Mechanism and kinetics of synergistic decopperization from copper anode slime by ultrasound and ozone

Intensifying separation of Pb and Sn from waste Pb-Sn alloy by ultrasound-assisted acid leaching: Selective dissolution and sonochemistry mechanism

“…In physical aspect, it has been demonstrated that the ultrasound cavitation bubbles undergo growth, expansion, and rupture, resulting in shock waves, micro-jets, and pressure changes in the leaching system [22] , [24] , [39] . These mechanical effects bring about more intense agitation and vibration than mechanical stirring, which can provide good dissolution kinetic conditions.…”

“…Research has demonstrated that ultrasound waves generate cavitation effect during propagation, leading to the collapse of cavitation bubbles and the creation of micro-scale turbulence, shock waves, and powerful liquid jets [22] , [23] . These micro-jets or shock waves directly impact the surface of solid particles, mechanically opening inclusions on particle surfaces and breaking down barriers that hinder metal leaching [24] . The ultrasound mechanical effects are also favorable to disperse particles for the preparation of uniform nanostructured materials [25] , [26] .…”

A comprehensive review on the ultrasound-enhanced leaching recovery of valuable metals: Applications, mechanisms and prospects

“…Symmetric collapse commonly generates micro-scale turbulence and shock waves, whereas asymmetric collapse occurs where the particles are very close to the collapsing bubbles, which may form a powerful liquid jet [47] . The produced microjets or shockwaves will directly act on the solid particles’ surface, which further induces the fragmentation of particles or opens the inclusions on the particle’s surface [48] .…”

Effective removal of As from a high arsenic-bearing ZnSO4 solution by ultrasonic enhanced ozonation in a one-pot method

“…However, O 3 has a very high oxidation reduction potential of 2.07 V, which is second only to F 2 and hydroxyl radical (•OH). Additionally, the ozone oxidation process does not introduce new impurities and features rapid oxidation speeds, leading to its great development prospects [25] , [26] , [27] . Otgon’s research indicates that the combination of ozone oxidation and iron precipitation technology can achieve excellent oxidation effects in low pH solutions, with arsenic removal rates surpassing 90% at a solution temperature of 90 °C [28] .…”