Download or read book Geochemical Modelling of Acid Mine Drainage in Mill Tailings written by Sally Ursula Salmon and published by . This book was released on 2003 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemical Modeling for Mine Site Characterization and Remediation written by D. Kirk Nordstrom and published by Society for Mining, Metallurgy & Exploration. This book was released on 2017-10-01 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The single most important factor for the successful application of a geochemical model is the knowledge and experience of the individual(s) conducting the modeling. Geochemical Modeling for Mine Site Characterization and Remediation is the fourth of six volumes in the Management Technologies for Metal Mining Influenced Water series about technologies for management of metal mine and metallurgical process drainage. This handbook describes the important components of hydrogeochemical modeling for mine environments, primarily those mines where sulfide minerals are present—metal mines and coal mines. It provides general guidelines on the strengths and limitations of geochemical modeling and an overview of its application to the hydrogeochemistry of both unmined mineralized sites and those contaminated from mineral extraction and mineral processing. The handbook includes an overview of the models behind the codes, explains vital geochemical computations, describes several modeling processes, provides a compilation of codes, and gives examples of their application, including both successes and failures. Hydrologic modeling is also included because mining contaminants most often migrate by surface water and groundwater transport, and contaminant concentrations are a function of water residence time as well as pathways. This is an indispensable resource for mine planners and engineers, environmental managers, land managers, consultants, researchers, government regulators, nongovernmental organizations, students, stakeholders, and anyone with an interest in mining influenced water. The other handbooks in the series are Basics of Metal Mining Influenced Water; Mitigation of Metal Mining Influenced Water; Mine Pit Lakes: Characteristics, Predictive Modeling, and Sustainability; Techniques for Predicting Metal Mining Influenced Water; and Sampling and Monitoring for the Mine Life Cycle.

Download or read book Geochemical Modelling of Acid Mine Drainage AMD and Processes Controlling the Fate and Transport of AMD Pollutants in Groundwater Around Kansanshi Mine Site in Solwezi Town Zambia written by Kenny Nyirenda and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Complex geochemical reaction processes that occur within the tailings impoundments control the chemistry of resulting seepage or drainage water. In this dissertation, the second chapter focuses on simulating seepage water chemistry from the main sulphide tailings storage facility (TSF) around Kansanshi mine site in Zambia and its geochemical evolution in the underlying unconfined schist aquifer. The result of this study indicates that seepage water chemistry from the main sulphide TSF is likely to be within near neutral range (6.3 to 6.6) with elevated concentrations of sulphate and low concentration of Fe and Mn. The presence of calcite, dolomite and aluminosilicate minerals in the tailings helps to buffer the pH of the simulated seepage water within near neutral range favorable for the removal of metals from the solution through precipitation. Elevated sulphate levels in simulated seepage water results from the dissolution of both gypsum and pyrite. As the tailings water seeps into the shallow unconfined schist aquifer, geochemical simulations suggests that the presence of pyrite in the aquifer can moderately contribute to elevated concentrations of sulphate along the groundwater flow path with decreasing thickness of the capillary fringe or depth to water due to oxidation promoted by the increased rate of oxygen diffusion. The third chapter investigated the influence of fracture zones on solute (SO42-, Fe and Mn) transport from the main TSF using Equivalent Porous Media (EPM) approach, focusing on sulphate since it is the least reactive and can migrate far from the source. Two solute transport models were developed; one involving an EPM-only representation of the mapped fracture zones, and one including hypothetical fractures as high hydraulic conductivity zones to explore how unmapped fractures could impact solute transport. Results of the simulations revealed that only the model which incorporated hypothetical fractures to intersect wells that consistently show elevated sulphate concentrations show some degree of a match between the simulated and observed sulphate concentrations especially with boreholes KE03 and KE04 situated downstream of the main TSF, with the sulphate plume (>100mg/L) elongated along all fracture zones cutting across the dam. This demonstrates that fractures have a greater effect on solute transport than unfractured representation of the porous matrix, suggesting a simple EPM-based conceptual model may not be able to realistically represent transport behaviors in this system. However, in both cases, results from both solute transport models show that both Fe and Mn are restricted to the main TSF footprint and thus are not likely to be of concern from the facility.

Download or read book Acid Mine Drainage at Ore Knob Tailings Pile written by Seyedeh Mehrnoosh Behrooz and published by . This book was released on 2012 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Applications of Geochemical Modeling written by Chen Zhu and published by Cambridge University Press. This book was released on 2002-05-13 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: An application of geochemical modeling to environmental problems, illustrated with case studies of real-world environmental investigations.

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 Critical Review of Geochemical Processes and Geochemical Models Adaptable for Prediction of Acidic Drainage from Waste Rock written by and published by . This book was released on 1995 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Generation of Acid Mine Drainage Reactive Transport Models Incorporating Geochemical and Microbial Kinetics written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Generation of acid mine drainage: Reactive transport models incorporating geochemical and microbial kinetics.

Download or read book Modelling Geochemical Interactions with Groundwater Transport Processes written by Hongze Gao 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 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 Geochemical Investigation and Computer Modelling of Acid Mine Drainage Sullivan Mine Denniston Plateau West Coast written by Andrew De Joux and published by . This book was released on 2003 with total page 524 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Geochemical Characterization and Modelling of Acid Mine Drainage in Some Gauteng Formation written by Mongezi Gxamza and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Geochemistry of Minesite Drainage written by Kevin Andrew Morin and published by . This book was released on 1997 with total page 362 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 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 U S Geological Survey Open file Report written by and published by . This book was released on 1994 with total page 116 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 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.