School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, China.
Instituto de Física, Av. Manuel Nava 6, Zona Universitaria San Luis Potosí, San Luis Potosí, Mexico.
PLoS One. 2022 Aug 25;17(8):e0272841. doi: 10.1371/journal.pone.0272841. eCollection 2022.
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 × 109 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.
大肠杆菌作为一种水载细菌存在于煤炭浮选的循环水中，影响煤炭浮选的回收。为了研究大肠杆菌对煤炭浮选的影响，我们改变了煤炭浮选系统中大肠杆菌的浓度和 pH 值，发现大肠杆菌对煤炭浮选有不利影响。大肠杆菌的浓度与煤的回收率呈负相关。当大肠杆菌的浓度达到 5.0×109 个细胞/ml 时，煤炭浮选的回收率为 50.25%，而 pH 值的变化基本上不会影响大肠杆菌对煤炭浮选的不利影响。通过 Zeta 电位、傅里叶变换红外光谱、扫描电子显微镜和接触角测量研究了其机制。结果表明，大肠杆菌可以通过氢键吸附到煤表面，从而改变煤表面的疏水性，进而降低煤炭浮选的回收率。
