Abstract
In recent years, ozonation combined with ultrasound (US/O-3 process) has been actively researched as a promising method of advanced oxidation processes. Comparing with ozonation or ultrasound alone, it appears to be more effective and uses less energy, and it has the advantages of being nonselective, leading to no secondary pollution, and being particularly effective in removing persistent and biorefractory pollutants from water. This review describes the recent progresses in US/O-3 process for the degradation of persistent and biorefractory pollutants. Based on results, a global conceptual diagram for possible pathways of substrate degradation in US/O-3 system was given. Finally, some interesting trends and perspectives for this emerging area of research have been reported together with some highlighting needs to innovative.