TY - JOUR
T1 - Enhancing sonochemical activity in aqueous media using power-modulated pulsed ultrasound
T2 - An initial study
AU - Casadonte, Dominick J.
AU - Flores, Megan
AU - Petrier, Christian
N1 - Funding Information:
DJC gratefully acknowledges financial assistance as a Fulbright Senior Scholar through the Council for the International Exchange of Scholars as administered by the United States Information Agency. This material is based in part upon work supported by the Texas Advanced Technology Program under Grant No. 003644-00778-2001. Acknowledgment is made to the Donors of The Petroleum Research Fund, administered by the American Chemical Society, for partial support of this research.
PY - 2005/2
Y1 - 2005/2
N2 - Relatively little is known about the effects of pulsed ultrasound on the facilitation of chemical reactivity. Previous studies have indicated that sonochemistry using pulses is generally less effective than continuous ultrasonic irradiation. However, the pulse trains employed were such that the peak power of the pulses was the same as the maximum power used in continuous irradiation. As a result, less acoustic energy was transmitted to the solutions over the same period of time. The effectiveness of ultrasound when the pulse is adjusted so that the same amount of acoustic energy is input compared to continuous irradiation over a given time has not been previously explored. In this study we have embarked on an examination of the efficacy of power-modulated pulsed (PMP) sonochemistry. Specifically, we have explored the effects of pulse type and pulse frequency on the oxidation of potassium iodide and the degradation of acid orange, a common industrial colorant. A rate increase by a factor of three was observed compared with continuous irradiation under conditions of equivalent acoustic input power.
AB - Relatively little is known about the effects of pulsed ultrasound on the facilitation of chemical reactivity. Previous studies have indicated that sonochemistry using pulses is generally less effective than continuous ultrasonic irradiation. However, the pulse trains employed were such that the peak power of the pulses was the same as the maximum power used in continuous irradiation. As a result, less acoustic energy was transmitted to the solutions over the same period of time. The effectiveness of ultrasound when the pulse is adjusted so that the same amount of acoustic energy is input compared to continuous irradiation over a given time has not been previously explored. In this study we have embarked on an examination of the efficacy of power-modulated pulsed (PMP) sonochemistry. Specifically, we have explored the effects of pulse type and pulse frequency on the oxidation of potassium iodide and the degradation of acid orange, a common industrial colorant. A rate increase by a factor of three was observed compared with continuous irradiation under conditions of equivalent acoustic input power.
KW - Acid orange
KW - Environmental remediation
KW - Pulsed sonochemistry
KW - Sonication
KW - Ultrasound
UR - http://www.scopus.com/inward/record.url?scp=5644265216&partnerID=8YFLogxK
U2 - 10.1016/j.ultsonch.2003.12.004
DO - 10.1016/j.ultsonch.2003.12.004
M3 - Article
C2 - 15491874
AN - SCOPUS:5644265216
VL - 12
SP - 147
EP - 152
JO - Ultrasonics Sonochemistry
JF - Ultrasonics Sonochemistry
SN - 1350-4177
IS - 3
ER -