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Author |
Benner, S.G.; Blowes, D.W.; Ptacek, C.J. |
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Title |
A full-scale porous reactive wall for prevention of acid mine drainage |
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Journal Article |
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Year |
1997 |
Publication |
Ground Water Monitoring and Remediation |
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17 |
Issue |
4 |
Pages |
99-107 |
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acid mine drainage alkalinity bacteria Canada case studies concentration dissolved materials drainage Eastern Canada ground water mines observation wells Ontario permeability pH pollution porous materials recharge reduction remediation site exploration Sudbury District Ontario sulfate ion surface water waste disposal water pollution Groundwater quality Groundwater problems and environmental effects Pollution and waste management non radioactive geographical abstracts: physical geography hydrology (71 6 11) geomechanics abstracts: excavations (77 10 10) geological abstracts: environmental geology (72 14 2) groundwater protection permeable barrier acid mine drainage aquifer groundwater acid min drainage contamination permeable barrier groundwater protection permeable barrier acid mine drainage aquifer Canada, Ontario, Sudbury, Nickel Rim |
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Abstract |
The generation and release of acidic drainage containing high concentrations of dissolved metals from decommissioned mine wastes is an environmental problem of international scale. A potential solution to many acid drainage problem is the installation of permeable reactive walls into aquifers affected by drainage water derived from mine waste materials. A permeable reactive wall installed into an aquifer impacted by low-quality mine drainage waters was installed in August 1995 at the Nickel Rim mine site near Sudbury, Ontario. The reactive mixture, containing organic matter, was designed to promote bacterially mediated sulfate reduction and subsequent metal sulfide precipitation. The reactive wall is installed to an average depth of 12 feet (3.6 m) and is 49 feet (15 m) long perpendicular to ground water flow. The wall thickness (flow path length) is 13 feet (4 m). Initial results, collected nine months after installation, indicate that sulfate reduction and metal sulfide precipitation is occurring. Comparing water entering the wall to treated water existing the wall, sulfate concentrations decrease from 2400 to 4600 mg/L to 200 to 3600 mg/L; Fe concentration decrease from 250 to 1300 mg/L to 1.0 to 40 mg/L, pH increases from 5.8 to 7.0; and alkalinity (as CaCO<inf>3</inf>) increases from 0 to 50 mg/L to 600 to 2000 mg/L. The reactive wall has effectively removed the capacity of the ground water to generate acidity on discharge to the surface. Calculations based on comparison to previously run laboratory column experiments indicate that the reactive wall has potential to remain effective for at least 15 years. |
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Dr. S.G. Benner, Earth Sciences Department, University of Waterloo, Waterloo, Ont. N2L 3G1, Canada |
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1069-3629 |
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Review; A full-scale porous reactive wall for prevention of acid mine drainage; 0337197; United-States 46; file:///C:/Dokumente%20und%20Einstellungen/Stefan/Eigene%20Dateien/Artikel/10621.pdf; Geobase |
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CBU @ c.wolke @ 17555 |
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67 |
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Author |
Arango, I. |
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Title |
Evaluation of the beneficial effects of the acidophilic alga Euglena mutabilis on acid mine drainage systems |
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Year |
2002 |
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acid mine drainage atmospheric precipitation benthic taxa bioremediation dissolved materials dissolved oxygen electron microscopy data Euglena mutabilis Green Valley Mine ICP mass spectra Indiana iron mass spectra metals microorganisms mines oxygen pH photochemistry photosynthesis pollution rain remediation sediments soils spectra temperature United States Vigo County Indiana water 22, Environmental geology |
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Euglena mutabilis is an acidophilic, photosynthetic protozoan that forms benthic mats in acid mine drainage (AMD) channels. At the Green Valley mine, western Indiana, E. mutabilis resides in AMD measuring <4.2 pH, with high concentrations of dissolved constituents (up to 22.67 g/l). One of the main factors influencing E. mutabilis distribution is water temperature. The microbe forms thick (>1 mm), extensive mats during spring and fall, when water temperature is between 13 and 28 degrees C. During winter and summer, when temperatures are outside this range, benthic communities have a very patchy distribution and are restricted to areas protected from extreme temperature changes. E. mutabilis also responds to rapid increases in pH, which are associated with rainfall events. During these events pH can increase above 4.0, causing precipitation of Fe and Al oxy-hydroxides that cover the mats. The microbe responds by moving through the precipitates, due to phototaxis, and reestablishing the community at the sediment-water interface within 12 hours. The biological activities of E. mutabilis may have a beneficial effect on AMD systems by removing iron from effluent via oxygenic photosynthesis, and/or by internal sequestration. Photosynthesis by E. mutabilis contributes elevated concentrations of dissolved oxygen (DO), up to 17.25 mg/l in the field and up to 11.83 mg/l in the laboratory, driving oxidation and precipitation of reduced metal species, especially Fe (II), which are dissolved in the effluent. In addition, preliminary electro-microscopic and staining analyses of the reddish intracellular granules in E. mutabilis indicate that the granules contain iron, suggesting that E. mutabilis sequesters iron from AMD. Inductive coupled plasma analysis of iron concentration in AMD with and without E. mutabilis also shows that E. mutabilis accelerates the rate of Fe removal from the media. Whether iron removal is accelerated by internal sequestration of iron and/or by precipitation via oxygenic photosynthesis has yet to be determined. These biological activities may play an important role in the natural remediation of AMD systems. |
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Ph.D. thesis |
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Indiana State University, |
Place of Publication |
Terre Haute |
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Evaluation of the beneficial effects of the acidophilic alga Euglena mutabilis on acid mine drainage systems; GeoRef; English; References: 39; illus. incl. 3 tables |
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CBU @ c.wolke @ 16491 |
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476 |
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Stewart, B.R. |
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The influence of fly ash additions on acid mine drainage production from coarse coal refuse |
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1996 |
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acid mine drainage; acidic composition; alkalic composition; alkalinity; ash; coal; controls; copper; diffusion; dissolved materials; experimental studies; geologic hazards; hydraulic conductivity; iron; leachate; leaching; manganese; metals; organic residues; oxidation; oxygen; pH; pollutants; pollution; sedimentary rocks; soil treatment; soils; sorption; sulfate ion; waste disposal; water quality 22, Environmental geology |
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Ph.D. thesis |
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Virginia Polytechnic Institute and State University, |
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Blacksburg |
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The influence of fly ash additions on acid mine drainage production from coarse coal refuse; GeoRef; English |
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CBU @ c.wolke @ 6351 |
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230 |
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Fyson, A.; Nixdorf, B.; Steinberg, C.E.W. |
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Manipulation of the sediment-water interface of extremely acidic mining lakes with potatoes; laboratory studies with intact sediment cores Geochemical and microbial processes in sediments and at the sediment-water interface of acidic mining lakes |
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1998 |
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Water, Air and Soil Pollution |
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353-363 |
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acid mine drainage; acidification; ammonium ion; Brandenburg Germany; Central Europe; concentration; dissolved materials; ecology; Europe; eutrophication; ferric iron; Germany; iron; lacustrine environment; Lusatia; mass balance; metals; nitrate ion; pollutants; pollution; pore water; remediation; sediment-water interface; sediments; surface water; titration; transport 22, Environmental geology |
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108 |
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Peiffer, S. |
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Manipulation of the sediment-water interface of extremely acidic mining lakes with potatoes; laboratory studies with intact sediment cores Geochemical and microbial processes in sediments and at the sediment-water interface of acidic mining lakes; GeoRef; English; 1999-021233; Conference on Geochemical and microbial processes in sediments and at the sediment-water interface of acidic mining lakes, Bayreuth, Federal Republic of Germany, Feb. 1997 References: 17; illus. |
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CBU @ c.wolke @ 6102 |
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21 |
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Author |
Isaacson, A.E.; Jeffers, T.H. |
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Acid mine drainage remediation through applied water treatment systems Pollution prevention for process engineering |
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Book Chapter |
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1995 |
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acid mine drainage; acidification; aquifer vulnerability; aquifers; chemical reactions; discharge; dissolved materials; ground water; infiltration; ion exchange; leachate; metal ores; mining; mining geology; models; open-pit mining; pollutants; pollution; preventive measures; reclamation; remediation; soils; sulfides; surface mining; surface water; techniques; toxicity; uranium ores; waste water; water treatment 22, Environmental geology |
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Engineering Foundation |
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New York |
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Richardson, P.E.; Scheiner, B.J.; Lanzetta, F., Jr. |
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0939204533 |
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Acid mine drainage remediation through applied water treatment systems Pollution prevention for process engineering; GeoRef; English; 2000-063662; 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 illus. |
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CBU @ c.wolke @ 6450 |
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344 |
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