| 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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76 |
Issue |
7 |
Pages |
30-31 |
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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 |
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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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Brunet, J.-F. |
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Drainages miniers acides; contraintes et remedes; etat des connaissances--Acid mine drainage; problems and remediation techniques; state of the art |
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Journal Article |
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2000 |
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Principaux Resultats Scientifiques – Bureau de Recherches Geologiques et Minieres |
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1999/2000 |
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97-98 |
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acid mine drainage; cost; decontamination; dissolved materials; efficiency; metals; pollutants; pollution; regulations; remediation; sulfides; technology; waste water; water treatment 22, Environmental geology |
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0766-7175 |
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Drainages miniers acides; contraintes et remedes; etat des connaissances--Acid mine drainage; problems and remediation techniques; state of the art; 2002-059955; France (FRA); GeoRef; French; English |
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CBU @ c.wolke @ 5888 |
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429 |
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Bienvenu, L. |
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Activites de recherche du ministere des Ressources naturelles du Quebec sur le drainage minier acide; activites realisees dans le cadre de l'Entente auxiliaire Canada-Quebec 1992-1998 sur le developpement mineral; rapport 1993-1994. Research activities of Quebec Natural Resources Ministry on acid mine drainage; research related to the Canada-Quebec agreement 1992-1998 on mineral development; report 1993-1994 |
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1994 |
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acid mine drainage; annual report; Canada; cost; Doyon Mine; Eastern Canada; methods; mining; mining geology; models; monitoring; organic compounds; organic materials; oxidation; permeability; pollution; programs; pyrite; Quebec; remediation; report; resins; sulfides; waste disposal; waste management; Weedon Mine 22, Environmental geology |
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Activites de recherche du ministere des Ressources naturelles du Quebec sur le drainage minier acide; activites realisees dans le cadre de l'Entente auxiliaire Canada-Quebec 1992-1998 sur le developpement mineral; rapport 1993-1994. Research activities of Quebec Natural Resources Ministry on acid mine drainage; research related to the Canada-Quebec agreement 1992-1998 on mineral development; report 1993-1994; 1995-039993; GeoRef; French; 18 tables Ministere des Ressources Naturelles, Charlesbourg, PQ, Canada |
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CBU @ c.wolke @ 6520 |
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448 |
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