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Effect of power density of sonication in sono-photocatalytic oxidation of CBZ a) using low frequency (20 kHz) b) using high frequency (850 kHz) ultrasonic bath ([CBZ]0 = 10 ppm, Catalyst loading = 1 g/L, T = 298 K, without pH regulation, and LED light power = 93.4 W, continuous stirring of 200 rpm).
