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Attachment on mortar surfaces by cyanobacterium Gloeocapsa PCC73106 and sequestration of CO2 by microbially induced calcium carbonate
  • +1
  • Tingting Zhu,
  • George Arhonditsis,
  • Mohamed Merroun,
  • Maria Dittrich
Tingting Zhu
University of Toronto at Scarborough
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George Arhonditsis
University of Toronto at Scarborough
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Mohamed Merroun
University of Granada Faculty of Sciences
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Maria Dittrich
University of Toronto at Scarborough
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Abstract

Cyanobacterial carbonate precipitation induced by cells and extracellular polymeric substances (EPS) enhances the mortar durability. The percentage of cell/EPS attachment regulates the effectiveness of the mortar restoration. This study investigates the cell coverage on mortar and microbially induced carbonate precipitation. Statistical analysis of results from scanning electron and fluorescence microscopy show that the cell coverage was higher in the presence of UV-killed cells than living cells. Cells preferably attached to cement paste than sand grains, with a difference of one order of magnitude. The energy dispersive X-ray spectroscopy analyses and Raman mapping suggest cyanobacteria used atmospheric CO2 to precipitate carbonates.

Peer review status:POSTED

05 Sep 2020Submitted to Biotechnology and Bioengineering
14 Sep 2020Assigned to Editor
14 Sep 2020Submission Checks Completed