Nanobubbles have recently attracted much interest for their practical use and potential applications in environmental issues. The pre-existence of deposited colloidal particles in porous media commonly occurs when nanobubbles applied to porous media interact with deposited colloidal particles. However, the current understanding of the effect of the interactions with pre-deposited colloidal particles on nanobubble transport in saturated porous media remains incomplete, and the effects are often overlooked. Therefore, we performed 1D column experiments with sequential injections of colloidal and nanobubble suspensions to study the effect of pre-deposited materials on the retention and release of colloids and nanobubbles in packed glass beads. In this study, we used resonant mass measurements to measure the number concentrations of colloids and nanobubbles during transport experiments for the first time to distinguish between coexisting solid colloidal particles and nanobubbles with different buoyancies in mixed effluent during transport. The nanobubble retention increased because of the pre-existence of deposited colloidal particles, indicating that the deposited colloidal particles act as additional deposition sites and physical obstacles for nanobubbles through physicochemical (including hydrophobic) interactions. This study also provides a future reference for the applicability of resonant mass measurement to cotransport experiments of different buoyant particles, including colloids, nanobubbles, and oil droplets.

纳米气泡最近因其在环境问题中的实际用途和潜在应用而引起了人们的极大兴趣。当应用于多孔介质的纳米气泡与沉积的胶体颗粒相互作用时，多孔介质中预先存在沉积的胶体颗粒通常会发生。然而，目前对与预沉积胶体颗粒的相互作用对饱和多孔介质中纳米气泡传输的影响的理解仍然不完整，而且这些影响经常被忽视。因此，我们进行了连续注射胶体和纳米气泡悬浮液的一维柱实验，以研究预沉积材料对填充玻璃珠中胶体和纳米气泡的保留和释放的影响。在这项研究中，运输过程中产生的废水。由于沉积胶体颗粒的预先存在，纳米气泡保留增加，表明沉积胶体颗粒通过物理化学（包括疏水性）相互作用作为纳米气泡的额外沉积位点和物理障碍。该研究还为共振质量测量在不同浮力粒子（包括胶体、纳米气泡和油滴）的协同传输实验中的适用性提供了未来参考。