mine drainage Articles
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Application of horizontal-flow anaerobic immobilized biomass reactor for bioremediation of acid mine drainage
The production of low-pH effluent with sulfate and metals is one of the biggest environmental concerns in the mining industry. The biological process for sulfate reduction has the potential to become a low-cost solution that enables the recovery of interesting compounds. The present study analyzed such a process in a horizontal-flow anaerobic immobilized biomass (HAIB) reactor, employing ...
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A laboratory and in situ postexposure feeding assay with a freshwater snail
Contaminant‐driven feeding inhibition has direct and immediate consequences at higher levels of biological organization, by depressing the population consumption and thus hampering ecosystem functioning (e.g., grazing, organic matter decomposition). The present study aimed at developing a short‐term laboratory and in situ assay based on the postexposure feeding of the freshwater snail ...
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Biodepuration of domestic sewage, textile effluents and acid mine drainage using starch-based xerogel from recycled potato peels
Water is a finite resource. Its safety and cleanliness are highly important to meet current and future human needs. Compared to other resources, water represents a main factor to achieve development in several areas and leads to economic progress of a nation. However, in recent years, the excessive demographic and industrial growth has exacerbated water contamination. In this study, the ...
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Potential Groundwater Contamination with Toxic Metals in and Around an Abandoned Zn Mine, Korea
This study evaluated potential groundwater contamination with toxic metals in and around an abandoned zinc mine in Korea. Water levels in the mine waste dump indicated occurrence of a losing stream during the period of peak stream flow as a result of snowmelt runoff, which posed the threat of groundwater pollution. The pH values for the groundwaters were near neutral to slightly basic, with a ...
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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 ...
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Impact of AMD processes on the public water supply: hydrochemical variations and application of a classification model to a river in the Iberian Pyritic Belt S.W. Spain
The aim of this work is to formulate a rapid method for finding out the degree of water pollution in the field, based on the toxicity produced by sulfates and metals dissolved in solution, using simple pH measurement in rivers that undergo AMD processes and which flow into public water supply dams. A classification model based on the degree of the impact is proposed, which is applied to a river ...
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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 ...
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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 ...
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Effect of calcium oxide on the efficiency of ferrous ion oxidation and total iron precipitation during ferrous ion oxidation in simulated acid mine drainage treatment with inoculation of Acidithiobacillus ferrooxidans
Calcium oxide was added into ferrous ion oxidation system in the presence of Acidithiobacillus ferrooxidans at concentrations of 0–4.00 g/L. The pH, ferrous ion oxidation efficiency, total iron precipitation efficiency, and phase of the solid minerals harvested from different treatments were investigated during the ferrous ion oxidation process. In control check (CK) system, pH of the ...
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Studies on Microbial Heavy Metal Retention from Uranium Mine Drainage Water with Special Emphasis on Rare Earth Elements
Microbial heavy metal retention was studied using seepage water sampled from a former uranium mining site in Eastern Thuringia, Germany. The seepage water has a low pH and contains high concentrations of metals, including uranium, rare earth elements (REE), and other heavy metals. Microbial influence on sorption and/or active uptake of heavy metals was studied using REE patterns. Incubation of ...
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Iron removal in highly contaminated acid mine drainage using passive biochemical reactors
Passive biochemical reactors (PBRs) are a viable alternative to neutralization plants for the treatment of acid mine drainage (AMD) because they require lower investment costs and use residual materials. However, high iron (Fe) concentrations (≥0.5 g/L) in AMD are challenging for their long-term efficiency. Sorption and precipitation are the main Fe removal mechanisms, but the relative ...
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Characterisation of antimony, arsenic, cadmium, copper and tin occurrences at an abandoned sulphide-mining area
Contamination levels in top-soil, vascular plant and surface water samples from the Sao Domingos mining area, Portugal, were determined by Instrumental Neutron Activation Analysis (INAA) and Compton-Suppression Neutron Activation Analysis (CSNAA). The total levels of As, Cd, Cu, Sb and Sn are reported with a discussion of plant uptake and transfer coefficients. Comparative analysis of the same ...
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Destabilization dynamics of clay and acid-free polymers of ferric and magnesium salts in AMD without pH adjustment
The physicochemical treatment was employed to treat acid mine drainage (AMD) in the removal of turbid materials using clay only (exp A) and a combination of clay, FeCl3 and Mg(OH)2 (exp B) to form a polymer. A 5 g sample of clay (bentonite) was added to 1.2 L of AMD and treated in a jar test at 250 rpm for 2 min and reduced to 100 rpm for 10 min. A 200 mL sub-sample from the 1.2 L mother ...
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GCL serves as cost-effective, time saving alternative to compacted clay liner in mine drainage settlement pond
PROJECT: CONSOL Bailey Mine Tailings Pond LOCATION: West Finley, Pennsylvania PRODUCTS: BENTOMAT® SDN BACKGROUND: Bailey Mine, located in Southwestern Pennsylvania and owned by parent company CONSOL Energy Inc., supplies bituminous coal used in the generation of electricity. At the site, coal laden sediment is pumped to settlement ponds which are typically underlain with clay. As the ponds ...
By CETCO
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Brades Rise, Sandwell case study - Development on a former dump site affects 40 terraced houses
Brades Rise was originally a clay pit with a long history of municipal waste dumping, but given it was also adjacent to a factory had a significant quantitiy of industrial waste added to it. The pit was filled in and then became a sports ground.It was sold by a sports equipment manufacturer in the 1980s and in recent years has had several developers competing to build but planning applications ...
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The drainage of lake ‘L'Estany’ in Spain
In the 18th century, the practice of drying up the wetlands, marshy or stagnant water areas expanded throughout Europe in order to avoid the malaria fevers that the population periodically suffered and to recover land for farming. This communication describes the current knowledge about the history of the process of drying in various hydrological basins as well as the works in the endorheic ...
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Geochemical control processes and potential sediment toxicity in a mine‐impacted lake
Geochemical parameters and major ion concentrations from sediments of a freshwater lake in the town of Åtvidaberg, south‐eastern, Sweden, were used to identify the geochemical processes that control the water chemistry. The lake sediments are anoxic, characterized by reduced sulphur and sulphidic minerals. The hypothesis tested is that in sulphidic‐anaerobic contaminated sediments, the ...
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Release of metals and arsenic from various mine tailings by Eriophorum angustifolium
Abstract Previous investigations have found that plants grown on sulphide-rich mine tailings have phytostabilising effects on acid mine drainage (AMD) by decreasing the pH and preventing the release of metals. The possibility of similar effects on tailings containing other minerals was investigated here. The aim was to examine the effects of Eriophorum angustifolium on four water-covered mine ...
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Tube-Type Skimming in Mining operations – A Simple Oil Removal Solution
A steady flow of technological innovations in electronics, construction, healthcare and other fields is driving the resurgence of copper mining throughout the world. In Peru alone, copper production jumped nine percent in the first three months of 2014.* Industry observers predict that the demand for copper will continue to grow at a fast clip for at least the next five years. Along with the ...
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Optimising the Rehabilitation of polluted Mine Tailings and Water by SupaZorb
To date the polluted acid mine drainage (AMD) – the second biggest environmental problem of the world - from South Africa’s gold mines, was characterised and treated by the precipitation of heavy metals with lime and sulphates, by means of iron exchange. The chemical treatment with expensive and toxic caustic soda (Sodium Hydroxide, NaOH) is to lift the pH, in order to reduce the corrosion on ...
By SupaZOrb
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