Advanced

Bacterial destruction of mica during bioleaching of kaolin and quartz sand by Bacillus cereus

Styriakova, I; Styriak, I; Nandakumar, M P and Mattiasson, Bo LU (2003) In World Journal of Microbiology & Biotechnology 19(6). p.583-590
Abstract
Growth and metabolic activities of Bacillus cereus were found to cause the extraction of iron atoms from the octahedral position in mica in the kaolin sample (49%) and in the quartz sands sample (17%) after 3 months of bioleaching, while aluminium removal was only 5%. Mica destruction was detected in kaolin and quartz sands samples by X-ray diffraction analysis and also by i.r. adsorption spectroscopy in quartz sands samples. The structural changes obtained were confirmed by scanning electron microscopy (SEM) analysis. The SEM pictures show a different morphology in the boundary region of mica grains before and after bioleaching. Bacterial destruction effects were feeble in the interlayer sites and were specially directed to split planes,... (More)
Growth and metabolic activities of Bacillus cereus were found to cause the extraction of iron atoms from the octahedral position in mica in the kaolin sample (49%) and in the quartz sands sample (17%) after 3 months of bioleaching, while aluminium removal was only 5%. Mica destruction was detected in kaolin and quartz sands samples by X-ray diffraction analysis and also by i.r. adsorption spectroscopy in quartz sands samples. The structural changes obtained were confirmed by scanning electron microscopy (SEM) analysis. The SEM pictures show a different morphology in the boundary region of mica grains before and after bioleaching. Bacterial destruction effects were feeble in the interlayer sites and were specially directed to split planes, which are occupied by a number of bacterial cells. The biological destruction of mica with phengite composition after iron removal led to development of illite, which was detected by energy-dispersion microanalysis (EDS). Illite development caused also the enrichment of the kaolin sample by fine-grained fraction. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
World Journal of Microbiology & Biotechnology
volume
19
issue
6
pages
583 - 590
publisher
Springer
external identifiers
  • wos:000184717400005
  • scopus:0042914368
ISSN
0959-3993
DOI
10.1023/A:1025176210705
language
English
LU publication?
yes
id
67f68ffc-942a-4340-9969-3effc9c8f7a9 (old id 129285)
date added to LUP
2007-07-03 09:00:43
date last changed
2018-06-17 04:47:31
@article{67f68ffc-942a-4340-9969-3effc9c8f7a9,
  abstract     = {Growth and metabolic activities of Bacillus cereus were found to cause the extraction of iron atoms from the octahedral position in mica in the kaolin sample (49%) and in the quartz sands sample (17%) after 3 months of bioleaching, while aluminium removal was only 5%. Mica destruction was detected in kaolin and quartz sands samples by X-ray diffraction analysis and also by i.r. adsorption spectroscopy in quartz sands samples. The structural changes obtained were confirmed by scanning electron microscopy (SEM) analysis. The SEM pictures show a different morphology in the boundary region of mica grains before and after bioleaching. Bacterial destruction effects were feeble in the interlayer sites and were specially directed to split planes, which are occupied by a number of bacterial cells. The biological destruction of mica with phengite composition after iron removal led to development of illite, which was detected by energy-dispersion microanalysis (EDS). Illite development caused also the enrichment of the kaolin sample by fine-grained fraction.},
  author       = {Styriakova, I and Styriak, I and Nandakumar, M P and Mattiasson, Bo},
  issn         = {0959-3993},
  language     = {eng},
  number       = {6},
  pages        = {583--590},
  publisher    = {Springer},
  series       = {World Journal of Microbiology & Biotechnology},
  title        = {Bacterial destruction of mica during bioleaching of kaolin and quartz sand by Bacillus cereus},
  url          = {http://dx.doi.org/10.1023/A:1025176210705},
  volume       = {19},
  year         = {2003},
}