| Records |
| Author |
Morfitt, B.; Brewer, W.; Frobel, R. |
| Title |
Cleaning up the Summitville Mine Superfund Site |
Type |
Journal Article |
| Year |
1998 |
Publication |
Geotechnical Fabrics Report |
Abbreviated Journal |
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Volume  |
16 |
Issue |
5 |
Pages |
38-41 |
| Keywords |
Geomembran Verbundstoff Abdichten Erdaufschüttung Erosion Schutz Bentonit Bergwerk Netz |
| Abstract |
A multi-layered geosynthetic system that includes geosynthetic-clay liners (GCL) and a geonet-composite drain (GNGC) is being used to cap and stabilize a 178000 m(exp 2) heap-leach pad at the Summitville Mine Superfund Site in Colorado. Selected were materials on the basis of design requirements for permeability, strength, extreme site conditions and cost. The Summitville cleanup called for a heap-leach pad cap to provide a barrier that would prevent precipitation from infiltrating the pad material. This long-term remediation prevents the pile from becoming saturated and allowing water to overflow the downslope dike, which could cause instability to dike and pond. Three geosynthetic alternatives were proposed. The contractor, that was awarded the heap leach pad, phase 2 contract, decided for a geosynthetic clay liner cap placed directly on the redesigned slopes. Bentofix NW-8 was used as GCL and TexNet TN was selected as the geocomposite drain. Conformance testing, subgrade preparation review, geosynthetic installation/repair inspection and review of cover material placement, performed by independent construction-quality assurance, showed that GCL is a well-suited cap material for heap leach pads, where high wind, cold temperatures rain and high altitude hinder construction. The robust geosynthetic allowed on-site coarse material to be used in the subgrade and cover layer, which saved the cost of importing more expensive bedding material. |
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US Bureau of Reclamation, Denver, US; Advanced Terra Testing, Lakewood, US; R K Frobel & Associates, Lakewood, US |
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0882-4983 |
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Cleaning up the Summitville Mine Superfund Site; 16974, BERG , 16.09.98; Words: 376; T9808 0249 178; 4 Seiten, 4 Bilder, 1 Tabelle 3TMP *intelligente Textilien, technische Textilien*; BERG, Copyright FIZ Technik e.V.; EN Englisch |
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no |
| Call Number |
CBU @ c.wolke @ 17599 |
Serial |
294 |
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| Author |
Burgess, J.E.; Stuetz, R.M. |
| Title |
Activated Sludge for the Treatment of Sulphur-rich Wastewaters |
Type |
Journal Article |
| Year |
2002 |
Publication |
Miner. Eng. |
Abbreviated Journal |
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| Volume |
15 |
Issue |
11 |
Pages |
839-846 |
| Keywords |
acid rock drainage biooxidation biotechnology environmental waste processing acid-mine drainage sulfate-reducing bacteria biological treatment waste-water metals acclimation remediation oxidation reduction removal |
| Abstract |
The aim of this investigation was to assess the potential of activated sludge for the remediation of sulphur-rich wastewaters. A pilot-scale activated sludge plant was acclimatised to a low load of sulphide and operated as a flow-through unit. Additional sludge samples from different full-scale plants were compared with the acclimatised and unacclimatised sludges using batch absorption tests. The effects of sludge source and acclimatisation on the ability of the sludge to biodegrade high loads of sulphide were evaluated. Acclimatisation to low-sulphide concentrations enabled the sludge to degrade subsequent high loads which were toxic to unacclimatised sludge. Acclimatisation was seen to be an effect of selection pressure on the biomass, suggesting that the treatment capability of activated sludge will develop after acclimation, indicating potential for treatment of acid mine drainage (AMD) by a standard wastewater treatment process. Existing options for biological treatment of AMD are described and the potential of activated sludge treatment for AMD discussed in comparison with existing technologies. (C) 2002 Elsevier Science Ltd. |
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0892-6875 |
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Nov.; Activated Sludge for the Treatment of Sulphur-rich Wastewaters; Isi:000179970500009; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/10093.pdf; AMD ISI | Wolkersdorfer |
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no |
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CBU @ c.wolke @ 10093 |
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40 |
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| Author |
Bosman, D.J. |
| Title |
Lime Treatment Of Acid-Mine Water And Associated Solids Liquid Separation |
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Journal Article |
| Year |
1983 |
Publication |
Water Sci. Technol. |
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| Volume |
15 |
Issue |
2 |
Pages |
71-84 |
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mine water treatment |
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Lime Treatment Of Acid-Mine Water And Associated Solids Liquid Separation; Wos:A1983qg97300005; Times Cited: 7; ISI Web of Science |
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no |
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CBU @ c.wolke @ 14794 |
Serial |
95 |
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| Author |
Perry, A.; Kleinmann, R.L.P. |
| Title |
The use of constructed wetlands in the treatment of acid mine drainage |
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Journal Article |
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1991 |
Publication |
Natural Resources Forum |
Abbreviated Journal |
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| Volume |
15 |
Issue |
3 |
Pages |
178-184 |
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quality standard water treatment constructed wetland pond system acid mine drainage USA 1 Geography |
| Abstract |
US government regulations require that all effluents from industrial operations, including mining, meet certain water quality standards. Constructed wetlands have proven to be useful in helping to attain those standards. Application of this biotechnology to mine water drainage can reduce water treatment costs and improve water quality in streams and rivers adversely affected by acidic mine water drainage from abandoned mines. Over 400 constructed wetland water treatment systems have been built on mined lands largely as a result of research by the US Bureau of Mines. Wetlands are passive biological treatment systems that are relatively inexpensive to construct and require minimal maintenance. Chemical treatment costs are reduced sufficiently to repay the cost of construction in less than a year. The mine waste water is typically treated in a series of excavated ponds that resemble small marsh areas. The ponds are engineered to facilitate bacterial oxidation of iron. Ideally, the water then flows through a composted organic substrate supporting a population of sulphate-reducing bacteria which raises the pH. Constructed wetlands in the US are described – their history, functions, construction methodologies, applicabilities, limitations and costs. -Authors |
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US Department of the Interior, Bureau of Mines, 2401 E Street, NW Washington, DC 20241, USA |
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The use of constructed wetlands in the treatment of acid mine drainage; (0895945); 92h-01979; Using Smart Source Parsing pp; Geobase |
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no |
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CBU @ c.wolke @ 17569 |
Serial |
272 |
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| Author |
Cravotta, C.A., III; Trahan, M.K. |
| Title |
Limestone drains to increase pH and remove dissolved metals from acidic mine drainage |
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Journal Article |
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1999 |
Publication |
Appl. Geochem. |
Abbreviated Journal |
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| Volume |
14 |
Issue |
5 |
Pages |
581-606 |
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manganese oxide redox processes sulfate waters iron-oxides adsorption ions oxidation surfaces environments aluminum |
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Despite encrustation by Fe and Al hydroxides, limestone can be effective for remediation of acidic mine drainage (AMD). Samples of water and limestone (CaCO3) were collected periodically for 1 a at 3 identical limestone-filled drains in Pennsylvania to evaluate the attenuation of dissolved metals and the effects of pH and Fe- and Al-hydrolysis products on the rate of CaCO3 dissolution. The influent was acidic and relatively dilute (pH < 4; acidity < 90 mg) but contained 1-4 mg . L-1 of O-2, Fe3+, Al3+ and Mn2+. The total retention time in the oxic limestone drains (OLDs) ranged from 1.0 to 3.1 hr. Effluent remained oxic (O-2 > 1 mg . L-1) but was near neutral (pH = 6.2-7.0); Fe and Al decreased to less than 5% of influent concentrations. As pH increased near the inflow, hydrous Fe and Al oxides precipitated in the OLDs, The hydrous oxides, nominally Fe(OH)(3) and Al(OH)(3), were visible as loosely bound, orange-yellow coatings on limestone near the inflow. As time elapsed, Fe(OH)(3) and Al(OH)(3) particles were transported downflow. The accumulation of hydrous oxides and elevated pH (> 5) in the downflow part of the OLDs promoted sorption and coprecipitation of dissolved Mn, Cu, Co, Ni and Zn as indicated by decreased concentrations of the metals in effluent and their enrichment relative to Fe in hydrous-oxide particles and coatings on limestone. Despite thick (similar to 1 mm) hydrous-oxide coatings on limestone near the inflow, CaCO3 dissolution was more rapid near the inflow than at downflow points within and the OLD where the limestone was not coated. The high rates of CaCO3 dissolution and Fe(OH3) precipitation were associated with the relatively low pH and high Fe3+ concentration near the inflow. The rate of CaCO3 dissolution decreased with increased pH and concentrations of Ca2+ and HCO3- and decreased Pco(2). Because overall efficiency is increased by combining neutralization and hydrolysis reactions, an OLD followed by a settling pond requires less land area than needed for a two-stagetreatment system consisting of an anoxic limestone drain and oxidation-settling pond or wetland. To facilitate removal of hydrous-oxide sludge, a perforated-pipe subdrain can be installed within an OLD. (C) 1999 Elsevier Science Ltd. |
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0883-2927 |
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Jul; Limestone drains to increase pH and remove dissolved metals from acidic mine drainage; Isi:000080043300004; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/10102.pdf; AMD ISI | Wolkersdorfer |
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no |
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CBU @ c.wolke @ 17470 |
Serial |
22 |
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