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Acidophiles. The acid test. The acidity of water is expressed by a measure called pH that has a scale that typically ranges from 0 to 14. Pure water is neutral pH, that is, pH 7.
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Sulfur containing molecules are air oxidized to sulfuric acid. Certain bacteria, called acidophiles, promote the oxidation of iron sulfides in the presence of oxygen and water. 2FeS 2(s) + 7O 2(g) + 2H 2 O (l) 2Fe 2+ (aq) + 4SO 4 2-(aq) + 4H + (aq) Read more in the pdf file on acid mine drainage from the Environmental Mining Council of British ...
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An anaerobic environment is characterized by the lack of free oxygen (O 2 ), in contrast with an aerobic environment that is rich in oxygen. Although oxygen-free, this type of environment may possess atomic oxygen bound in nitrite, sulfites and nitrates. When these compounds are present, there can be harmful byproducts like hydrogen sulfide ...
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Control of these acidophiles and their harnessing for industrial biotechnology shows their effect need not be entirely negative. [1] The use of acidophilic organisms in mining is a new technique for extracting trace metals through bioleaching, and offers solutions for the phenomenon of acid mine drainage in mining spoils.
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In our initial phylogenetic characterisation of Wheal Jane acidophiles, four of the predominant (from plate counts) iron-oxidising microbes (WJ2, WJ4, WJ5 and WJ18; see Table 2) were purified by repeated single colony isolation on FeTo plates before growth in a liquid medium containing 5 mM ferrous sulfate, 5 mM sodium thiosulfate and 0.025% TSB (initial pH ∼3.8).
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Geochemical niches of Iron-oxidizing acidophiles in acidic coal mine drainage. Daniel S. Jones, Courtney Kohl, Christen Grettenberger, Lance N. Larson, William D. Burgos, Jennifer L. Macalady, 2015, Applied and Environmental Microbiology on p. 1242-1250 Molecular characterization of core lipids from halophilic archaea grown under different ...
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