| Records |
| Author |
Arango, I. |
| Title |
Evaluation of the beneficial effects of the acidophilic alga Euglena mutabilis on acid mine drainage systems |
Type |
Book Whole |
| Year |
2002 |
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| Keywords |
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 |
| 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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Thesis |
Ph.D. thesis |
| Publisher |
Indiana State University, |
Place of Publication |
Terre Haute |
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| Notes |
Evaluation of the beneficial effects of the acidophilic alga Euglena mutabilis on acid mine drainage systems; GeoRef; English; References: 39; illus. incl. 3 tables |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 16491 |
Serial |
476 |
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| Author |
Anonymous; Unten, L.; Wildeman, T.R.; Gusek, J.J. |
| Title |
Passive treatment for contaminants in mine waters Effluent treatment in the mining industry |
Type |
Book Chapter |
| Year |
1998 |
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Abbreviated Journal |
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acid mine drainage; alkalinity; biodegradation; chemical reactions; coal mines; constructed wetlands; controls; degradation; heavy metals; ions; kinetics; metal ores; mines; mitigation; oxidation; pH; pollution; polymetallic ores; remediation; solubility; sulfate ion; sulfides; waste disposal; wetlands 22, Environmental geology |
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University of Concepcion |
Place of Publication |
Concepcion |
Editor |
Castro, S.H.; Vergara, F.; Sanchez, M.A. |
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University of Concepcion, D. of M.E.C.C. |
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ISBN |
9562271560 |
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| Notes |
Passive treatment for contaminants in mine waters Effluent treatment in the mining industry; GeoRef; English; 2002-047084; References: 59; illus. incl. 3 tables |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 6215 |
Serial |
477 |
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| Author |
Amacher, M.C.; Brown, R.W.; Kotuby-Amacher, J.; Willis, A. |
| Title |
Adding sodium hydroxide to study metal removal in a stream affected by acid mine drainage |
Type |
Journal Article |
| Year |
1993 |
Publication |
Research Paper, US Department of Agriculture, Forest Service |
Abbreviated Journal |
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| Volume |
465 |
Issue |
17 |
Pages |
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| Keywords |
pH stream mine drainage remediation zinc copper sodium hydroxide USa Montana Beartooth Mountains Fisher Creek 3 Geology |
| Abstract |
Fisher Creek, a stream affected by acid mine drainage in the Beartooth Mountains of Montana, was studied to determine the extent to which copper (Cu) and zinc (Zn) would be removed from stream water when pH was increased by a pulse of sodium hydroxide (NaOH). Although the pH adjustment study indicated that precipitated Fe(OH) “SUB 3” (am) could rapidly remove Cu and Zn from a stream affected by acid mine drainage, the pH should be maintained in an optimal range (7 to 8.5) to maximize removal by adsorption. -from Authors |
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Adding sodium hydroxide to study metal removal in a stream affected by acid mine drainage; (1022908); 94k-02459; Using Smart Source Parsing INT- pp; Geobase |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 17566 |
Serial |
484 |
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| Author |
Al-Abed, S.; Allen, D.; Bates, E.; Reisman, D. |
| Title |
Lime treatment lagoons technology for treating acid mine drainage from two mining sites |
Type |
Journal Article |
| Year |
2002 |
Publication |
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Issue |
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Pages |
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acid mine drainage; case studies; Copper Mine; drainage; geochemistry; heavy metals; hydrochemistry; Leviathan Mine; mining; Nevada; pH; pollutants; pollution; precipitation; remediation; runoff; surface water; Tennessee; United States; waste lagoons; water treatment 22 Environmental geology; 02B Hydrochemistry |
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Hardrock mining 2002; issues shaping the industry |
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| Notes |
2007-046170; Hardrock mining 2002; issues shaping the industry, Westminster, CO, United States, May 7-9, 2002 U. S. Environmental Protection Agency, Office of Research and Development, Washington, DC, United States; GeoRef; English |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 5621 |
Serial |
487 |
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| Author |
Ahmed, S.M. |
| Title |
Surface chemical methods of forming hardpan in pyrrhotite tailings and prevention of the acid mine drainage |
Type |
Journal Article |
| Year |
1994 |
Publication |
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Issue |
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Pages |
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acid mine drainage; chemical composition; experimental studies; mines; oxidation; pollution; pyrite; pyrrhotite; remediation; sulfides; tailings; waste disposal; weathering rinds 22, Environmental geology |
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Special Publication - United States. Bureau of Mines, Report: BUMINES-SP-06B-94 |
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Proceedings of the International land reclamation and mine drainage conference and Third international conference on The abatement of acidic drainage; Volume 2 of 4; Mine drainage |
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2007-045205; International land reclamation and mine drainage conference; International conference on The abatement of acidic drainage, Pittsburgh, PA, United States, April 24-29, 1994 References: 4; illus. incl. 1 table; GeoRef; English |
Approved |
no |
| Call Number |
CBU @ c.wolke @ 6593 |
Serial |
488 |
| Permanent link to this record |
