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in subjects: "Acid Mine Drainage"  
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Coal conversion siting on coal mined lands: water quality issues

Description: The siting of new technology coal conversion facilities on land disturbed by coal mining results in both environmental benefits and unique water quality issues. Proximity to mining reduces transportation requirements and restores disrupted land to productive use. Uncertainties may exist, however, in both understanding the existing site environment and assessing the impact of the new technology. Oak Ridge National Laboratory is currently assessing the water-related impacts of proposed coal conve… more
Date: January 1, 1980
Creator: Triegel, E.K.
Partner: UNT Libraries Government Documents Department
open access

Distribution of selected transition and heavy metals in clastic overburden units of the Appalachian and Interior Coal Basins: water quality implications

Description: As part of a study to investigate possible sources of transition and heavy metals transported in coal mine drainage, overburden lithologies from 18 surface mines in the Appalachian and Interior Basins were sampled and analyzed for total chemistry. The mines were widely scattered geographically so that samples could be obtained of as many representative lithologies as possible. Overburden units were predominantly Pennsylvanian basin margin clastics, with some Pennsylvanian carbonates and Pleisto… more
Date: January 1, 1979
Creator: Bogner, J. E. & Sobek, A. A.
Partner: UNT Libraries Government Documents Department
open access

Environmental control technology for contaminated drainage from coal and coal wastes

Description: The aqueous drainage from coal piles and coal refuse dumps frequently is contaminated with acids and a variety of trace elements and inorganic constituents. The Los Alamos Scientific Laboratory is conducting research, jointly supported by DOE/ECT and EPA, to assess the nature and magnitude of trace elements in the drainage from coals and coal preparation wastes, to identify the trace elements of environmental concern in these effluents, and to define necessary environmental control technology f… more
Date: January 1, 1978
Creator: Wewerka, E. M.; Bertino, J. P.; Wagner, P.; Williams, J. M.; Wanek, P. L. & Wangen, L. E.
Partner: UNT Libraries Government Documents Department
open access

Environmental pollution by trace elements in coal preparation wastes. [7 refs]

Description: Coal preparation waste contains a multitude of leachable elements. Data for 18 elements are presented here. Generally these elements occur in the waste leachates at levels related to their occurrence in the water. Closer inspection reveals, however, that some elements are much more leachable than others. Thus, for Illinois-Basin waste iron is found to be present in waste leachate in high amounts, but this amount represents only a small percentage of the total iron in the waste. Cobalt and nicke… more
Date: January 1, 1977
Creator: Williams, J. M.; Wewerka, E. M.; Vanderborgh, N. E.; Wagner, P.; Wanek, P. L. & Olsen, J. D.
Partner: UNT Libraries Government Documents Department
open access

The USDOE Office of Fossil Energy Waste Management Program: An overview

Description: The Department of Energy Office of Fossil Energy Waste Management Program is a small but active program with a focus on management issues for the solid residues produced by advanced coal technologies. The three major project areas are characterization of by-products, disposal management issues, and utilization of by-products. The utilization area can be subdivided into projects looking at land management utilization technologies, management of byproducts in underground mines to address environm… more
Date: June 1, 1994
Creator: Harness, J. L.
Partner: UNT Libraries Government Documents Department
open access

Natural nanoparticle structure, properties and reactivity from X-ray studies

Description: Synthetic analogs of naturally occurring nanoparticles have been studied by a range of X-ray techniques to determine their structure and chemistry, and relate these to their novel chemical properties and physical behavior. ZnS nanoparticles, formed in large concentrations naturally bymicrobial action, have an interesting core-shell structure with a highly distorted and strained outer layer. The strain propagates through the particles and produces unusual stiffness but can be relieved by changin… more
Date: October 1, 2009
Creator: Waychunas, Glenn A.
Partner: UNT Libraries Government Documents Department
open access

Reanalysis of the Schwertmannite structure and the incorporationof SO42- groups: An IR, XAS, WAXS and simulation study

Description: Schwertmannite is a poorly crystallized iron oxyhydroxidewith essential structural sulfate that can be a major component in acidmine drainage environments. Original characterization work concluded thatthe sulfate was largely contained within tunnels of an orderedakaganeite-like structure based on powder XRD, analysis of IR spectra,and sulfate extraction procedures [1]. Since the original description,problems have emerged with the nature of the tunnel sulfate, and with theinterpretation of the I… more
Date: May 5, 2001
Creator: Waychunas, G.A.; Myneni, S.C.B.; Traina, S.J.; Bigham, J.M.; Fuller, C.C. & Davis, J.A.
Partner: UNT Libraries Government Documents Department
open access

TREATMENT OF ACID MINE DRAINAGE USING FISHBONE APATITE IITM

Description: ABSTRACT. In 2000, a reactive barrier was installed on the East Fork of Ninemile Creek near Wallace, Idaho to treat acid mine discharge. The barrier was filled with fishbone derived Apatite IITM to remove the contaminants of concern (Zn, Pb, and Cd) and raise the pH of the acidic mine discharge. Metal removal has been achieved by a combination of chemical, biological, and physical precipitation. Flow for the water ranges from 5 to 35 gallons per minute. The water is successfully being treated, … more
Date: October 1, 2006
Creator: Yancey, Neal A.
Partner: UNT Libraries Government Documents Department
open access

TOUGHREACT: a new code of the TOUGH Family for Non-Isothermal multiphase reactive geochemical transport in variably saturated geologic media

Description: Coupled modeling of subsurface multiphase fluid and heat flow, solute transport and chemical reactions can be used for the assessment of acid mine drainage remediation, waste disposal sites, hydrothermal convection, contaminant transport, and groundwater quality. We have developed a comprehensive numerical simulator, TOUGHREACT, which considers non-isothermal multi-component chemical transport in both liquid and gas phases. A wide range of subsurface thermo-physical-chemical processes is consid… more
Date: March 11, 2003
Creator: Xu, Tianfu; Sonnenthal, Eric; Spycher, Nicolas & Pruess, Karsten
Partner: UNT Libraries Government Documents Department
open access

New Direction in Hydrogeochemical Transport Modeling: Incorporating Multiple Kinetic and Equilibrium Reaction Pathways

Description: At least two distinct kinds of hydrogeochemical models have evolved historically for use in analyzing contaminant transport, but each has important limitations. One kind, focusing on organic contaminants, treats biodegradation reactions as parts of relatively simple kinetic reaction networks with no or limited coupling to aqueous and surface complexation and mineral dissolution/precipitation reactions. A second kind, evolving out of the speciation and reaction path codes, is capable of handling… more
Date: February 2, 2000
Creator: Steefel, C.I.
Partner: UNT Libraries Government Documents Department
open access

Water quality implications of increase coal use

Description: This paper considers the potential water quality impacts of future energy scenarios which project an approximate doubling of coal utilization from 1975 to 1985. The major impacts estimated for coal extraction are related to effluents from unregulated activities (reclaimed areas prior to stable revegetation) and pollutants (e.g., metals and ammonia). Where applicable, the EPA effluent guidelines to be in effect by 1983 reduce the impact of individual sources to low levels. For example, total sus… more
Date: January 1, 1978
Creator: Habegger, L. J.; Chiu, S. Y.; Dauzvardis, P. A. & Gasper, J. R.
Partner: UNT Libraries Government Documents Department
open access

Assessment of water quality impacts of a western coal mine. [10 refs]

Description: This report describes interim results of a water quality investigation carried out during 1975 and 1976 in the vicinity of the Big Horn Mine, an operating surface coal mine in the northwestern part of the Powder River Basin, Wyoming. The mine has been operated for approximately 20 years and is one of the several operating or proposed mines in the basin. Present coal production is about 1,000,000 tons (approximately 910,000 MT) per year. The effect of the Big Horn Mine on concentrations of disso… more
Date: January 1, 1977
Creator: Dettmann, E. H. & Olsen, R. D.
Partner: UNT Libraries Government Documents Department
open access

TOURGHREACT: A Simulation Program for Non-isothermal MultiphaseReactive Geochemical Transport in Variably Saturated GeologicMedia

Description: TOUGHREACT is a numerical simulation program for chemically reactive non-isothermal flows of multiphase fluids in porous and fractured media. The program was written in Fortran 77 and developed by introducing reactive geochemistry into the multiphase fluid and heat flow simulator TOUGH2. A variety of subsurface thermo-physical-chemical processes are considered under a wide range of conditions of pressure, temperature, water saturation, ionic strength, and pH and Eh. Interactions between mineral… more
Date: December 7, 2004
Creator: Xu, Tianfu; Sonnenthal, Eric; Spycher, Nicolas & Pruess, Karsten
Partner: UNT Libraries Government Documents Department
open access

A process model of natural attenuation in drainage from a historic mining district

Description: A process model was used to better understand the controls on the chemical evolution of drainage in a historic mining district. At the Pecos Mine Operable Unit, New Mexico, drainage near the waste rock pile is acidic (pH varies from 3.0--5.0) and carries high concentrations of Zn, Al, Cu and Pb. As drainage flows toward the Pecos River, pH increases to greater than 7 and heavy metal content decreases. A process model of natural attenuation in this drainage shows the main controls on pH are reac… more
Date: June 5, 2000
Creator: BERGER,AMY C.; BETHKE,CRAIG M. & KRUMHANSL,JAMES L.
Partner: UNT Libraries Government Documents Department
open access

Disposal of fluidized-bed combustion ash in an underground mine to control acid mine drainage and subsidence

Description: This project will evaluate the technical, economic, and environmental feasibility of filling abandoned underground mine voids with alkaline, advanced coal combustion wastes (fluidized-bed combustion (FBC) ash). Both pneumatic and hydraulic injection methods will be investigated. Success will be measured in terms of technical feasibility of the approach (i.e., percent void filling), cost, environmental benefits (acid mine drainage and subsidence control) and environmental impacts (noxious ion re… more
Date: November 1, 1995
Creator: Ziemkiewicz, P.F.; Black, C.D. & Head, W.J.
Partner: UNT Libraries Government Documents Department
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