| Records |
| Author |
Kleinmann, R.L.P. |
| Title |
Acid Mine Water Treatment using Engineered Wetlands |
Type |
Journal Article |
| Year |
1990 |
Publication |
Int. J. Mine Water |
Abbreviated Journal |
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| Volume |
9 |
Issue |
1-4 |
Pages |
269-276 |
| Keywords |
wetlands AMD passive treatment pollution control water treatment abandoned mines biological treatment pH bacterial oxidation wetland sizing sphagnum |
| Abstract |
400 systems installed within 4 years During the last two decades, the United States mining industry has greatly increased the amount it spends on pollution control. The application of biotechnology to mine water can reduce the industry's water treatment costs (estimated at over a million dollars a day) and improve water quality in streams and rivers adversely affected by acidic mine water draining from abandoned mines. Biological treatment of mine waste water is typically conducted in a series of small excavated ponds that resemble, in a superficial way, a small marsh area. The ponds are engineered to first facilitate bacterial oxidation of iron; ideally, the water then flows through a composted organic substrate that supports a population of sulfate-reducing bacteria. The latter process raises the pH. During the past four years, over 400 wetland water treatment systems have been built on mined lands as a result of research by the U.S. Bureau of Mines. In general, mine operators find that the wetlands reduce chemical treatment costs enough to repay the cost of wetland construction in less than a year. Actual rates of iron removal at field sites have been used to develop empirical sizing criteria based on iron loading and pH. If the pH is 6 or above, the wetland area (in2) required is equivalent to the iron. load (grams/day) divided by 10. Theis requirement doubles at a pH of 4 to 5. At a pH below 4, the iron load (grams/day) should be divided by 2 to estimate the area required (in2). |
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0255-6960 |
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Acid Mine Water Treatment using Engineered Wetlands; 1; Fg; AMD ISI | Wolkersdorfer |
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CBU @ c.wolke @ 17368 |
Serial |
328 |
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| Author |
Niyogi, D.K.; McKnight, D.M.; Lewis, W.M., Jr.; Kimball, B.A. |
| Title |
Experimental diversion of acid mine drainage and the effects on a headwater stream |
Type |
Journal Article |
| Year |
1999 |
Publication |
Water-Resources Investigations Report |
Abbreviated Journal |
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| Volume |
Wri 99-4018-A |
Issue |
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Pages |
123-130 |
| Keywords |
abandoned mines acid mine drainage algae benthonic taxa biomass biota Colorado experimental studies heavy metals Lake County Colorado Leadville Colorado metals mines pH Plantae pollution remediation Saint Kevin Gulch Colorado tracers United States USGS water zinc |
| Abstract |
An experimental diversion of acid mine drainage was set up near an abandoned mine in Saint Kevin Gulch, Colorado. A mass-balance approach using natural tracers was used to estimate flows into Saint Kevin Gulch. The diversion system collected about 85 percent of the mine water during its first year of operation (1994). In the first 2 months after the diversion, benthic algae in an experimental reach (stream reach around which mine drainage was diverted) became more abundant as water quality improved (increase in pH, decrease in zinc concentrations) and substrate quality changed (decrease in rate of metal hydroxide deposition). Further increases in pH to levels above 4.6, however, led to lower algal biomass in subsequent years (1995-97). An increase in deposition of aluminum precipitates at pH greater than 4.6 may account for the suppression of algal biomass. The pH in the experimental reach was lower in 1998 and algal biomass increased. Mine drainage presents a complex, interactive set of stresses on stream ecosystems. These interactions need to be considered in remediation goals and plans. |
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0092-332x |
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Experimental diversion of acid mine drainage and the effects on a headwater stream; 2; GeoRef: 2001-017199 als Datei vorhanden 4 Abb.; VORHANDEN | AMD ISI | Wolkersdorfer |
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no |
| Call Number |
CBU @ c.wolke @ 17398 |
Serial |
286 |
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| Author |
Younger, P.L. |
| Title |
Holistic remedial strategies for short- and long-term water pollution from abandoned mines |
Type |
Journal Article |
| Year |
2000 |
Publication |
Transactions of the Institution of Mining and Metallurgy Section a-Mining Technology |
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| Volume |
109 |
Issue |
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Pages |
A210-A218 |
| Keywords |
abandoned mines acid mine drainage Europe mines mining planning pollution remediation United Kingdom water pollution Western Europe |
| Abstract |
Where mining proceeds below the water-table-as it has extensively in Britain and elsewhere-water ingress is not only a hindrance during mineral extraction but also a potential liability after abandonment. This is because the cessation of dewatering that commonly follows mine closure leads to a rise in the water-table and associated, often rapid, changes in the chemical regime of the subsurface. Studies over the past two decades have provided insights into the nature and time-scales of these changes and provide a basis for rational planning of mine-water management during and after mine abandonment. The same insights into mine-water chemistry provide hints for the efficient remediation of pollution (typically due to Fe, Mn and Al and, in some cases, Zn, Cd, Pb and other metals). Intensive treatment (by chemical dosing with enhanced sedimentation or alternative processes, such as sulphidization or reverse osmosis) is often necessary only during the first few years following complete flooding of mine voids. Passive treatment (by the use of gravity-flow geochemical reactors and wetlands) may be both more cost-effective and ecologically more responsible in the long term. By the end of 1999 a total of 28 passive systems had been installed at United Kingdom mine sites, including examples of system types currently unique to the United Kingdom. Early performance data for all the systems are summarized and shown to demonstrate the efficacy of passive treatment when appropriately applied. |
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0371-7844 |
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Holistic remedial strategies for short- and long-term water pollution from abandoned mines; Wos:000167240600013; Times Cited: 2; ISI Web of Science |
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no |
| Call Number |
CBU @ c.wolke @ 17458 |
Serial |
126 |
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| Author |
Rees, B. |
| Title |
An overview of passive mine water treatment in Europe |
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Journal Article |
| Year |
2005 |
Publication |
Mine Water Env. |
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| Volume |
24 |
Issue |
1 |
Pages |
26-28 |
| Keywords |
abandoned mines; Europe; ground water; mines; mining; pollutants; pollution; protection; surface water; water pollution; water quality; water treatment 22, Environmental geology |
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1025-9112 |
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An overview of passive mine water treatment in Europe; 2007-023994; 1 table Federal Republic of Germany (DEU); GeoRef; English |
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no |
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CBU @ c.wolke @ 5411 |
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19 |
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| Author |
Coulton, R.H.; Williams, K.P. |
| Title |
Active treatment of mine water; a European perspective |
Type |
Journal Article |
| Year |
2005 |
Publication |
Mine Water Env. |
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24 |
Issue |
1 |
Pages |
23-26 |
| Keywords |
abandoned mines; Europe; ground water; mines; mining; pollutants; pollution; protection; surface water; water pollution; water quality; water treatment 22, Environmental geology |
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1025-9112 |
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Active treatment of mine water; a European perspective; 2007-023995; illus. incl. 3 tables Federal Republic of Germany (DEU); GeoRef; English |
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| Call Number |
CBU @ c.wolke @ 5412 |
Serial |
20 |
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