Breakage and Particle Size Redistribution in an Ultrasound‐Intensified Leaching Process

Abstract

The breakage and particle size redistributions in an ultrasound-intensified leaching process were explored experimentally and analyzed statistically. It was found that particle size distributions (PSDs) of this atomic crystal silica may be changed to a certain extent by ultrasound, but the width of PSD cannot be altered under the conditions considered. Chemical reactions played an important reciprocal causality to the breakage and the particle size redistributions, and the contribution was about a half on the mean particle size. The most severe breakup happened at the maximum volume percentage of PSD rather than in the region of the largest particle size end. The ability of conventional stirring to break the silica particles may be larger as expected when the same power was used. The morphology of the silica particles verified that the change before and after leaching is small.

Ultrasound‐Assisted Synthesis of Cu and Cu/Ni Nanoparticles on NaP Zeolite Support as Antibacterial Agents

“…In comparison to other works, a contact time of 188 min is suitable for NPs supported on NaP zeolite to be used as antibacterial agent. The relatively low T and C values of samples synthesized in this work can be attributed to the reduced particle size due to the application of ultrasonic in the synthesis process and also due to the solid support 59, 60.…”

Sonofragmentation: Effect of Ultrasound Frequency and Power on Particle Breakage

“…5 These observations are also in agreement with the literature as faster size reductions and smaller final particles at higher power levels are frequently reported. 7,8,20,23,45 In contrast, no significant effect of the power on particle breakage was observed for stable bubbles generated at 41 kHz. All data points are within the standard deviation of the experiments.…”

“…5,13,19 These effects impact the size of already formed particles by creating particle breakage (i.e., sonofragmentation). 5,8 Although the application of ultrasound during crystallization and precipitation processes is well studied, sonofragmentation remains relatively unexplored. 5,7,8,19 Most research in this topic is performed on inorganic solids in water.…”

“…5,7,8,19 Most research in this topic is performed on inorganic solids in water. 5,8,19 Raman and Abbas, for example, studied particle breakage of aluminum oxide particles suspended in water under sonication with a 24 kHz horn. 20 The effects of ultrasonic powers of 150−350 W on breakage characteristics were investigated.…”

Sonocrystallisation: Observations, theories and guidelines

“…Most research on sonofragmentation is performed on inorganic solids in water [35,57,85,116]. Raman and Abbas for example, studied particle breakage of aluminum oxide particles suspended in water under sonication with a 24 kHz probe [117].…”