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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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Book Whole |
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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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Abstract |
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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Call Number |
CBU @ c.wolke @ 16491 |
Serial |
476 |
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Author |
Herbert, R.B., Jr.; Benner, S.G.; Blowes, D.W. |
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Title |
Reactive barrier treatment of groundwater contaminated by acid mine drainage; sulphur accumulation and sulphide formation |
Type |
Book Chapter |
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Year |
1998 |
Publication |
Groundwater Quality: Remediation and Protection |
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451-457 |
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Keywords |
acid mine drainage Canada chemical analysis contaminant plumes Eastern Canada ground water hydraulic conductivity hydrolysis Nickel Rim Mine Ontario pH pollution porosity pyrrhotite remediation sample preparation Sudbury Basin sulfides sulfur tailings water pollution 22, Environmental geology |
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Abstract |
A permeable reactive barrier was installed in August 1995 at the Nickel Rim Mine near Sudbury, Ontario, Canada, for the passive remediation of groundwater contaminated with acid mine drainage. The reactive component of the barrier consists of a mixture of municipal and leaf compost and wood chips: the organic material promotes bacterially-mediated sulphate reduction. Hydrogen sulphide, a product of sulphate reduction, may then complex with aqueous ferrous iron and precipitate as iron sulphide. This study presents the solid phase sulphur chemistry of the reactive wall after two years of operation, and discusses the formation and accumulation of iron sulphide minerals in the reactive material. The results from the solid-phase chemical analysis of core samples indicate that there is an accumulation of reduced inorganic sulphur in the reactive wall, with levels reaching 190 mu mol g (super -1) (dry weight) by July 1997. |
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IAHS-AISH Publication, vol.250 |
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Herbert, M.; Kovar, K. |
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1901502554 |
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Reactive barrier treatment of groundwater contaminated by acid mine drainage; sulphur accumulation and sulphide formation; GeoRef; English; 1999-065115; GQ 98 conference, Tubingen, Federal Republic of Germany, Sept. 21-24, 1998 References: 15; illus. |
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CBU @ c.wolke @ 16621 |
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65 |
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Author |
Wiseman, I. |
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Title |
Constructed wetlands for minewater treatment |
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RPT |
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Year |
2002 |
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125 |
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Sewage Ecology Constructed wetlands — Wales Mineral industries — Waste disposal Mine water Water quality management — Wales Pelenna minewaters Water pollution & oil pollution Hydrology & limnology |
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Environment Agency |
Place of Publication |
Bristol, England |
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Constructed wetlands for minewater treatment; Opac |
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CBU @ c.wolke @ 7122 |
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207 |
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Author |
Isaacson, A.E.; Jeffers, T.H. |
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Title |
Acid mine drainage remediation through applied water treatment systems Pollution prevention for process engineering |
Type |
Book Chapter |
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Year |
1995 |
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Keywords |
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 |
Place of Publication |
New York |
Editor |
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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Call Number |
CBU @ c.wolke @ 6450 |
Serial |
344 |
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Author |
Gusek, J.J.; Wildeman, T.R. |
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Title |
New developments in passive treatment of acid rock drainage Pollution prevention for process engineering |
Type |
Book Chapter |
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Year |
1995 |
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acid mine drainage; aerobic environment; alkalinity; bioaccumulation; bioremediation; constructed wetlands; decontamination; disposal barriers; geomembranes; heavy metals; hydroxides; nutrients; oxides; pH; physical properties; pollution; reclamation; remediation; soils; tailings; techniques; toxic materials; vegetation; waste disposal; water quality; wetlands 22, Environmental geology |
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Publisher |
Engineering Foundation |
Place of Publication |
New York |
Editor |
Richardson, P.E.; Scheiner, B.J.; Lanzetta, F., Jr. |
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0939204533 |
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New developments in passive treatment of acid rock drainage Pollution prevention for process engineering; GeoRef; English; 2000-063657; 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 References: 3; illus. incl. 1 table |
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Call Number |
CBU @ c.wolke @ 6447 |
Serial |
363 |
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