Evaluation of ammonia-nitrogen removal efficiency from aqueous solutions by ultrasonic irradiation in short sonication periods

Ultrasonics Sonochemistry
Emrah Ozturk, Nazire Bal

Abstract

In this study, mechanisms and efficiency of ammonia-nitrogen removal from aqueous solutions by ultrasonic irradiation were investigated. Depending on the factors affecting the sonication (initial concentration, initial pH, ultrasonic power density and sonication period), sonication tests were carried out and ammonium-nitrogen removal efficiency by ultrasonic irradiation was determined. In these experiments, ammonia-nitrogen removal efficiency was achieved in the range of 8-64%. In short sonication periods, the best ammonia-nitrogen removal efficiency was achieved at pH 8.2-11. Lower ammonia-nitrogen removal efficiency was observed in high initial ammonia-nitrogen concentration of solutions. It was observed that high initial ammonia-nitrogen concentrations may led to decreased ammonia-nitrogen removal efficiency however quantity of ammonia-nitrogen removal was higher. Because high initial concentration had a negative impact on the sonochemical reactions the heat of cavitation bubbles was reduced. Ammonia-nitrogen removal efficiency was increased with ultrasonic density and sonication period. This study showed that effective ammonia-nitrogen removal could be achieved by the ultrasonic irradiation in short sonication periods (as 6...Continue Reading

References

Jun 5, 2007·Journal of Hazardous Materials·David R StapletonMaria Papadaki
Sep 18, 2007·Journal of Hazardous Materials·Dogan KaradagAhmet Demir
Jun 5, 2008·Ultrasonics Sonochemistry·Songlin WangMeijun Tao
Feb 10, 2009·The Science of the Total Environment·Pankaj Chowdhury, T Viraraghavan
Mar 24, 2009·Journal of Hazardous Materials·Li LinXiaohua Lu
Mar 27, 2009·Ultrasonics Sonochemistry·Thirugnanasambandam Sivasankar, Vijayanand S Moholkar
Jul 7, 2009·Journal of Hazardous Materials·Yian Zheng, Aiqin Wang

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