Journal of Sustainable Metallurgy, cilt.10, sa.4, ss.1933-1958, 2024 (SCI-Expanded)
With the studies carried out in recent years, the processes of dissolving ores are being accelerated considerably by using various techniques. One of the techniques used for this purpose is also “Ultrasound energy.” Ultrasound produces its mechanical and chemical effects through the phenomenon of cavitation bubbles, which are generated in a liquid when a large negative pressure is applied to it. Ultrasound irradiation not only produces many microcracks on the solid surface through the cavitation effect, but also increases the diffusion rate of soluble species in the liquid phase. Ultrasound has attracted a great attention in hydrometallurgy due to its special effects such as strong penetrating ability, intense sound energy, long transmission distance in liquids, and easy acquisition. Thus, ultrasound irradiation on dissolution of ores has been successfully applied recently due to the advantages of the cavitation phenomenon, which enhances the efficiency of leaching processes. This review summarizes the cavitation phenomenon and the effect of ultrasound power on the leaching process in metal recovery. In addition, the current review addresses that the use of ultrasound due to its known cavitation effects as compared to conventional mixing methods shortens leaching time, the leaching rate is also increased with the increase in the ultrasound power and thereby increases leaching efficiency, and has become a popular method in the hydrometallurgical studies.