Colloids and Surfaces A: Physicochemical and Engineering Aspects, cilt.726, 2025 (SCI-Expanded, Scopus)
Bulk micro-nanobubbles (BMNBs) have demonstrated potential for enhancing the flotation recovery of difficult-to-float fine mineral particles. While recent studies highlight the role of BMNB-induced particle aggregates in fine mineral particle flotation, systematic investigations into the aggregation behavior of fine hydrophobic minerals in aqueous solutions containing BMNBs remain limited. Therefore, this study addresses this gap by examining the effects of different salt ions (NaCl, CaCl2, and AlCl3) and solution pH on BMNBs properties. For this aim, BMNBs generated under various chemical environments were introduced into fine hydrophobic quartz slurries, and the resulting changes in particle size distribution (PSD) and microscopic morphology were analyzed. Fractal theory was then employed as a novel approach to evaluate the PSD and structural complexity of the formed aggregates. The results demonstrate that electrolyte type and solution pH significantly influence the size and concentration of BMNBs. In particular, changes in the properties of bulk microbubbles (BMBs) notably affect the PSD and fractal characteristics of the resulting aggregates. This study, which provides fundamental insights into the aggregation behavior of fine quartz in BMNB systems, paves the way for future research to design solution media for bubble-based separation technologies.