Objective To investigate the effect of ultrasound coupled with photocatalysis and titanium dioxide (TiO2) on the degradation of oxytetracycline (OTC) in water.
Method Ultrasound (US), UV/TiO2 and US/UV/TiO2 three methods were used to degrade oxytetracycline in water samples, and the processed sample was detected by HPLC.
Results Oxytetracycline in water was degraded in combining ultrasound and photocatalysis reaction; the optimal condition for degradation was illuminating for 75 min, using an ultrasonic power of 200 W for 30 min; in an initial OTC concentration of 0.5 mg/L, an initial catalyst concentration of 10 mg/L, pH=10.8 and a nitrate concentration of 2 mg/L.
Conclusions The advantage of using the combination of ultrasound and photocatalytic reaction system to degrade the oxytetracycline in water was simple, environment-friendly, efficient and time-saving. This method could be used systematically in the degradation of oxytetracycline in wastewater.
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