Mechanism study of the impact of Escherichia coli on coal flotation

Escherichia coli as water-borne bacteria exists in the recirculation water of coal flotation and affects the recovery of coal flotation. In order to study the effect of Escherichia coli on coal flotation, we changed the concentration of Escherichia coli and pH in the coal flotation system and found...

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Bibliographic Details
Published in:PloS one 2022-08, Vol.17 (8), p.e0272841-e0272841
Main Authors: Li, Jianbo, Wang, Xizhuo, Meng, Delong, Xia, Ling, Song, Shaoxian, Arauz Lara, Bernardo José Luis
Format: Article
Language:English
Subjects:
Adsorption
Bacteria
Biology and Life Sciences
Coal
Coliforms
Contact angle
Dietary minerals
E coli
Earth Sciences
Ecology and Environmental Sciences
Electron microscopy
Engineering and Technology
Escherichia coli
Flotation
Fourier transforms
Hydrogen
Hydrogen bonding
Hydrophobicity
Infrared spectroscopy
Medicine and Health Sciences
Outdoor air quality
pH effects
Physical Sciences
Properties
Quartz
Recovery
Research and Analysis Methods
Rivers
Scanning electron microscopy
Side effects
Spectrum analysis
Sulfur content
Zeta potential
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Summary:Escherichia coli as water-borne bacteria exists in the recirculation water of coal flotation and affects the recovery of coal flotation. In order to study the effect of Escherichia coli on coal flotation, we changed the concentration of Escherichia coli and pH in the coal flotation system and found that Escherichia coli had an adverse effect on coal flotation. The concentration of Escherichia coli was negatively correlated with the recovery of coal. When the concentration of Escherichia coli reached 5.0 x 10.sup.9 cells/ml, the recovery of coal flotation was 50.25%, and the change of pH basically did not affect the adverse effect of Escherichia coli on coal flotation. The mechanism was studied through Zeta potential, Fourier transform infrared spectroscopy, Scanning electron microscopy and Contact angle measurements. The results revealed that Escherichia coli could be adsorbed to the coal surface by hydrogen bonding, which changed the hydrophobicity of the coal surface and then reduced the recovery of coal flotation.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0272841