Download or read book A Geochemical Modeling Study of the Effects of Urea degrading Bacteria on Groundwater Contaminated with Acid Mine Drainage written by Tracy L. Fleury and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aqueous geochemical computer modeling was carried out for an aquifer contaminated with acid mine drainage at the South Bay mine site to test the feasibility of a proposed bioremediation treatment plan. The treatment consists of adding urea to the aquifer to stimulate growth of indigenous urea-degrading bacteria that produce carbonate and ammonium. These products have the potential for neutralizing the groundwater and precipitating iron oxides, which may remove heavy metals from solution through sorption processes. With aqueous geochemical data for piezometers situated along a hydraulic gradient from the tailings area to the aquifer's discharge zone, a model of the aquifer's geochemistry was constructed with the program MINEQL +. Once the model was calibrated to ensure that calculated pH values matched measured field pH values, titrations with the urea-degradation products were undertaken to simulate introduction of the urea-degradation products into the groundwater over time. The amount of carbonate and ammonium required to raise the pH in the piezometers to 8.0-8.1 ranged from 3.5 * 10 -5 M - 0.24 M and 7.0 * 10-5 M - 0.48 M, respectively. As is evident with observed pH increases and oxide supersaturation as a result of the titrations, the metabolic products of microbial urea degradation have been proven to have considerable potential for treating contaminated groundwater at South Bay.

Download or read book A Geochemical Modeling Study of the Effects of Urea degrading Bacteria on Groundwater Contaminated with Acid Mine Drainage microform written by Tracy L. (Tracy Lynne) Fleury and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Geochemical Modeling Study of the Effects of Urea degrading Bacteria on Groundwater Contaminated with Acid Mine Drainage written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Water Quality and Geochemical Modeling of Water at an Abandoned Coal Mine Reclaimed with Coal Combustion By products written by Ralph J. Haefner and published by . This book was released on 2002 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acid Mine Drainage Rock Drainage and Acid Sulfate Soils written by James A. Jacobs and published by John Wiley & Sons. This book was released on 2014-04-28 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides the tools needed to analyze and solve acid drainage problems Featuring contributions from leading experts in science and engineering, this book explores the complex biogeochemistry of acid mine drainage, rock drainage, and acid sulfate soils. It describes how to predict, prevent, and remediate the environmental impact of acid drainage and the oxidation of sulfides, offering the latest sampling and analytical methods. Moreover, readers will discover new approaches for recovering valuable resources from acid mine drainage, including bioleaching. Acid Mine Drainage, Rock Drainage, and Acid Sulfate Soils reviews the most current findings in the field, offering new insights into the underlying causes as well as new tools to minimize the harm of acid drainage: Part I: Causes of Acid Mine Drainage, Rock Drainage and Sulfate Soils focuses on the biogeochemistry of acid drainage in different environments. Part II: Assessment of Acid Mine Drainage, Rock Drainage and Sulfate Soils covers stream characterization, aquatic and biological sampling, evaluation of aquatic resources, and some unusual aspects of sulfide oxidation. Part III: Prediction and Prevention of Acid Drainage discusses acid-base accounting, kinetic testing, block modeling, petrology, and mineralogy studies. It also explains relevant policy and regulations. Part IV: Remediation of Acid Drainage, Rock Drainage and Sulfate Soils examines both passive and active cleanup methods to remediate acid drainage. Case studies from a variety of geologic settings highlight various approaches to analyzing and solving acid drainage problems. Replete with helpful appendices and an extensive list of web resources, Acid Mine Drainage, Rock Drainage, and Acid Sulfate Soils is recommended for mining engineers and scientists, regulatory officials, environmental scientists, land developers, and students.

Download or read book Acid Mine Water written by Water Resources Scientific Information Center and published by . This book was released on 1975 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Hydrogeologic and Geochemical Evolution of Contaminated Groundwater Near Abandoned Mines written by Laura Toran and published by . This book was released on 1985 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Acid Mine Drainage Formation and Abatement written by Ohio State University. Research Foundation and published by . This book was released on 1971 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Ground Water in Mine Drainage Problems written by Ivan Barnes and published by . This book was released on 1964 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Microbial Factor in Acid Mine Drainage Formation written by Robert Andrew Baker and published by . This book was released on 1970 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physical and Chemical Parameters Determining Bacterial Growth of Acid Mine Drainage Sites in Southeast Ohio written by Sebastian Dominic Barkett and published by . This book was released on 2020 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study focused on highlighting the connection between the physical, chemical, sedimentary, and microbial aspects of various acid mine drainage settings of contrasting chemistry. In addition, a comprehensive thesis model was suggested to explain the interconnected relationships of this data set. The first 30 meters were evaluated for Pine Run (Fe), Esco No. 40 (Fe and Al), York Clay No. 4 (Mn), and Sines No. 2 (Al) coal mines. The acidophilic microbial taxa evaluated were Thiothrix sp.(any), Gallionella ferruginea, and Leptothrix discophora. Through principal component analysis (PCA) and a Spearman correlation matrix (n=20) a number of correlations were found to describe our model. The results of this study indicate a strong relationship between distribution of total Fe, and SO4, in the sediment due to physics of flow. Statistical analyses suggest precipitation of Mn into the sediments could occur at the medium-coarse sand (0.5-0.99 mm) grain size fraction and Fe likely precipitates as a larger grain size fraction than this. Both Thiothrix and G. ferruginea taxa shared a positive correlation with velocity, and L. discophora shared a negative correlation to flow velocity. Variable flow conditions within the first 30-meters of the mine opening can alter distribution of precipitates to deposit medium to coarse sand grain size fractions, reoxygenate waters, and alter pH to create supersaturated conditions for the minerals 4 basaluminite, amorphous Fe(OH)3, gibbsite, barite, and goethite. Results from this study also indicate G. ferruginea is likely favored in Fe contaminated systems, L. discophora could be the more abundant in Mn and Al contaminated mines, and SO4 contaminated drainage favors Thiothrix. Geochemical modeling results agree with water quality tests and field observations for each site

Download or read book Microbiological Treatment of Acid Mine Drainage Waters written by Continental Oil Company. Research and Development Department and published by . This book was released on 1971 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Modelling Reactive Transport of Acid Mine Drainage in Groundwater written by Tegenne Tekelu Geberetsadike and published by . This book was released on 2004 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research on Acidic Metal Contaminants in Pinal Creek Basin Near Globe Arizona written by James Gary Brown and published by . This book was released on 1997 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Geochemistry of Groundwater and Soils Contaminated by Acid Mine Leachate written by Roger B. Herbert and published by . This book was released on 1995 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemistry of Batch extract Waters Derived from Spoil Material Collected at the Cordero Coal Mine Powder River Basin Wyoming written by David L. Naftz and published by . This book was released on 1990 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Objective Index for the Assessment of the Contamination of Surface and Ground Waters by Acid Mine Drainage written by N. F. Gray and published by . This book was released on 1995 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: