Bio-deposition of a calcium carbonate layer on degraded limestone by Bacillus species

Dick, Jan, De Windt, Wim, De Graef, Bernard, Saveyn, Hans, Van der Meeren, Paul, De Belie, Nele and Verstraete, William (2006) Bio-deposition of a calcium carbonate layer on degraded limestone by Bacillus species. Biodegradation, 17 4: 357-367. doi:10.1007/s10532-005-9006-x


Author Dick, Jan
De Windt, Wim
De Graef, Bernard
Saveyn, Hans
Van der Meeren, Paul
De Belie, Nele
Verstraete, William
Title Bio-deposition of a calcium carbonate layer on degraded limestone by Bacillus species
Formatted title
Bio-deposition of a calcium carbonate layer on degraded limestone by Bacillus species
Journal name Biodegradation   Check publisher's open access policy
ISSN 0923-9820
1572-9729
Publication date 2006-08
Sub-type Article (original research)
DOI 10.1007/s10532-005-9006-x
Volume 17
Issue 4
Start page 357
End page 367
Total pages 11
Place of publication Dordrecht, Netherlands
Publisher Springer
Language eng
Subject 039901 Environmental Chemistry (incl. Atmospheric Chemistry)
Formatted abstract
To obtain a restoring and protective calcite layer on degraded limestone, five different strains of the Bacillus sphaericus group and one strain of Bacillus lentus were tested for their ureolytic driven calcium carbonate precipitation. Although all the Bacillus strains were capable of depositing calcium carbonate, differences occurred in the amount of precipitated calcium carbonate on agar plate colonies. Seven parameters involved in the process were examined: calcite deposition on limestone cubes, pH increase, urea degrading capacity, extracellular polymeric substances (EPS)-production, biofilm formation, ζ-potential and deposition of dense crystal layers. The strain selection for optimal deposition of a dense CaCO3 layer on limestone, was based on decrease in water absorption rate by treated limestone. Not all of the bacterial strains were effective in the restoration of deteriorated Euville limestone. The best calcite precipitating strains were characterised by high ureolytic efficiency, homogeneous calcite deposition on limestone cubes and a very negative ζ-potential.
Keyword Biofilm
Biomineralisation
CaCO3
Urea degrading activity
ζ-potential
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
Advanced Water Management Centre Publications
 
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