NHC Key Laboratory for Engineering Control of Dust Hazard, University of Science and Technology Beijing, Beijing 100083, China.
State Key Laboratory of Safety and Health for Metal Mine, Maanshan 243000, China.
Int J Environ Res Public Health. 2022 Dec 8;19(24):16472. doi: 10.3390/ijerph192416472.
Coal dust pollution poses a serious public health threat. This study aimed to investigate the feasibility of creating a coal dust suppressant using molasses, a byproduct of the sugar industry. We studied the effects of a molasses solution of varying concentrations (i.e., ranging from 0% (pure water) to 40%) on the moisture, bonding, and wind erosion properties of coal dust. Overall, the effectiveness of the molasses increased with their concentration, and it manifested itself in the following way: (1) the molasses improved the anti-evaporation ability of wet coal dust. For example, the evaporation mass of the coal dust wetted using a molasses solution decreased by 82.8%; (2) molasses effectively agglutinated coal dust; (3) molasses can effectively decrease the surface tension and increase the viscosity of the wetting solution. The surface tension of the molasses solution reached 41.37 mN/m and the viscosity increased to 6.79 mPa·s; (4) molasses can significantly suppress the wind erosion of deposited coal dust, with its wind erosion mass decreasing 99.1%; finally, (5) the effectiveness of molasses at suppressing coal dust was discussed at a molecular level. This study highlights the feasibility of a low-cost and environment-friendly dust suppressant in coal mines.
煤尘污染对公共健康构成严重威胁。本研究旨在探讨利用糖工业的副产物——糖蜜来制备抑尘剂的可行性。我们研究了不同浓度（即 0%（纯水）至 40%）的糖蜜溶液对煤尘水分、粘结和风力侵蚀特性的影响。总体而言，糖蜜的有效性随着浓度的增加而增加，具体表现为：（1）糖蜜提高了湿煤尘的抗蒸发能力。例如，用糖蜜溶液润湿的煤尘的蒸发质量减少了 82.8%；（2）糖蜜有效地团聚煤尘；（3）糖蜜可以有效降低润湿溶液的表面张力并增加其粘度。糖蜜溶液的表面张力达到 41.37 mN/m，粘度增加到 6.79 mPa·s；（4）糖蜜可以显著抑制沉积煤尘的风力侵蚀，其风力侵蚀质量减少 99.1%；最后，（5）从分子水平探讨了糖蜜抑制煤尘的效果。本研究突出了低成本、环保型抑尘剂在煤矿中的可行性。
