acid mines Articles

  • Acid mine drainage treatment

    Acid mine/rock drainage is a rampant problem in the world today. The above photo depicts acid drainage at an abandoned mine in the Yukon Territory of northwest Canada. This mine shares a similar history to thousands of other mines throughout the world. It was in operation for six short years in the 1950’s, producing gold ore. Its profitability eventually failed and it was abandoned. In the ...


    By WesTech Engineering, Inc.

  • Membrane technology applied to acid mine drainage from copper mining

    The objective of this study is to evaluate the treatment of high-strength acid mine drainage (AMD) from copper mining by nanofiltration (NF) and reverse osmosis (RO) at pilot scale. The performances of two commercial spiral-wound membranes – NF99 and RO98pHt, both from Alfa Laval – were compared. The effects of pressure and feed flow on ion rejection and permeate flux were evaluated. The ...


    By IWA Publishing

  • Mine Water

    THis article shows the use of the Cogent PDV6000plus as a portable analyser used to monitor metal concentration in river and lake water which is polluted by acid mine water from abandoned mine ...

  • Sustainable mining

    It's imperative that natural resource industries adopt a proactive (even aggressive) approach to the disposal and management of their wastes. Operators must challenge themselves to raise the bar in terms of environmental performance not only to meet the expectations of regulators today (and investors and the general public), but in the future, when requirements will no doubt be even more ...

  • What Limits the Productivity of Acid Mine Drainage Treatment Ponds?

    Acid mine drainage (AMD) treatment ponds are very common in the U.S. Appalachian coal region and are the main source of many headwater streams. Though the water that discharges from these ponds generally meets state and federal water quality standards, there is a distinct lack of productivity in most of these ponds. Our first objective was to compare the productivity of chemically-treated, ...


    By Springer

  • Assessing aluminium toxicity in streams affected by acid mine drainage

    Acid mine drainage (AMD) has degraded water quality and ecology in streams on the Stockton Plateau, the site of New Zealand's largest open-cast coal mining operation. This has previously been attributed largely to the effects of acidity and elevated aluminium (Al) concentrations. However, the toxicity of dissolved Al is dependent on speciation, which is influenced by pH which affects Al ...


    By IWA Publishing

  • Mining, the environment and the treatment of mine effluents

    The environmental impact of mining on the ecosystem, including land, water and air, has become an unavoidable reality. Guidelines and regulations have been promulgated to protect the environment throughout mining activities from start-up to site decommissioning, in particular, the occurrence of acid mine drainage (AMD), due to oxidation of sulfide mineral wastes, has become the major area of ...


    By Inderscience Publishers

  • Influence of aldrich humic acid and metal precipitates on survivorship of mayflies (Atalophlebia spp.) to acid mine drainage

    Humic Substances (HS) have been shown to decrease the toxicity of environmental stressors, however, knowledge on their ability to influence the toxicity of multiple stressors such as metal mixtures and low pH associated with acid mine drainage (AMD) is still limited. The present study investigated the ability of HS to decrease toxicity of AMD to mayflies (Atalophlebia spp.). AMD was collected ...


    By John Wiley & Sons, Ltd.

  • Pumping 50 liters/second of extremely acid water in a copper mine

    In the largest underground copper mine in the world, near Santiago de Chile, Grindex Inox pumps are making money! The green colour in the extremely acid water, pH 3, is a result of the high copper content. The mine is interested in reclaiming that copper instead of just sending the water to the treatment plant. The Inox pumps in the picture replaced conventional end-suction pumps that were ...


    By Grindex Pumps

  • Anaerobic Bioremediation of Acid Mine Drainage using Emulsified Soybean Oil

    Batch incubation and flow-through column experiments were conducted to evaluate the use of emulsified soybean oil for in situ treatment of acid mine drainage. Addition of soybean oil, soluble substrates, and a microbial inoculum to the batch incubations resulted in complete depletion of SO4, 50% reduction in Fe, and an increase in pH to >6. A one time injection of emulsified soybean oil, lactate, ...


    By EOS Remediation, LLC

  • Case study - Fluidized bed material mitigates acidic mine drainage

    Since 1992, Headwaters Resources has used fluidized bed combustion products from the AES Thames Cogeneration Facility in Connecticut to improve the pH of groundwater at an active surface coal mine in Pennsylvania, and for ground contour restoration. The Thames Cogeneration Facility is a large fluidized bed coal combustion power facility in Uncasville, Connecticut. The facility produces 132,000 ...


    By Headwaters Resources, Inc.

  • Treatment of iron(II)-rich acid mine water with limestone and oxygen

    The main components of acid mine water are free acid, sulphate, and Fe2+. Limestone is the most cost-effective alkali that can be used for neutralization. The purpose of this investigation was to identify conditions where Fe2+ is removed with limestone and simultaneously oxidized with oxygen to Fe3+, in a polyvinyl chloride pipe under pressure. Gypsum ...


    By IWA Publishing

  • Hydrochemical changes in a reservoir that receives water contaminated by acid mine drainage

    The aim was to characterize hydrochemical changes that take place in the Sancho reservoir, which receives waters contaminated by acid mine drainage (AMD) from the Meca River (Iberian Pyrite Belt, SW Spain). The sampling procedure comprised bimonthly campaigns carried out between October 2011 and May 2012, in the entrance of the reservoir and in the input river waters. In addition to in situ ...


    By IWA Publishing

  • Two-stage combined treatment of acid mine drainage and municipal wastewater

    This study examined the feasibility of the combined treatment of field-collected acid mine drainages (AMD, pH = 4.2 ± 0.9, iron = 112 ± 118 mg/L, sulfate = 1,846 ± 594 mg/L) and municipal wastewater (MWW, avg. chemical oxygen demand (COD) = 234–333 mg/L) using a two-stage process. The process consisted of batch mixing of the two wastes to ...


    By IWA Publishing

  • Quantitative microbial community analysis of three different sulfidic mine tailing dumps generating acid mine drainage

    The microbial communities of three different sulfidic and acidic mine waste tailing dumps located in Botswana, Germany, and Sweden were quantitatively analyzed using quantitative real-time PCR (Q-PCR), fluorescence in situ hybridization (FISH), catalyzed reporter deposition-FISH (CARD-FISH), Sybr green II direct counting, and the most probable ...

  • Hydrochemical characterization of a river affected by acid mine drainage in the Iberian Pyrite Belt

    This paper addresses the modelling of the processes associated with acid mine drainage affecting the Trimpancho River basin, chosen for this purpose because of its location and paradigmatic hydrological, geological, mining and environmental contexts. By using physical-chemical indicators it is possible to define the contamination degree of the system from the perspective of an entire river ...


    By IWA Publishing

  • Buffering of Acidic Mine Lakes: The Relevance of Surface Exchange and Solid- Bound Sulphate

    Buffering mechanisms in an acidic mine lake in Lusatia, Germany were investigated. The titration curve has four sections with different buffering mechanisms: (1) buffering by free hydrogen ions and hydrogen sulphate (pH = 2.55-2.9), (2) buffering by Fe with bound SO4 (pH = 2.9-4.3), (3) buffering by Al with bound SO4 (pH = 4.3-5.5), and (4) buffering by surface exchange of SO4 and basic cations ...


    By Springer

  • Governance and socio-political issues in management of acid mine drainage in South Africa

    The water resources in South Africa are threatened by current and past mining practices such as abandoned and closed mines. While mining is considered valuable for its contribution to this country's gross domestic product, its polluting effects on water and land resources have been criticised as unsustainable. Acid mine drainage (AMD) is one specific public health and ecological issue that has ...


    By IWA Publishing

  • Pilot test of pollution control and metal resource recovery for acid mine drainage

    The study was undertaken in order to recover the metal resources from acid mine drainage (AMD). A 300 m3/d continuous system was designed and fractional precipitation technology employed for the main metals Fe, Cu, Zn, and Mn recovery. The system was operated for six months using actual AMD in situ. The chemicals' input and also the retention time was optimized. Furthermore, the ...


    By IWA Publishing

  • Integrated treatment of acid mine drainage using cryptocrystalline magnesite and barium chloride

    This study endeavours to report the efficiency of a hybrid approach in the treatment of acid mine drainage. Cryptocrystalline magnesite was used to pre-treat acid mine drainage and barium chloride was used to remove the residual sulphate through the formation of barium sulphate. Batch experimental approach was adopted and the documented optimum conditions for both cryptocrystalline magnesite ...


    By IWA Publishing

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