| Bioleaching of ultramafic tailings by acidithiobacillus spp. for CO2 sequestration. | |
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MedLine Citation:
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PMID: 19950896 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Bioleaching experiments using various acid-generating substances, i.e., metal sulfides and elemental sulfur, were conducted to demonstrate the accelerated dissolution of chrysotile tailings collected from an asbestos mine near Clinton Creek, Yukon, Canada. Columns, possessing an acid-generating substance colonized with Acidithiobacillus sp., produced leachates with magnesium concentrations that were an order of magnitude greater than mine site waters or control column leachates. In addition, chrysotile tailings were efficient at neutralizing acidity, which resulted in the immobilization of metals (Fe, Cu, Zn) associated with the metal sulfide mine tailings that were used to generate acid. This suggests that tailings from acid mine drainage environments may be utilized to enhance chrysotile dissolution without polluting "downstream" ecosystems. These results demonstrate that the addition of an acid-generating substance in conjunction with a microbial catalyst can significantly enhance the release of magnesium ions, which are then available for the precipitation of carbonate minerals. This process, as part of a carbon dioxide sequestration program, has implications for reducing net greenhouse gas emissions in the mining industry. |
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Authors:
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Ian M Power; Gregory M Dipple; Gordon Southam |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 44 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2009-12-30 Completed Date: 2010-03-25 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 456-62 Citation Subset: IM |
Affiliation:
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Department of Earth Sciences, The University of Western Ontario, London, Ontario N6A 5B7, Canada. ipower@uwo.ca |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acidithiobacillus
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metabolism* Carbon Dioxide / metabolism* Metals / metabolism* Microscopy, Electron, Scanning Water Pollutants, Chemical / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Metals; 0/Water Pollutants, Chemical; 124-38-9/Carbon Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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