Kerabchi Nassim

• Doctor of Engineering process
• PhD Student at Badji Moktar-Annaba University

Sonolysis and ozonation are two advanced oxidation processes (AOPs) that are actually well documented and their mechanisms are well established. Recently, the combination of these two processes, that is sonolytic ozonation [ultrasound (US)/O3], has been successfully applied to improve the degradation of several water contaminants, as compared to ea...

Acoustic cavitation is the central event of the sonochemical process, which is one of the most recent advanced oxidation processes for water treatment. Even though the liquid compressibility effect on acoustic cavitation has already been investigated by certain studies, their results are still limited to the radial dynamics and the thermodynamic be...

Acoustic cavitation is the central event of water sonolysis, which generates several radical and nonradical species such as H•, •OH, H2, and H2O2. In addition to these species, production of HNO2 and HNO3 was demonstrated in N2-containing aqueous solutions. These species were usually liberated as nitrite and nitrate ions. The mechanism by which NO2...

Injecting of soluble gases in water under sonication is an important tool for improving the efficiency of the sonochemical treatment of water. Among several used gases, nitrous oxide (N2O) has shown a special effect. Instead other gases, dissolving pure N2O in solutions suppresses all sonochemical effects. However, when low amount of this gas is in...

The mechanism by which seawater salts affect the sonochemical activity is until now under debate. In this work, a theoretical approach based on single bubble sonochemistry model has been adopted for examining the effect of seawater salinity on the acoustic generation of free radicals. The model combines the fluctuation dynamics of single acoustic b...

Even through the liquid compressibility effect on acoustic cavitation has already been investigated by several authors, their results, however, are still limited to the radial dynamics and the thermodynamic behavior of the gas inside the bubble. In this computational study, the effect of liquid compressibility was investigated on both the bubble dy...

Understanding the effect of the liquid depth (z) on the acoustic generation of hydrogen is highly required for designing large-scale sonoreactors for hydrogen production because acoustic cavitation is the central event that initiates sonochemical reactions. In this paper, we present a computational analysis of the liquid-depth effect on the generat...

Acoustic cavitation concentrates and releases a very large amount of energy in localized areas, which can be used for many physical and chemical processes. Even though acoustic cavitation has been studied widely for decades in lab-scale sonoreactors, only few studies have been devoted to characterize this event in big-scale sonoreactors, where the...

Liquid depth (z) is one of the most critical factors that influence the sonochemical activity, particularly for large-scale sonoreactors. This factor is one of the missing links between lab-scale sonoreactors and industrial-scale sonoreactors. Herein, computer simulations of depth effect (z = 0–8 m) on the acoustic generation of free radicals were...