Akademik Veri Yönetim Sistemi
JOURNAL OF THE FACULTY OF ENGINEERING AND ARCHITECTURE OF GAZI UNIVERSITY, cilt.35, sa.3, ss.1257-1268, 2020 (SCI-Expanded)
The application of single frequency ultrasonic oxidation in water and wastewater treatment has been successfully used in recent years. By optimizing ultrasonic oxidation system parameters, it has effectively provided the treatment of pollutants in the solutions without requiring any additional chemicals. However, low frequency and high frequency ultrasonic sources are recently combined to obtain dual frequency ultrasonic systems and to increase the efficiency of ultrasonic oxidation systems. Two or more frequency systems increase the active radical species called as cavitational yield and involved in the oxidation and provide the degradation of target pollutants with higher efficiency. Dual frequency applications also facilitate the diffusion of active radical species into solution phase and thus more active radicals can be available for contaminants in the aqueous solutions. This study aims to determine the optimum operating parameters of Dual Frequency Ultrasonic System (DFUS) combined by simultaneous operation of two ultrasonic sources with a 20 kHz low frequency and a 640 kHz high frequency on the decolorization of Crystal Violet (CV) dye. The power optimization of the ultrasonic system was identifed by calorimetric method that calculated the real power dissipated to the system over all adjustable power output of both ultrasonic instruments.