Efficient and stable LaFeO3 catalyst is prepared by a simple sol-gel method.
Ultrasound mediated Fe3+/persulfate Fenton-like system is developed.
The key rate determining factors for the sonocatalytic degradation are evaluated.
Synergism is obtained with Fe3+/ultrasound and persulfate/ultrasound systems.
Heterogeneous perovskite type LaFeO3 catalyst is extremely recyclable.