The feasibility of perfluorooctane sulfonate (PFOS)and perfluorooctanoate (PFOA)degradation by ultrasound irradiation was studied

and the effects of ultrasonic frequency

initial PFOS and PFOA concentration

initial pH

sorts of saturated gas

various organic and inorganic compounds coexisting with PFOS and PFOA

on the sonochemical decomposition rates were evaluated.The experimental results showed that PFOS and PFOA degradation followed the pseudo-first order kinetics in range of initial concentration 10—3650 μg·L-1.Complete sonolysis could be reached over a range of frequencies from 200 to 610 kHz and at 100 μg·L-1 of initial concentration.However

the degradation rate constants has an apparent maximum at 358 kHz

and at this frequency

the influences of initial concentration

initial pH and sorts of saturated gas on PFOS and PFOA degradation are great.Volatile aliphatic and aromatic organic components have effect on the degradation

while inorganic compound NaClO4 could accelerate the degradation rates.