CiteSeerX Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Acid mine drainage (AMD) is usually treated by air oxidation followed by addition of lime to precipitate metal hydroxides and calcium sulfate. Geo2 Limited of Melbourne, Australia, has developed and patented a novel alternative precipitation scheme based on the formation of mixed valency, M(II)M(III), hydroxide
A well known organisation in South Africa, the Federation for a Sustainable Environment, spearheaded by Ms Mariette Liefferink has been fighting the issue of the effects of mining and Acid Mine Drainage with government and mining companies for 2 decades. Sources of acid mine drainage can remain active for decades or centuries after a mine closes.
The main problem with sulfide mining is the contamination of water resources caused by acid mine drainage (AMD) processes. AMD occurs when sulfurous minerals are exposed to atmospheric [1
2017 West ia Mine Drainage Task Force Symposium Papers Waterfront Place Hotel, Morgantown, West ia April 9 13, 2017 Monday, April 10, 2017 Monday Morning Plenary Sessions History of the WV Mine Drainage Task Force Jeff Skousen, Member of Task Force The American Society for Mining and Reclamation Pete Stahl, President of ASMR Appalachian Regional
Mine drainage is formed when pyrite (an iron sulfide) is exposed and reacts with air and water to form sulfuric acid and dissolved iron. Some or all of this iron can precipitate to form the red, orange, or yellow sediments in the bottom of streams containing mine drainage. The acid runoff further dissolves heavy metals such as copper, lead, and mercury into groundwater or
Acid mine drainage, acid and metalliferous drainage (AMD), or acid rock drainage (ARD) is the outflow of acidic water from metal mines or coal mines. Acid rock drainage occurs naturally within some environments as part of the rock weathering process but is exacerbated by largescale earth disturbances characteristic of mining and other large
Charles "Chuck" Cravotta is a research hydrologist whose projects focus on geochemical and hydrological processes that control water quality, particularly the sources, transport, and attenuation of metals and nutrients in watersheds and aquifers affected by mining. Results apply to scientific and regulatory programs for the prevention and remediation of aquatic contamination.
19661969 Assistant Professor of Geology, Department of Geology, Michigan State University 1981, October 57 Presented Paper on solution chemistry of gold and silver and impliions for epithermal ore formation Brake, S.S., K.A. Connors, and S.B. Romberger, 2001, A river runs through it: impact of acid mine drainage on the
Treatment of acid mine drainage 25 BACKGROUND OF PASSIVE TREATMENT Acid drainage remediation by passive systems was first documented in the early 1980''s during studies conducted by Hunstman et al. and Wieder and Lang natural Sphagnum mosses wetlands that received acid mine drainage resulted in the amelioration of water quality [9, 10].
Pyrite (FeS 2) is the most abundant sulfide mineral on Earth and represents a significant reservoir of reduced iron and sulfur both today and in the geologic past.In modern environments, oxidative transformations of pyrite and other metal sulfides play a key role in terrestrial element partitioning with broad impacts to contaminant mobility and the formation of acid mine drainage systems.
The coprecipitation of heavy metals from these two acid mine waters is studied as a function of Fe/M molar ratio, oxidation time and settling rate under applied magnetic field. The investigation indies that the modified ferrite coprecipitation can remove substantially all of the dissolved metal ions from acid mine drainage.
(60). Acid mine drainage has not been reported in southeastern Montana but does exist elsewhere in the state (37). Another group of bacteria important in sulfur transformations, the sulfate reducers, has been suggested by Tuttle, et al., and King, et al., as a means of combatting acid mine drainage due to the ability
Acid mine drainage (AMD) is a global problem that may have serious human health and environmental impliions. Laboratory and field tests are commonly used for predicting AMD, however, this is challenging since its formation varies from sitetosite for a number of reasons.
Sulfide Mining Overview By CHRISTINE PAULU College of Forestry and Conservation, University of Montana EMILY BABCOCK William Mitchell College of Law, Minnesota substantial environmental impacts. 1 For example, in 1994 the EPA has determined that Acid Mine Drainage (AMD) from metal mining operations is the "largest problem facing the
Acid rock drainage formation and treatment: a review. Nosa O. Egiebor. production of highly acidic, metal‐laden leachates, which are generally referred to as acid rock drainage (ARD) or acid mine drainage (AMD). This ARD production, which can be sustained for hundreds of years, has become the single biggest environmental problem facing
This is mainly due to the fact that most stakeholders, without direct benefit from the mining activity, perceive mining as a threat for their health and the environment, as for example by the formation of acid mine drainage (AMD) or more general acid rock drainage (ARD) and subsequent water pollution . As metal extraction technologies have
Abstract. Acid mine drainage (AMD) is a global problem that may have serious human health and environmental impliions. Laboratory and field tests are commonly used for predicting AMD, however, this is challenging since its formation varies from sitetosite for a number of reasons.
Extremely acidic mine waters with pH values as low as −3.6, total dissolved metal concentrations as high as 200 g/L, and sulfate concentrations as high as 760 g/L, have been encountered underground in the Richmond Mine at Iron Mountain, CA. These are the most acidic waters known. The pH measurements were obtained by using the Pitzer method to define pH for calibration of glass
This is a GradSchoolShopper.com profile of Geosciences and Engineering, Montana Technological University. GradSchoolShopper.com (GSS) is the only online graduate school guide exclusively dedied to physics and related fields.
Recent M.S. Theses and Ph.D. Dissertations Department of Geology Thesis and dissertation titles from 19671994 are available upon request from the Department of Geology. Please see our Alumni News page for news and updates on the careers and activities of our alumni.
Theses and Dissertations Supervised: Bailey, A., 1967, Course and extent of alteration of selected ferromagnesian silies by aqueous solutions of oxalic acid. (Masters) Michigan State University. Wood, W.W., 1969, Geochemistry of ground water of the Saginaw Formation in the upper Grand River Basin, Michigan. (Ph.D.) Michigan State University.
University of Colorado at Boulder. RobinsonLora, M. A., and R. A. Brennan. 2009. Efficient Metal Removal and Neutralization of Acid Mine Drainage by CrabShell Chitin under Batch and ContinuousFlow Conditions. University Park, PA: The Pennsylvania State University Department of Civil and Environmental Engineering.
Water flowing through active or abandoned mine sites can become polluted by the material being mined. By far the most common mine drainage problem is that of acid mine drainage (AMD). Sulfuric acid is produced when water interacts with sulfurbearing materials in the presence of oxygen and common bacteria.
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