Ionic microbubbles are miniature gas bubbles of <100 μm in diameter, which are surrounded by charged ions. Stability of ionic microbubble is an important parameter which is used to analyse the efficiency of microbubble for fine particle separation. This article reports the experimental observations of stability of ionic microbubbles in presence of micro and nano particles. The effects of concentration of surfactant, temperature, and pH on the stability of the ionic microbubble are studied. A model has been developed to interpret the stability of the ionic microbubble based on drainage kinetics. Bubble size and its holdup, affecting the stability of the suspension are also enunciated in the present article. The study may be useful for fine particle separation in batch and continuous mode with the help of ionic microbubble.

离子微气泡是直径小于100μm的微型气泡，被带电的离子包围。离子微泡的稳定性是一个重要参数，用于分析微泡分离细粒的效率。本文报道了在存在微米和纳米粒子的情况下离子微泡的稳定性的实验观察。研究了表面活性剂浓度，温度和pH对离子微泡稳定性的影响。已经开发了一种模型，用于基于排水动力学来解释离子微泡的稳定性。在本文中还阐明了气泡大小及其滞留影响了悬浮液的稳定性。该研究对于借助离子微泡的间歇和连续模式的细小颗粒分离可能是有用的。