Mechanism analysis of hydroxypropyl guar gum degradation in fracture flowback fluid by homogeneous sono-Fenton process

Combining ozone and ultrasound technology to remove S2− in Bayer liquor

“…4 (a) shows the decreases in sulfur concentration with the increase of ultrasonic power. The S 2− concentration decreases from 1.46 g/L to 0.05 g/L with the ultrasonic power increases to 100 W. The cavitation effect is enhanced by the increase of ultrasonic power, meanwhile, more free radicals are released from the cavitation bubble collapse to provide an oxidizing atmosphere and conducive to the redox reaction in the system [30] . Moreover, US, as an external field strengthening method, can be used to enhances the turbulent of the solution by transient cavitation.…”