alexa Sonochemical and sonophotocatalytic degradation of malachite green: the effect of carbon tetrachloride on reaction rates.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): BejaranoPrez NJ, SurezHerrera MF

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Abstract A comparative study between the sonolytic, photocatalytic and sonophotocatalytic oxidation processes of aqueous solutions of malachite green was carried out in the presence of carbon tetrachloride, under a low power ultrasonic field (<15 W) and using titanium dioxide as a photocatalyst. The effect of a number of parameters such as ultrasonic intensity, TiO2 crystalline structure and the presence of CCl4 were studied using an inexpensive reactor. Enhanced rates of sonolytic degradation of malachite green in the presence of CCl4 were demonstrated. On the other hand, the simultaneous use of sonolysis and photocatalysis in the presence of CCl4 does not improve the degradation rate of malachite green in comparison with the one obtained using only sonolysis, but it makes possible a faster oxidative degradation of some reaction intermediaries. Finally, in air saturated solutions both processes, the sonolytic and the photocatalytic one, follow a first-order rate law. This article was published in Ultrason Sonochem and referenced in Journal of Microbial & Biochemical Technology

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