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Banks, S.B.; Banks, D. |
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Title |
Abandoned mines drainage; impact assessment and mitigation of discharges from coal mines in the UK |
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2001 |
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Geoenvironmental engineering Engineering Geology |
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31-37 |
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abandoned mines coal mines cost discharge drainage England environmental effects Europe feasibility studies Great Britain mine drainage mines mitigation pollution remediation Scotland United Kingdom Western Europe 22, Environmental geology |
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Abstract |
The UK has a legacy of pollution caused by discharges from abandoned coal mines, with the potential for further pollution by new discharges as groundwaters continue to rebound to their natural levels. In 1995, the Coal Authority initiated a scoping study of 30 gravity discharges from abandoned coal mines in England and Scotland. Mining information, geological information and water quality data were collated and interpreted in order to allow a preliminary assessment of the source and nature of each of the discharges. An assessment of the potential for remediation was made on the basis of the feasibility and relative costs of alternative remediation measures. Environmental impacts of the discharges and of the proposed remediation schemes were also assessed. The results, together with previous Coal Authority studies of discharges in Wales, were used by the Coal Authority, in collaboration with the former National Rivers Authority and the former Forth and Clyde River Purification Boards, to rank discharge sites in order of priority for remediation. |
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60 |
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Yong, R.N.; Thomas, H.R. |
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Abandoned mines drainage; impact assessment and mitigation of discharges from coal mines in the UK; GeoRef; English; 2001-052748; British Geotechnical Society, second conference on Geoenvironmental engineering, London, United Kingdom, Sept. 1999 References: 12; illus. incl. 2 tables |
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CBU @ c.wolke @ 16515 |
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31 |
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Ziemkiewicz, P.; Skousen, J.; Simmons, J. |
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Title |
Cost benefit analysis of passive treatment systems |
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2001 |
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acid mine drainage; acidification; Augusta coal field; Big Bear Lake; carbonate rocks; coal mines; cost; dams; drainage basins; economics; ferric iron; Indiana; iron; limestone; metals; mines; optimization; oxidation; Pike County Indiana; pollution; Preston County West Virginia; pyrite; sedimentary rocks; South Fork Patoka River; spoils; sulfate ion; sulfides; surface water; United States; water pollution; water quality; water resources; water treatment; West Virginia 22, Environmental geology |
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West Virginia Surface Mine Drainage Task Force Symposium |
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Proceedings, 22nd West Virginia surface mine drainage task force symposium |
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2002-047125; Twenty-second West Virginia surface mine drainage task force symposium, Morgantown, WV, United States, April 3-4, 2001 References: 7; illus. incl. 9 tables; GeoRef; English |
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CBU @ c.wolke @ 5766 |
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191 |
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Younger, P.L.; Cornford, C. |
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Mine water pollution from Kernow to Kwazulu-Natal; geochemical remedial options and their selection in practice |
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2002 |
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Africa Bolivia case studies Cornwall England cost decision-making decontamination Durham England England Europe geochemistry Great Britain Hlobane Colliery hydrology Kernow England KwaZulu-Natal South Africa metals Milluni Mine mine drainage monitoring pollutants pollution Quaking Houses England remediation South Africa South America South Crofty Mine South-West England Southern Africa United Kingdom water treatment Western Europe Wheal Jane Mine 22, Environmental geology |
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Pollution by mine drainage is a major problem in many parts of the world. The most frequent contaminants are Fe, Mn, Al and SO (sub 4) with locally important contributions by other metals/metalloids including (in order of decreasing frequency) Zn, Cu, As, Ni, Cd and Pb. Remedial options for such polluted drainage include monitored natural attenuation, physical intervention to minimise pollutant release, and active and passive water treatment technologies. Based on the assessment of the key hydrological and geochemical attributes of mine water discharges, a rational decision-making framework has now been developed for deciding which (or which combinations) of these options to implement in a specific case. Five case studies illustrate the application of this decision-making process in practice: Wheal Jane and South Crofty (Cornwall), Quaking Houses (Co Durham), Hlobane Colliery (South Africa) and Milluni Tin Mine (Bolivia). In many cases, particularly where the socio-environmental stakes are particularly high, the economic, political and ecological issues will prove even more challenging than the technical difficulties involved in implementing remedial interventions which will be robust in the long term. Hence truly “holistic” mine water remediation is a multi-dimensional business, involving teamwork by a range of geoscientific, hydroecological and socio-economic specialists. |
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Proceedings of the Ussher Society, vol.10, Part 3 |
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40th annual meeting of the Ussher Society |
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2004-019557; 40th annual meeting of the Ussher Society, Saint Austell, United Kingdom, Jan. 3-4, 2002 Scott Simpson lecture References: 39; illus. incl. 3 tables; GeoRef; English |
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CBU @ c.wolke @ 16506 |
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194 |
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Scharp, R.A.; Kawahara, F.; Burckle, J.; Allan, J.; Govind, R. |
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Recovery of metals from acid mine drainage Hardrock mining 2002; issues shaping the industry |
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2002 |
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acid mine drainage; bacteria; Berkeley Pit; Butte Montana; cost; decontamination; metals; mining; Montana; pH; pollution; recovery; remediation; Silver Bow County Montana; smelting; sulfates; United States 22, Environmental geology |
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Recovery of metals from acid mine drainage Hardrock mining 2002; issues shaping the industry; GeoRef; English; 2007-046147; 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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Call Number |
CBU @ c.wolke @ 5614 |
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251 |
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Author |
Mitchell, P.; Wheaton, A. |
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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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1999 |
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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 |
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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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