, which is pH-dependent, is less significant in the HR unlike many other similar semi-arid environments, and needs further evaluation.
Download or read book Sulfide Mineralogy and Geochemistry written by David J. Vaughan and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 61 of Reviews in Mineralogy and Geochemistry presents an up-to-date review of sulfide mineralogy and geochemistry. The crystal structures, electrical and magnetic properties, spectroscopic studies, chemical bonding, thermochemistry, phase relations, solution chemistry, surface structure and chemistry, hydrothermal precipitation processes, sulfur isotope geochemistry and geobiology of metal sulfides are reviewed. Where it is appropriate for comparison, there is brief discussion of the selenide or telluride analogs of the metal sulfides. When discussing crystal structures and structural relationships, the sulfosalt minerals as well as the sulfides are considered in some detail.
Download or read book Evolution of Early Earth s Atmosphere Hydrosphere and Biosphere written by Stephen E. Kesler and published by Geological Society of America. This book was released on 2006-01-01 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The history of Earth's early atmosphere, hydrosphere, and biosphere, from Hadean through Proterozoic time, is one of geology's enduring puzzles. Ore deposits provide important insights into this history because they contain elements and minerals that are highly sensitive to the geochemical environment in which they form. Just what these minerals tell us remains a matter of considerable debate, however. When and how did life develop, an oxygen-rich atmosphere form, and sulfate dominate the ocean? This volume contains reports on these questions from both sides of the aisle for iron and manganese formations, uranium paleoplacers and hydrothermal deposits, and exhalative sulfides and oxides."--Publisher's website.
Download or read book Special Papers written by and published by . This book was released on 1934 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Arsenic Research written by Peggy A. O'Day and published by . This book was released on 2005 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: The realization during the last decade that many water supplies worldwide are affected by arsenic at concentrations above acceptable health levels has motivated research directed at understanding the occurrence, distribution, and mobilization of arsenic in the environment, and stimulated the development of new, cost-effective treatment technologies. Arsenic accumulation and migration is closely tied to its chemical speciation, which is often controlled by a complex combination of abiotic and biotic processes coupled with physical transport. This symposium volume focuses on bridging the gap between different approaches and scales of investigation and on fostering a more unified understanding of arsenic occurrence and behavior, including geological, geochemical, hydrological, microbiological, ecological, and engineering aspects of arsenic-related research. Papers in this volume highlight a variety of new research directed at understanding the sources, distribution, and mobilization of arsenic in the environment. It includes recent efforts in the development of cost-effective treatment technologies and in approaches to natural attenuation and accelerated remediation methods. These topics are thematically organized into three sections in the volume, the first focusing on laboratory studies and theoretical modeling, the second on arsenic behavior and cycling in a range of field settings, and the third on studies associated with treatment and remediation technologies and methods. This book is targeted at scientists and engineers (chemists, geochemists, geologists, hydrogeologists, microbiologists, molecular biologists, chemical engineers, environmental engineers) as well as graduate students who are engaged in research on arsenic in both natural and engineered aqueous systems, and on the development of methods for arsenic treatment and removal.
Download or read book Sulfidic Sediments and Sedimentary Rocks written by David Rickard and published by Newnes. This book was released on 2012-12-31 with total page 813 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals with sedimentary sulfides which are the most abundant authigenic minerals in sediments. Special emphasis is given to the biogeochemistry that plays such a central role in the formation of sedimentary sulfides. It will be of interest to scientists in a number of disciplines, including geology, microbiology, chemistry and environmental science. The sulfur system is important to environmental scientists considering the present and future effects of pollution and anoxia. The development of the sulfur system – particularly the characteristics of ocean anoxia over the last 200 Ma – is useful in predicting the future fate of the Earth surface system as well as in understanding the past. The biochemistry and microbiology of the sulfur system are key to understanding microbial ecology and the evolution of life. - First monograph on sedimentary sulfides, covering the ancient and modern sedimentary sulfide systems - Comprehensive, integrating chemistry, microbiology, geology and environmental science - All key references are included and discussed
