Dyestuffs are often present in industrial wastewaters and can consist of hazardous substances have a serious impact on the environment and personal health. Sonochemical degradation which combines destruction of the target compounds by free radical reaction and thermal cleavage is one of the recent advanced oxidation processes (AOP) and proven to be effective for removing low concentration organ...

We model the collapse of a bubble by taking into account all the energy forms involved (i.e., mechanical, thermal, chemical, and radiative) and compare the calculated radical yields with sonochemical data in H2O. Water decomposition plays a critical role in the energy balance, but trails equilibrium even in bubbles collapsing at subsonic speeds. Integration of the equation of bubble motion coup...

Ultrasonic breakdown of perfluorooctanoic acid and perfluorooctane sulfonic were evaluated at various ultrasonic frequency (575 kHz, 860 1140 kHz), pH (3–12), bulk water temperature (14.5–30 °C), gases (Helium, Nitrogen, Oxygen, Ozone, Argon). Contrary to the result reported in literature, we observed an increase rate kinetics PFOA PFOS decomposition air environment (i.e., without sparging any ...

background: carbaryl (1-naphthyl-n-methyl carbamate) is a chemical in the carbamate family used chiefly as an insecticide. it is a cholinesterase inhibitor and is toxic to humans and classified as a likely human carcinogen. in the present study, the degradation of the carbaryl pesticide was investigated in the laboratory synthetic samples of tap water, in the effect of sonolysis and photolysis ...

The present study concentrates on the synthesis of Au nanoparticles (AuNPs) using aqueous solution of Polyvinylpyrrolidone (PVP) and tetrachloroaurate by different methods as thermal, sonochemical and electrochemical reduction. The PVP has been used as a reducing agent and acts as a stabilizer for Au nano particles that obtained as principal product. In all synthesis procedures, the active radi...