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Wingenfelder, U.; Hansen, C.; Furrer, G.; Schulin, R. |
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Title |
Removal of heavy metals from mine waters by natural zeolites |
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Journal Article |
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Year |
2005 |
Publication |
Environ Sci Technol, ES & T |
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39 |
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12 |
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4606-4613 |
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Groundwater problems and environmental effects Pollution and waste management non radioactive remediation heavy metal mine drainage acid mine drainage; acidification; Central Europe; chemical composition; chemical fractionation; dissolved materials; Europe; framework silicates; geochemistry; grain size; heavy metals; hydrochemistry; ion exchange; lead; metals; mines; mining; mobilization; models; pH; pollutants; pollution; precipitation; remediation; samples; silicates; spectra; Switzerland; toxic materials; X-ray diffraction data; X-ray fluorescence spectra; zeolite group |
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G. Furrer, Institute of Terrestrial Ecology, Swiss Federal Institute of Technology, Zurich, Grabenstrasse 3, CH-8952 Schlieren, Switzerland gerhard.furrer@env.ethz.ch |
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0013-936x |
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Removal of heavy metals from mine waters by natural zeolites; 2006-086777; References: 42; illus. incl. 3 tables United States (USA); GeoRef; English |
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CBU @ c.wolke @ 5382 |
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71 |
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Fisher, T.S.R.; Lawrence, G.A. |
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Title |
Treatment of acid rock drainage in a meromictic mine pit lake |
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Journal Article |
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Year |
2006 |
Publication |
Journal of environmental engineering |
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132 |
Issue |
4 |
Pages |
515-526 |
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Pollution and waste management non radioactive Groundwater problems and environmental effects geological abstracts: environmental geology (72 14 2) geomechanics abstracts: excavations (77 10 10) meromictic lake acid mine drainage mine waste copper water pollution Bacteria microorganisms Canada Vancouver Island British Columbia North America |
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The Island Copper Mine pit near Port Hardy, Vancouver Island, B.C., Canada, was flooded in 1996 with seawater and capped with fresh water to form a meromictic (permanently stratified) pit lake of maximum depth 350 m and surface area 1.72 km2. The pit lake is being developed as a treatment system for acid rock drainage. The physical structure and water quality has developed into three distinct layers: a brackish and well-mixed upper layer; a plume stirred intermediate layer; and a thermally convecting lower layer. Concentrations of dissolved metals have been maintained well below permit limits by fertilization of the surface waters. The initial mine closure plan proposed removal of heavy metals by metal-sulfide precipitation via anaerobic sulfate-reducing bacteria, once anoxic conditions were established in the intermediate and lower layers. Anoxia has been achieved in the lower layer, but oxygen consumption rates have been less than initially predicted, and anoxia has yet to be achieved in the intermediate layer. If anoxia can be permanently established in the intermediate layer then biogeochemical removal rates may be high enough that fertilization may no longer be necessary. < copyright > 2006 ASCE. |
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Prof. G.A. Lawrence, Univ. of British Columbia, Vancouver, BC V6T 1Z4, Canada lawrence@civil.ubc.ca |
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0733-9372 |
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Apr.; Treatment of acid rock drainage in a meromictic mine pit lake; 2873922; United-States 38; Geobase |
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CBU @ c.wolke @ 17494 |
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72 |
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Ye, Z.H.; Whiting, S.N.; Qian, J.H.; Lytle, C.M.; Lin, Z.Q.; Terry, N. |
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Title |
Trace element removal from coal ash leachate by a 10-year-old constructed wetland |
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Journal Article |
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Year |
2001 |
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J. Environ. Qual. |
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30 |
Issue |
5 |
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1710-1719 |
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acid mine drainage; Alabama; ash; bioaccumulation; boron; cadmium; constructed wetlands; environmental analysis; environmental effects; iron; Jackson County Alabama; Juncus effusus; leachate; manganese; metals; pH; pollutants; pollution; remediation; soils; sulfur; trace elements; Typha latifolia; United States; vegetation; waste water; wetlands; Widows Creek; Widows Creek Steam Plant; zinc; Typha; Juncus 22, Environmental geology |
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This study investigated the ability of a 10-yr-old constructed wetland to treat metal-contaminated leachate emanating from a coal ash pile at the Widows Creek electric utility, Alabama (USA). The two vegetated cells, which were dominated by cattail (Typha latifolia L.) and soft rush (Juncus effusus L.), were very effective at removing Fe and Cd from the wastewater, but less efficient for Zn, S, B, and Mn. The concentrations were decreased by up to 99% for Fe, 91% for Cd, 63% for Zn, 61% for S, 58% for Mn, and 50% for B. Higher pH levels (>6) in standing water substantially improved the removing efficiency of the wetland for Mn only. The belowground tissues of both cattail and soft rush had high concentrations of all elements; only for Mn, however, did the concentration in the shoots exceed those in the belowground tissues. The concentrations of trace elements in fallen litter were higher than in the living shoots, but lower than in the belowground tissues. ne trace element accumulation in the plants accounted for less than 2.5% of the annual loading of each trace element into the wetland. The sediments were the primary sinks for the elements removed from the wastewater. Except for Mn, the concentrations of trace elements in the upper layer (0-5 cm) of the sediment profile tended to be higher than the lower layers (5-10 and 10-15 cm). We conclude that constructed wetlands are still able to efficiently remove metals in the long term (i.e., >10 yr after construction). |
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0047-2425 |
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Aug 1; Trace element removal from coal ash leachate by a 10-year-old constructed wetland; 2002-017274; References: 33; illus. incl. 2 tables United States (USA); file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/5703.pdf; GeoRef; English |
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CBU @ c.wolke @ 5703 |
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76 |
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Author |
Wolkersdorfer, C. |
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Title |
Mine water tracing |
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Journal Article |
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2002 |
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Geological Society Special Publication |
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Issue |
198 |
Pages |
47-60 |
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Groundwater problems and environmental effects Pollution and waste management non radioactive geomechanics abstracts: excavations (77 10 10) geological abstracts: environmental geology (72 14 2) flooding seepage abandoned mine tracer groundwater flow |
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This paper describes how tracer tests can be used in flooded underground mines to evaluate the hydrodynamic conditions or reliability of dams. Mine water tracer tests are conducted in order to evaluate the flow paths of seepage water, connections from the surface to the mine, and to support remediation plans for abandoned and flooded underground mines. There are only a few descriptions of successful tracer tests in the literature, and experience with mine water tracing is limited. Potential tracers are restricted due to the complicated chemical composition or low pH mine waters. A new injection and sampling method ('LydiA'-technique) overcomes some of the problems in mine water tracing. A successful tracer test from the Harz Mountains in Germany with Lycopodium clavatum, microspheres and sodium chloride is described, and the results of 29 mine water tracer tests indicate mean flow velocities of between 0.3 and 1.7 m min-1. |
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C. Wolkersdorfer, TU Bergakademie Freiberg, Lehrstuhl fur Hydrogeologie, Gustav-Zeuner-Strasse 12, Freiberg, Sachsen D-09599, Germany c.wolke@tu-freiberg.de |
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0305-8719 |
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Mine water tracing; 2463597; United-Kingdom 71; Geobase |
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CBU @ c.wolke @ 17528 |
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83 |
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Author |
Zinck, J.M.; Aube, B.C. |
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Optimization of lime treatment processes |
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Journal Article |
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Year |
2000 |
Publication |
CIM Bull. |
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93 |
Issue |
1043 |
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98-105 |
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Pollution and waste management non radioactive Groundwater problems and environmental effects geological abstracts: environmental geology (72 14 2) geomechanics abstracts: excavations (77 10 10) acid mine drainage buffering lime Canada |
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Lime neutralization technology is widely used in Canada for the treatment of acid mine drainage and other acidic effluents. In many locations, improvements to the lime neutralization process are necessary to achieve a maximum level of sludge densification and stability. Conventional lime neutralization technology effectively removes dissolved metals to below regulated limits. However, the metal hydroxide and gypsum sludge generated is voluminous and often contains less than 5% solids. Despite recent improvements in the lime neutralization technology, each year, more than 6 700 000 m3 of sludge are generated by treatment facilities operated by the Canadian mining industry. Because lime neutralization is still seen as the best available approach for some sites, sludge production and stability are expected to remain as issues in the near future. Several treatment parameters significantly impact operating costs, effluent quality, sludge production and the geochemical stability of the sludge. Studies conducted both at CANMET and NTC have shown that through minor modifications to the treatment process, plant operators can experience a reduction in operating costs, volume of sludge generated, metal release to the environment and liability. This paper discusses how modifications in plant operation and design can reduce treatment costs and liability associated with lime treatment. |
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J.M. Zinck, CANMET, Mining and Mineral Sciences Lab., Natural Resources Canada, Ottawa, Ont., Canada |
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0317-0926 |
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Optimization of lime treatment processes; 2291672; Canada 17; Geobase |
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CBU @ c.wolke @ 17537 |
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183 |
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