“…17,18 The sonocatalytic degradation process is one of the mechanical degradation techniques which has many advantages such as energy saving, avoidance of secondary pollution formation, cost-effectiveness and high efficiency. [19][20][21] The sonolysis treatment mechanism of the polluted water was carried out in three steps by an ultrasonic-cavitation effect, which refers to the bubble formation, expansion and collapse by ultrasonic wave in water. 22,23 When the cavitation-bubble collapses, high temperature and pressure will be generated.…”