Short review: Current trends and future challenges in the application of sono-Fenton oxidation for wastewater treatment
Sustain. Environ. Res., 22(5), 271-278 (2012)
Hydroxyl radicals, intermediate, mineralization, sono-Fenton oxidation, ultrasound
Currently, ultrasonic process has been widely used for research purposes, mostly in synthetic solutions spiked with one or several contaminants. Practical application of the ultrasonic process for wastewater treatment is often limited by its low mineralization efficiency on the target compound, formation of intermediate product(s), setup cost(s), and noise in operation. However, the combination of ultrasound and Fenton reagent, i.e., sono-Fenton oxidation, has great potential for rapid destruction of refractory organics in a short span of time through the mechanisms of thermal destruction and removal of free hydroxyl radicals. This review addresses the theory and the effects of operational parameters involved in sono-Fenton oxidation on various target pollutants. Finally, challenges in the application of sono-Fenton oxidation for wastewater treatment are critically assessed for future research.