| Records |
Author  |
Dillard, G. |
| Title |
A win-win way to clean up by changing ionic state, new process can precipitate heavy metals |
Type |
Journal Article |
| Year |
2000 |
Publication |
Pay Dirt |
Abbreviated Journal |
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| Volume |
734 |
Issue |
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Pages |
10-11 |
| Keywords |
acid mine drainage; California; chemical composition; companies; environmental analysis; environmental management; heavy metals; ion exchange; ions; metal ores; metals; mining; pollutants; pollution; precipitation; processes; remediation; soils; surface water; United States; water treatment 22, Environmental geology |
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A win-win way to clean up by changing ionic state, new process can precipitate heavy metals; 2004-029026; illus. United States (USA); GeoRef; English |
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no |
| Call Number |
CBU @ c.wolke @ 5822 |
Serial |
401 |
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| Author |
Diz, H.R. |
| Title |
Chemical and biological treatment of acid mine drainage for the removal of heavy metals and acidity |
Type |
Book Whole |
| Year |
1997 |
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acid mine drainage; copper; effluents; ferrous iron; heavy metals; iron; manganese; metals; nickel; oxidation; pH; pollution; precipitation; rates; tailings; temperature; waste water; zinc 22, Environmental geology |
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Ph.D. thesis |
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Virginia Polytechnic Institute and State University, |
Place of Publication |
Blacksburg |
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Chemical and biological treatment of acid mine drainage for the removal of heavy metals and acidity; GeoRef; English |
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no |
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CBU @ c.wolke @ 6316 |
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400 |
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| Author |
Dumpleton, S. |
| Title |
Mitigation of minewater pollution; the need for research, monitoring and prevention |
Type |
Journal Article |
| Year |
1998 |
Publication |
Earthwise (Keyworth) |
Abbreviated Journal |
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12 |
Issue |
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Pages |
12-13 |
| Keywords |
acid mine drainage; coal mines; coal seams; disposal barriers; engineering geology; England; Europe; fractures; Great Britain; ground water; hydrogeology; hydrology; inorganic acids; mines; mining; mining geology; mitigation; pollution; pumping; remediation; runoff; sulfuric acid; surface water; United Kingdom; waste disposal; water table; Western Europe 22, Environmental geology |
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0967-9669 |
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Mitigation of minewater pollution; the need for research, monitoring and prevention; 1998-075248; illus. incl. sect. United Kingdom (GBR); GeoRef; English |
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no |
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CBU @ c.wolke @ 6120 |
Serial |
399 |
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| Author |
Dunn, J.; Russell, C.; Morrissey, A. |
| Title |
Remediating historic mine sites in Colorado |
Type |
Journal Article |
| Year |
1999 |
Publication |
Min. Eng. |
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51 |
Issue |
8 |
Pages |
32-35 |
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Reclamation and conservation Groundwater problems and environmental effects geological abstracts: environmental geology (72 14 1) geomechanics abstracts: excavations (77 10 10) abandoned mine acid mine drainage environmental effect remediation United States Colorado |
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This article provides examples of reclamation and remediation in Colorado watersheds. The projects were undertaken by the US Environmental Protection Agency (EPA) Region 8, in cooperation with the Colorado Division of Minerals and Geology (CDMG), Colorado Department of Public Health and Environment (CDPHE), US Forest Service (USFS), the Bureau of Land Management (BLM), Bureau of Reclamation (BOR) and the US Geological Survey (USGS). These agencies collaborated on the environmental problems at abandoned mines. These samples involved the interaction of surface and ground waters with sulfide-bearing rocks, mine workings and surface mine spoils that produce acid solutions charged with heavy metals that are toxic to organisms. In these examples, acid mine drainage from historic mines in Colorado has been approached cooperatively with stakeholders. Each example emphasizes one aspect of the three-stage process. These stages include characterization and prioritization, hydrologic controls and the evaluation of long-term remediation activities. |
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J. Dunn, US Environmental Protection Agency, Region 8, 999 18(th) St., Suite 500, Denver, CO 80202-2466, United States |
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0026-5187 |
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Remediating historic mine sites in Colorado; 0434641; United-States; Geobase |
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no |
| Call Number |
CBU @ c.wolke @ 17547 |
Serial |
398 |
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| Author |
Earley, D., III; Schmidt, R.D.; Kim, K. |
| Title |
Is sustainable mining an oxymoron? |
Type |
Journal Article |
| Year |
1997 |
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acids data processing development ground water leaching mineral resources mining mining geology models monitoring pollution production solutions 26A Economic geology, general, deposits 22 Environmental geology |
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Sustainable mining is generally considered to be an oxymoron because mineral deposits are viewed as nonrenewable resources that are fixed in the crust. However, minerals are conserved and recycled by plate tectonics which continually creates and destroys ore deposits. Though it is true that rock cycles have much longer periods than biomass cycles, the crust is essentially an infinite reservoir so long as we continue to invest in mineral exploration and processing technology. Implicit in the definition of sustainable development is the recognition that human development of resources in one reservoir may subsequently degrade resources supplied by another. The depreciation of overlapping and adjacent resources is often externalized in the cost to benefit accounting and cannot be sustained if the integrated cost/benefit ratio is greater than 1. The greatest obstacle to sustainability in mining is the expanding scale of excavation required to develop leaner ores because this activity degrades connected resources. In the case of open pit, sulfide ore mining the disturbed land may produce acid rock drainage (ARD). Because ARD will self-generate over the course of tens to hundreds of years the cost of controlling this pollution and rehabilitating mined lands is large and often spread over many generations. Secondary production of minerals from partially excavated deposits where there are preexisting environmental impacts and mine infrastructure help to reduce the risk of depreciating pristine resources, provided that new mining operations “do no (additional) harm” (Margoles, 1996). In turn, a percentage of the profits derived from secondary mineral production can be used for rehabilitation of the previously mined lands. These lands contain significant, albeit low grade, metal concentrations. These concepts are being developed and tested at the Mineral Park Sustainable Mining Research Facility where an in situ copper sulfide mining field experiment was conducted. Monitoring data and computer modeling indicate that ARD is not generated after closure. This is because the ore is not disturbed and is left saturated, whereas unsaturated conditions generate acidic drainage. The short term risk of groundwater contamination is mitigated by utilizing an exempt mine pit to capture any leach solutions that are not intercepted by the wellfield. Using green accounting techniques and transfer models it can be communicated that this mining scenario is an approach to sustainability. |
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Abstracts with Programs - Geological Society of America |
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Geological Society of America, 1997 annual meeting |
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1998-051450; Geological Society of America, 1997 annual meeting, Salt Lake City, UT, United States, Oct. 20-23, 1997; GeoRef; English |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 16638 |
Serial |
396 |
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