CAJ | 학술논문

为了考察生物表面活性剂替代化学表面活性剂调控浮选气泡的能力，采用高速摄影技术，对比研究了茶皂素、鼠李糖脂和曲拉通3种表面活性剂溶液中单个气泡的变形、终速度与运动轨迹，以及气泡群的尺寸分布特征。结果表明，类似于化学表面活性剂，生物表面活性剂对单气泡的浮升运动和气泡群的尺寸分布均有重要的影响。少量的茶皂素就可以有效地抑制气泡变形、降低气泡终速度、增强气泡的稳定性、减小气泡群的特征尺寸和增大气泡群的比表面积。另外，生物表面活性剂对气泡的影响取决于生物表面活性剂的种类和浓度。茶皂素的调控效果强于鼠李糖脂。单从对气泡动力学行为的影响效果来看，生物表面活性剂可能成为化学表面活性剂的替代品或升级换代品。
위료고찰생물표면활성제체대화학표면활성제조공부선기포적능력，채용고속섭영기술，대비연구료다조소、서리당지화곡랍통3충표면활성제용액중단개기포적변형、종속도여운동궤적，이급기포군적척촌분포특정。결과표명，유사우화학표면활성제，생물표면활성제대단기포적부승운동화기포군적척촌분포균유중요적영향。소량적다조소취가이유효지억제기포변형、강저기포종속도、증강기포적은정성、감소기포군적특정척촌화증대기포군적비표면적。령외，생물표면활성제대기포적영향취결우생물표면활성제적충류화농도。다조소적조공효과강우서리당지。단종대기포동역학행위적영향효과래간，생물표면활성제가능성위화학표면활성제적체대품혹승급환대품。
In order to examine using the biosurfactants as potential alternatives of chemical synthetic surfactants to control bubble behavior in flotation process, the high-speed photographic method was employed to measure the motion of the single bubble and size distribution of bubble swarms in the presence of biosurfactants in a laboratory scale flotation column. Deionized water, rhamnolipid, tea saponin and Triton X-100 were used for making various surfactant solutions. Bubble trajectory, dimensions, velocity and distribution were then determined from the recorded frames by using the image analysis software. The results show that similar to chemical synthetic surfactants, the addition of biosurfactants has significant effects on bubble motion and size distribution. It was found that, due to the Marangoni effect, the addition of a small amount of tea saponin can dampen bubble deformation, slow down bubble terminal velocity, stabilize bubble trajectory, reduce bubble size and increase the specific surface area of bubble swarms. In addition, it was also found that the effect of biosurfactant on bubble behavior depends on their type and concentration. The controlling effect of tea saponin, is fairly close to that of Triton X-100, and is stronger than that of rhamnolipid. The results obtained in the present study suggest that some biosurfactants can be used to replace the chemical surfactants for controlling bubble behavior in flotation column.