Records |
Author |
Mitchell, P.; Wheaton, A. |
Title |
From environmental burden to natural resource; new reagents for cost-effective treatment of, and metal recovery from, acid rock drainage |
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Book Chapter |
Year |
1999 |
Publication |
Sudbury '99; Mining and the environment II; Conference proceedings |
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acid mine drainage Bunker Hill Mine cost decontamination Idaho metal ores mines mitigation natural resources pollution reagents recovery Shoshone County Idaho sludge United States zinc ores 22 Environmental geology 27A Economic geology, geology of ore deposits |
Abstract |
Acid rock drainage remains the greatest environmental issue faced by the mining sector and as the new millennium approaches, low capital/operating cost treatments remain elusive. Therefore as part of an ongoing process to develop a leading edge, innovative and cost-effective approach, pilot trials were conducted by KEECO in collaboration with the New Bunker Hill Mining Company on a substantial and problematic metal-contaminated acid flow, emanating from underground workings at the Bunker Hill Mine, Idaho. The aims of the work were fourfold. First to assess the capacity of KEECO's unique Silica Micro Encapsulation (SME) reagents and associated dosing systems to cost-effectively decontaminate the acid flow to stringent standards set by the U.S. Environmental Protection Agency (USEPA), where alternative and standard technologies had failed. Second, to demonstrate that treatment using a compact system suitable for underground installation. Third, to demonstrate that the treatment sludge had enhanced chemical stability in absolute terms and relative to standard approaches. Fourth, to examine the potential for resource recovery via sequential precipitation. Although the focus to date has been the development of a cost-effective treatment technology, the latter aim was considered essential in light of the growing pressure on all industrial sectors to develop tools for environmentally sustainable economic growth and the growing demands of stakeholders for improved resource usage and recycling. Two phases of work were undertaken: a laboratory-based scoping exercise followed by installation within the mine workings of a compact reagent delivery/shear mixing unit capable of treating the full flow of 31 L s (super -1) . At a dose rate of 2.0 g L (super -1) (equivalent to a final treated water pH range of 7-9), the SME reagent KB-1 reduced metal concentrations to levels approaching the U.S. Drinking Water Standards, which no other treatment piloted at the site had achieved. Based on the USEPA's Toxicity Characteristic Leaching Procedure, the sludge arising from the treatment was classified as non-hazardous. Operating costs compared favourably with those of lime use, while estimated capital costs were considerably lower due to the compact nature of the reagent delivery system and the rapid settling characteristics of the treatment sediment. Resource recovery was attempted using a two-stage selective precipitation approach. The first stage involved pH adjustment to 5.5 (by addition of 1.5 g L (super -1) of KB-1) to produce a sludge enriched in aluminium, iron and manganese, with lesser amounts of arsenic, nickel, lead and zinc. Further KB-1 addition to a total of 2.1 g L (super -1) generated sludge enriched in zinc (33% by dry weight), demonstrating that resource recovery is theoretically feasible. Further work on downstream processing is required, although it is considered that the most likely route for zinc metal recovery will be high temperature/pressure due to the chemically inert nature of the zinc-rich sediment. |
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Goldsack, D.E.; Belzile, N.; Yearwood, P.; Hall, G.J. |
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0886670470 |
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From environmental burden to natural resource; new reagents for cost-effective treatment of, and metal recovery from, acid rock drainage; GeoRef; English; 2000-048642; Sudbury '99; Mining and the environment II, Sudbury, ON, Canada, Sept. 13-17, 1999 References: 3; illus. incl. 5 tables |
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CBU @ c.wolke @ 16593 |
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296 |
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Author |
Landers, J. |
Title |
Bioremediation method could cut cost of treating acid rock drainage |
Type |
Journal Article |
Year |
2006 |
Publication |
Civil Engineering |
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Volume |
76 |
Issue |
7 |
Pages |
30-31 |
Keywords |
Pollution and waste management non radioactive geological abstracts: environmental geology (72 14 2) bioremediation cost benefit analysis water treatment acid mine drainage pollutant removal lake water heavy metal Lawrence County South Dakota South Dakota United States North America |
Abstract |
The Gilt Edge Mine in South Dakota's Lawrence County was a gold mine that was abandoned later when its recent owner went bankrupt. Seeking a cost-effective method for treating millions of gallons of acid rock drainage (ARD), CDM partnered with Green World Science, Inc. (GWS) of Boise, Idaho, for the development of an in situ bioremediation process that can be used to remove metals from pit lake water. Recent testing revealed that the in situ bioremediation method can successfully remove metals from highly acidic water without the need to construct costly water treatment facilities. |
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0885-7024 |
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Trade-; Bioremediation method could cut cost of treating acid rock drainage; 2896866; United-States; Geobase |
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CBU @ c.wolke @ 17490 |
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318 |
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Kingham, N.W.; Semenak, R.; Powell, G.; Way, S. |
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Reverse osmosis coupled with chemical precipitation treatment of acid mine leachate at the Basin-Luttrell Pit, Ten Mile Creek Site, Lewis and Clark County, Montana Hardrock mining 2002; issues shaping the industry |
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Book Chapter |
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2002 |
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acid mine drainage; Basin-Luttrell Pit; cost; environmental effects; leachate; Lewis and Clark County Montana; metals; Montana; osmosis; pollutants; pollution; precipitation; reverse osmosis; soils; sulfates; tailings; Ten Mile Creek; United States; waste rock; waste water; water treatment 22, Environmental geology |
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Reverse osmosis coupled with chemical precipitation treatment of acid mine leachate at the Basin-Luttrell Pit, Ten Mile Creek Site, Lewis and Clark County, Montana Hardrock mining 2002; issues shaping the industry; GeoRef; English; 2007-046128; Hardrock mining 2002; issues shaping the industry, Westminster, CO, United States, May 7-9, 2002 U. S. Environmental Protection Agency, Office of Research and Development, Washington, DC, United States |
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CBU @ c.wolke @ 5610 |
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331 |
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Ketellapper, V.L.; Williams, L.O.; Bell, R.S.; Cramer, M.H. |
Title |
The control of acid mine drainage at the Summitville Mine Superfund Site |
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Book Chapter |
Year |
1996 |
Publication |
Proceedings of the Symposium on the Application of Geophysics to Environmental and Engineering Problems (SAGEEP), vol.1996 |
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Pages |
303-311 |
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acid mine drainage Colorado Del Norte Colorado gold ores metal ores mines mining mining geology open-pit mining pollutants pollution remediation Rio Grande County Colorado Summitville Mine Superfund sites surface mining United States water quality 22, Environmental geology |
Abstract |
The Summitville Mine Superfund Site is located about 25 miles south of Del Norte, Colorado, in Rio Grande County. Occurring at an average elevation of 11,500 feet in the San Juan Mountain Range, the mine site is located two miles east of the Continental Divide. Mining at Summitville has occurred since 1870. The mine was most recently operated by Summitville Consolidated Mining Company, Inc. (SCMCI) as an open pit gold mine with extraction by means of a cyanide leaching process. In December of 1992, SCMCI declared bankruptcy and vacated the mine site. At that time, the US Environmental Protection Agency (EPA) took over operations of the water treatment facilities to prevent a catastrophic release of cyanide and metal-laden water from the mine site. Due to high operational costs of water treatment (approximately $50,000 per day), EPA established a goal to minimize active water treatment by reducing or eliminating acid mine drainage (AMD). All of the sources of AMD generation on the mine site were evaluated and prioritized. Of the twelve areas identified as sources of AMD, the Cropsy Waste Pile, the Summitville Dam Impoundment, the Beaver Mud Dump, the Reynolds and Chandler adits, and the Mine Pits were consider to be the most significant contributors to the generation of metal-laden acidic (low pH) water. A two part plan was developed to control AMD from the most significant sources. The first part was initiated immediately to control AMD being released from the Site. This part focused on improving the efficiency of the water treatment facilities and controlling the AMD discharges from the mine drainage adits. The discharges from the adits was accomplished by plugging the Reynolds and Chandler adits. The second part of the plan was aimed at reducing the AMD generated in groundwater and surface water runoff from the mine wastes. A lined and capped repository located in the mine pits for acid generating mining waste and water treatment plant sludge was found to be the most feasible alternative. Beginning in 1993, mining wastes which were the most significant sources of AMD were being excavated and placed in the Mine Pits. In November 1995, all of the waste from these sources had been excavated and placed in the the Mine Pits. This paper discusses EPA's overall approach to stabilize on-site sources sufficiently such that aquatic, agricultural, and drinking water uses in the Alamosa watershed are restored and/or maintained with minimal water treatment. |
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The control of acid mine drainage at the Summitville Mine Superfund Site; GeoRef; English; 2002-027195; Symposium on the Application of geophysics to engineering and environmental problems, Keystone, CO, United States, April 28-May 2, 1996 References: 11; illus. incl. geol. sketch map |
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Call Number |
CBU @ c.wolke @ 16654 |
Serial |
334 |
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Author |
Jage, C.R.; Zipper, C.E. |
Title |
Acid-mine drainage treatment using successive alkalinity-producing systems |
Type |
RPT |
Year |
2000 |
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Keywords |
acid mine drainage; alkalinity; Appalachians; carbonate rocks; decontamination; dissolved materials; dissolved oxygen; limestone; North America; oxygen; pH; pollution; reclamation; sedimentary rocks; United States; Virginia; waste management; water treatment 22, Environmental geology |
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Virginia Polytechnic Institute and State University, P.R.P.B.V.A.U.S. |
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Powell River Project research and education program reports |
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Acid-mine drainage treatment using successive alkalinity-producing systems; 2002-029549; GeoRef; English; References: 12; illus. incl. 2 tables U. S. Geological Survey, Library, Reston, VA, United States |
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CBU @ c.wolke @ 5882 |
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343 |
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