期刊
MICROBIOLOGYOPEN
卷 10, 期 5, 页码 -出版社
WILEY
DOI: 10.1002/mbo3.1243
关键词
cyanobacterium Gloe; PCC 73106; extracellular polymeric substances; microbially induced carbonate precipitation; mortar durability
类别
资金
- Ontario Research Fund of Ministry of Research and Innovation [24591]
- National Science Engineering Research Council [354741]
- Canadian Foundation for Innovation [24591]
Cyanobacterial carbonate precipitation induced by cells and extracellular polymeric substances enhances mortar durability, with cells preferring to attach to cement paste rather than sand grains.
Cyanobacterial carbonate precipitation induced by cells and extracellular polymeric substances (EPS) enhances 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 shows that the cell coverage was higher in the presence of UV-killed cells than living cells. Cells are 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.
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