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Gobla, M.J. |
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A rapid response to cleanup – Gilt Edge Superfund Site, South Dakota |
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Journal Article |
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2002 |
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Tailings and Mine Waste '02 |
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421-425 |
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mine water treatment |
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The Gilt Edge gold mine is an acid drainage site that has been put on an accelerated closure schedule. The mine ceased activities in 1999 when Dakota Mining Corporation declared bankruptcy forcing the State of South Dakota to immediatly assume water treatment operations. Evaluation of conceptual closure plan options and cost estimates led the State of South Dakota to a decision to seek Federal assistance. The site has quickly moved into reclamation mode for the principal contamination source, the Ruby waste-rock dump. Designs and specifications for capping the Ruby waste-rock dump were prepared while Superfund listing was pursued. In October of 2000, mobilization of the first reclamation contractor began and by December the site was added to the National Priorities List. Capping the waste-rock dump will address a major acid drainage source. Water treatment requirements are expected to decline as conventional methods such as diverting clean water, backfilling, grading, capping, limestone neutralization, and revegetation are implemented. Acid seepage from underground workings, steep highwalls, and some pit backfills will remain. Major field trials of emerging technologies are nearing completion and some are showing promising results. Carbon reduction in a pit lake, and pyrite microencapsulation on simulated waste dumps, are showing initial success. Their application may minimize or eliminate the need for long-term active water treatment which has been a long sought goal for major acid rock drainage sites. |
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A rapid response to cleanup – Gilt Edge Superfund Site, South Dakota; Isip:000175560600055; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 17038 |
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160 |
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Younger, P.L.; Banwart, S.A. |
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2001 |
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419-421 |
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mine water |
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Preprints volume Conference 'Groundwater Quality 2001' (Third International Conference on Groundwater Quality, International Association of Hydrological Sciences) |
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Sheffield |
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Time-scale issues in the remediation of pervasively contaminated groundwaters at abandoned mines sites |
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Time-scale issues in the remediation of pervasively contaminated groundwaters at abandoned mines sites; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17629 |
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197 |
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Smith, I.J.H. |
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Title |
AMD treatment, it works but are we using the right equipment? |
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2000 |
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Tailings and mine waste ' |
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419-427 |
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Groundwater problems and environmental effects geomechanics abstracts: excavations (77 10 10) acid mine drainage conference proceedings methodology mine drainage remediation waste management |
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For the past 40 years various approaches have been developed to treat acid waters coming from abandoned as well as operating mining operations. System designs have evolved to meet increasingly stringent discharge permit limits for treated water, as well as to provide solid disposal within economic constraints. A treatment system for remediation of acid mine drainage (AMD) or acid groundwater (AG) requires two main steps: 1. The addition of chemicals to precipitate dissolved metals contained in the waters, and if necessary, to coagulate the precipitated solids ahead of physical separation. 2. Physical separation of the precipitated solids from the water so the water can be lawfully discharged from the site. Choosing the appropriate technology and equipment results in the most efficient plant design, the lowest capital outlay, and minimum operating cost. The goal of these plants is to discharge liquids and solids able to meet standards. The separation of solids from liquids can be achieved through various means, including gravity settling, flotation, mechanical dewatering, filtration and evaporation. As important as the liquid solids separation unit operations are, they are driven by the chemistry of the water to be treated. The content of the dissolved solids will influence the quality and quantity of the solids produced during precipitation. Thus the two aspects must be integrated, with chemistry first, then mechanical engineering. This presentation will provide an overview of a number of liquid solids separation tools currently being used to treat AMD-AG at several sites in the USA. It will also discuss how their operations are impacted by the chemistry of their particular acid water feeds. The tools used include clarifier-thickeners, solids contact clarifiers, dissolved air flotation, polishing filters, membrane filters, and mechanical dewatering devices (belt and filter presses, vacuum filters, and driers). |
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J.H. Smith III, SEPCO Incorporated, Fort Collins, CO, United States |
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Book; Conference-Paper; AMD treatment, it works but are we using the right equipment?; 2263351; Using Smart Source Parsing 00-Proceedings-of-the-7th-international-conference-Fort-Collins-January- 2000 Netherlands; Geobase |
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Call Number |
CBU @ c.wolke @ 17541 |
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237 |
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Author |
Groudev, S.N.; Georgiev, P.S.; Spasova, I.I.; Nicolova, M.N. |
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In situ treatment of mine waters by means of a permeable barrier |
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Journal Article |
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2000 |
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Groundwater 2000 |
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417-418 |
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mine water treatment |
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Acid ground waters contaminated with radioactive elements (U, Ra, Th), toxic heavy metals (Cu, Zn, Cd, Mn, Fe), arsenic and sulphates were treated by means of a permeable barrier. The barrier was filled with a mixture of biodegradable solid organic substrates (spent mushroom compost, sawdust and cow manure) and was inhabited by a mixed microbial community consisting of sulphate-reducing bacteria and other metabolically interdependent microorganisms. An efficient removal of the pollutants was achieved by this barrier during the different climatic seasons, even at ambient temperatures close to degrees C. The microbial dissimilatory sulphate reduction and the sorption of pollutants by the organic matter in the barrier were the main processes involved in this removal. |
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In situ treatment of mine waters by means of a permeable barrier; Isip:000088384300185; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 8407 |
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173 |
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Author |
Ye, Z.H. |
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Title |
Use of a wetland system for treating Pb/Zn mine effluent: A case study in southern China from 1984 to 2002 |
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2004 |
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Wetlands Ecosystems in Asia: Function and Management |
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1 |
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413-434 |
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mine water treatment |
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A constructed wetland system in Guangdong Province, South of China has been used for treating Pb/Zn mine discharge since 1984. In this chapter, the performance of this system in the purification of mine discharge, metal accumulation in different ecological compartments and ecological succession within the system during the period of 1984-2002 has been reviewed. The data show that the wetland system not only effectively remove metals (mainly Pb, Zn, Cd and Cu) and total suspended solids from the mine discharge over a long period leading to significant improvement in water quality, but also gradually increase diversity and abundance of living organisms. |
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Use of a wetland system for treating Pb/Zn mine effluent: A case study in southern China from 1984 to 2002; Isip:000226088800023; Times Cited: 0; ISI Web of Science |
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CBU @ c.wolke @ 16997 |
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155 |
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