## 3 Results and Discussion
### Analysis of Water Retention in Anionic Fluorinated Solutions
#### 3.1.2 Analysis of Segmental Weight Loss Rate Variation of Anionic Fluorinated Solutions  
Water loss varied with different concentrations of FS-60 dust suppression solution over time. The overall water loss at 60 h increased with the concentration of the FS-60 solution. The concentrations of 0.01%, 0.02%, and 0.03% exhibited equivalent total water loss, as did the concentrations of 0.05%, 0.06%, 0.07%, and 0.3%. The solution with the highest water loss was at a concentration of 0.04%, whereas the solution with the lowest water loss was at a concentration of 0.07%. These variations in water loss can be attributed to the diverse interactions between the fluorocarbon molecules and water molecules at varying concentrations. The specific concentration of 0.07% exhibited the best water retention, signifying an optimal balance between the solution's properties and its water-retaining capability.  
The water loss patterns at different times varied among the different concentrations of FS-61 solution, as depicted in Figure 2(b). The different concentrations of the FS-61 solution exhibited varying patterns of water loss at different times, with no clear trend of water loss with increasing concentration over 60 h. The solution with the highest water loss was at 0.2% concentration, while the solution with the lowest water loss was at 0.3% concentration. The variations in water loss patterns indicate the complexity of interactions between fluorocarbon molecules, water molecules, and other solution components, which are not solely dependent on concentration. The optimal concentration for water retention in the FS-61 solution was found to be 0.3%.  
The water loss of the FS-63 solution varies at different concentrations and time periods. The concentration causing the highest water loss is 0.05%, resulting in approximately 15.3613 g of water loss, while the lowest concentration is 0.08%, with approximately 12.4645 g of water loss. The most concentrated solutions (except 0.05%) experience the highest water loss during the 24-36 h period. The concentration causing the highest water loss varies at different time periods: from 0 to 12 h, it is 0.05%; from 12 to 24 h, it is 0.01%; from 24 to 36 h, it is 0.01%; from 36 to 48 h, it is 0.01%; and from 48 to 60 h, it is 0.04%. The concentration of FS-63 solution that demonstrates the best water retention is 0.08%. The presence of perfluorooctanesulfonate carbamate acid in the FS-63 solution may influence the interaction between the anionic fluorocarbon molecules and water molecules. The specific chemical structure of perfluorooctanesulfonate carbamate acid may affect the solubility and solvation properties, leading to variations in water retention at different concentrations. The stability and volatility of the FS-63 solution at different concentrations can influence water loss. Concentrations that exhibit higher water loss may have higher volatility, potentially due to the presence of volatile components or the ease of evaporation of water from the solution. Based on the experimental results, the concentration of 0.08% demonstrates the  
Figure 2: Trend of coal dust weight with time under the action of non-ionic fluorinated solution.  
best water retention among the tested concentrations. This concentration achieves a more favorable balance of stability, volatility, and molecular interactions, resulting in reduced water loss.