ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
An experimental campaign was conducted for monitoring the formation of hydrocarbongaseous compounds during bioleaching of copper sulphide ores with mesophilic microorganisms.Three different mineral samples were used: a pyrite concentrate, a chalcopyrite concentrate and acopper sulphide ore rock from El Teniente mine containing 1 % copper. Mineral samples werebioleached in 250 ml shake flasks containing 100 ml of basal medium inoculated either with a purestrain of Acidithiobacillus ferrooxidans or a natural bacteria consortium obtained from the acidleaching of El Teniente ore in columns. Each sealed system shake flask was fed with a flow ofsynthetic air and the exit stream was passed through a column containing an adsorbent material andnext through a water trap as to avoid back air contamination from the environment. Compoundspresent in the adsorbent material after 90 days of bioleaching were analysed using a gaschromatography mass spectrometry technique with a procedure that detects 162 differenthydrocarbon gaseous compounds (SGH). Results showed that the bacterial communities in coppersulphide bioleaching results in the formation of some hydrocarbon gaseous compounds, mainlyvarious types of methyl benzene and branched alkanes. The formation of these organic compounds islikely to be related to the presence of heterothrofic microorganisms present in the natural populations
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.20-21.139.pdf
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