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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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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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CBU @ c.wolke @ 16491 |
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476 |
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Author |
Anonymous |
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Book Whole |
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1998 |
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118 pp |
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abandoned mines; acid mine drainage; aquifer vulnerability; aquifers; arsenic; bibliography; bioremediation; chemical properties; chemical waste; chromium; constructed wetlands; decontamination; disposal barriers; ground water; grouting; industrial waste; metals; microorganisms; mines; mobility; phytoremediation; pollutants; pollution; programs; reclamation; remediation; sludge; soil treatment; soils; solvents; sorption; Superfund; surface water; tailings; toxic materials; waste disposal; waste disposal sites; water quality; wetlands 22, Environmental geology |
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Society for Mining, Metallurgy, and Exploration |
Place of Publication |
Littleton |
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Remediation of historical mine sites; technical summaries and bibliography |
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0873351622 |
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Remediation of historical mine sites; technical summaries and bibliography; 1998-031431; GeoRef; English |
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CBU @ c.wolke @ 6164 |
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11 |
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Author |
Rees, B. |
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Title |
An overview of passive mine water treatment in Europe |
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Journal Article |
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Year |
2005 |
Publication |
Mine Water Env. |
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24 |
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1 |
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26-28 |
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abandoned mines; Europe; ground water; mines; mining; pollutants; pollution; protection; surface water; water pollution; water quality; water treatment 22, Environmental geology |
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1025-9112 |
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An overview of passive mine water treatment in Europe; 2007-023994; 1 table Federal Republic of Germany (DEU); GeoRef; English |
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CBU @ c.wolke @ 5411 |
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19 |
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Author |
Coulton, R.H.; Williams, K.P. |
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Title |
Active treatment of mine water; a European perspective |
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Journal Article |
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2005 |
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Mine Water Env. |
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24 |
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1 |
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23-26 |
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abandoned mines; Europe; ground water; mines; mining; pollutants; pollution; protection; surface water; water pollution; water quality; water treatment 22, Environmental geology |
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1025-9112 |
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Active treatment of mine water; a European perspective; 2007-023995; illus. incl. 3 tables Federal Republic of Germany (DEU); GeoRef; English |
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CBU @ c.wolke @ 5412 |
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20 |
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Author |
Banks, S.B.; Banks, D. |
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Title |
Abandoned mines drainage; impact assessment and mitigation of discharges from coal mines in the UK |
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Book Chapter |
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Year |
2001 |
Publication |
Geoenvironmental engineering Engineering Geology |
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31-37 |
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abandoned mines coal mines cost discharge drainage England environmental effects Europe feasibility studies Great Britain mine drainage mines mitigation pollution remediation Scotland United Kingdom Western Europe 22, Environmental geology |
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Abstract |
The UK has a legacy of pollution caused by discharges from abandoned coal mines, with the potential for further pollution by new discharges as groundwaters continue to rebound to their natural levels. In 1995, the Coal Authority initiated a scoping study of 30 gravity discharges from abandoned coal mines in England and Scotland. Mining information, geological information and water quality data were collated and interpreted in order to allow a preliminary assessment of the source and nature of each of the discharges. An assessment of the potential for remediation was made on the basis of the feasibility and relative costs of alternative remediation measures. Environmental impacts of the discharges and of the proposed remediation schemes were also assessed. The results, together with previous Coal Authority studies of discharges in Wales, were used by the Coal Authority, in collaboration with the former National Rivers Authority and the former Forth and Clyde River Purification Boards, to rank discharge sites in order of priority for remediation. |
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60 |
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Yong, R.N.; Thomas, H.R. |
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Abandoned mines drainage; impact assessment and mitigation of discharges from coal mines in the UK; GeoRef; English; 2001-052748; British Geotechnical Society, second conference on Geoenvironmental engineering, London, United Kingdom, Sept. 1999 References: 12; illus. incl. 2 tables |
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CBU @ c.wolke @ 16515 |
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31 |
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