Journal
ULTRASONICS SONOCHEMISTRY
Volume 18, Issue 5, Pages 1077-1081Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2011.03.014
Keywords
m-Xylene; Ultrasonic irradiation; Degradation
Categories
Funding
- Shenzhen Key Laboratory
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This study is to apply ultrasound to remove m-xylene, a volatile compound from aqueous solutions which causes environmental damage. High frequency ultrasound was used to investigate the effect of different operational parameters, such as m-xylene initial concentration, ultrasonic frequency and ultrasonic power. The degradation rate of m-xylene was increased with decreasing initial concentration of m-xylene and increasing frequency and power. Optimal conditions include 26.07 mg/L, 806.3 kHz and 70 +/- 1 W, in which MnO(2), Cu(2+), Fe(2+), and H(2)O(2) had little or no effect on the degradation. Moreover, the effect of radical scavengers such as Na(2)CO(3) and t-butyl was not obvious, which indicates that direct pyrolysis inside the collapsing bubbles has an important role in m-xylene ultrasonic removal. In addition, the degradation of m-xylene was observed to behave under pseudo-first-order kinetics with different experimental conditions tested in the present work. (C) 2011 Elsevier B.V. All rights reserved.
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