| 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 |
Type |
Book Chapter |
| Year |
1999 |
Publication |
Sudbury '99; Mining and the environment II; Conference proceedings |
Abbreviated Journal |
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Issue |
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Pages |
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| Keywords |
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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Editor  |
Goldsack, D.E.; Belzile, N.; Yearwood, P.; Hall, G.J. |
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ISBN |
0886670470 |
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| Notes |
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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no |
| Call Number |
CBU @ c.wolke @ 16593 |
Serial |
296 |
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| Author |
Bowell, R.J. |
| Title |
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Type |
Book Whole |
| Year |
2004 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
75-91 |
| Keywords |
mine water sulphate removal passive treatment acid mine drainage bacteria bioremediation decontamination effluents ground water legislation osmosis oxidation pollutants pollution remediation reverse osmosis selenites sulfate ion toxic materials USGS water treatment |
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University of Newcastle |
Place of Publication |
2 |
Editor |
Jarvis Adam, P.; Dudgeon Bruce, A.; Younger Paul, L. |
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Series Title |
mine water 2004 – Proceedings International Mine Water Association Symposium |
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ISBN |
0-9543827-4-9 |
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| Notes |
A review of sulphate removal options for mine waters; 1; AMD ISI | Wolkersdorfer; FG 6 Abb., 7 Tab. |
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no |
| Call Number |
CBU @ c.wolke @ 9546 |
Serial |
439 |
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| Author |
Gusek, J.J.; Wildeman, T.R. |
| Title |
New developments in passive treatment of acid rock drainage Pollution prevention for process engineering |
Type |
Book Chapter |
| Year |
1995 |
Publication |
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Issue |
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Pages |
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| Keywords |
acid mine drainage; aerobic environment; alkalinity; bioaccumulation; bioremediation; constructed wetlands; decontamination; disposal barriers; geomembranes; heavy metals; hydroxides; nutrients; oxides; pH; physical properties; pollution; reclamation; remediation; soils; tailings; techniques; toxic materials; vegetation; waste disposal; water quality; wetlands 22, Environmental geology |
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Engineering Foundation |
Place of Publication |
New York |
Editor |
Richardson, P.E.; Scheiner, B.J.; Lanzetta, F., Jr. |
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ISBN |
0939204533 |
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| Notes |
New developments in passive treatment of acid rock drainage Pollution prevention for process engineering; GeoRef; English; 2000-063657; Engineering Foundation conference on Technical solution for pollution prevention in the mining and mineral processing industries, Palm Coast, FL, United States, Jan. 22-27, 1995 References: 3; illus. incl. 1 table |
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no |
| Call Number |
CBU @ c.wolke @ 6447 |
Serial |
363 |
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| Author |
Miller, S.D. |
| Title |
Overview of acid mine drainage issues and control strategies Remediation and management of degraded lands |
Type |
Book Chapter |
| Year |
1999 |
Publication |
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Abbreviated Journal |
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Issue |
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Pages |
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| Keywords |
acid mine drainage; controls; decontamination; environmental analysis; environmental effects; geochemistry; ground water; land management; lime; oxidation; pH; pollutants; pollution; preventive measures; risk assessment; soils; sulfides; surface water; waste disposal; waste management 22, Environmental geology |
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Lewis Publishers |
Place of Publication |
Boca Raton |
Editor |
Wong, M.H.; Wong, J.W.C.; Baker, A.J.M. |
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ISBN |
157504109x |
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| Notes |
Overview of acid mine drainage issues and control strategies Remediation and management of degraded lands; GeoRef; English; 2000-057936 |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 5951 |
Serial |
298 |
| Permanent link to this record |
