Effect of Sodium Oleate on the Adsorption Morphology and Mechanism of Nanobubbles on the Mica Surface

Abstract

Nanobubbles promote the flotation of fine-grained minerals. In the associated mechanism, the aggregation of fine particles is first promoted, which increases the probability of collision between particles and bubbles. However, the interaction between nanobubbles and mineral particles is often neglected, especially when the surface properties of the nanobubbles are modified by flotation collectors. In this study, the interaction mechanism between nanobubbles and the mica surface is investigated by nanoparticle tracking analysis, zeta potential measurement, and atomic force microscopy. The results reveal that the hydrophobic group of sodium oleate points toward the inside of the nanobubble and the hydrophilic group faces outward after the interaction of sodium oleate molecules and nanobubbles. A surfactant micelle with nanobubbles as the core is formed, thus considerably reducing the concentration of sodium oleate to form micelles. The adsorption of the modified nanobubbles on the mineral surface is carried out by the specific adsorption of the exposed hydrophilic group and the mineral surface. This adsorption method is superior to the hydrophobic interaction between the nanobubbles and the hydrophobic mineral surface. Further, the nanobubbles are highly selective for the activation sites on the mineral surface in the adsorption mode. This study will help understand the interaction between nanobubbles and collectors to further apply nanobubbles to treat fine-grained mineral particles.

Simulation Research on the Effectiveness of a Multiagent Mine Safety Supervision System and Its Verification

“…e company organization is mapped to the CMSS model, according to the project process design and equipment configuration. e miner agent category includes 450 staff members, and the supervision agent category includes 60 staff members [8,44]. According to the density of employees in the mining enterprise, the number of Netlogo grids is 100 × 100 for a total of 10,000 grids.…”

Analysis of the Application Potential of Coffee Oil as an Ilmenite Flotation Collector

“…It is known that the adsorption of anions on the mineral surface will change the charge distribution on the mineral surface. The adsorption characteristics of the anionic collector on the mineral surface are revealed by studying the distribution of the surface charge of the mineral under different conditions [31][32][33]. Figure 4 shows the relationship between the zeta potential of the ilmenite surface and the pH value with coffee oil or MOH before and after adsorption on the ilmenite surface.…”

Dissolution kinetics of tellurium from gold concentrate during alkaline sulphide leaching

“…A tellurium extraction of 58.56% was obtained for the 57.58 μm size fraction after leaching for 180 minutes, while 75.77% was obtained for the 17.77 μm size fraction. This could be caused by the increase in specific surface area with the decrease in particle size (Xiao et al, 2019;Zheng and Chen, 2014a), so that the mass transfer process is enhanced. In addition, solid particles are also activated during grinding and the occluded tellurium is exposed, enhancing contact with the lixiviant.…”