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Download fileSonolysis, photolysis, and sequential sonophotolysis for the degradation of 2,4,6-Trichlorophenol: the effect of solution concentration
journal contribution
posted on 2015-10-16, 08:38 authored by Collin G. Joseph, Gianluca Li-PumaGianluca Li-Puma, Awang Bono, Yun Hin Taufiq-Yap, Duduku KrishnaiahUltrasonic sound waves, ultraviolet-A irradiation and a combination of these two techniques were applied to a non-catalytic aqueous system containing 2,4,6-trichlorophenol (TCP) to study the effectiveness of sonolytic, photolytic and sonophotolytic oxidation processes in the degradation of TCP. The operating parameters for the horn-type sonicator and the UV-A lamp were kept constant along with the solution temperature but the TCP concentration was varied from 30 to 90 ppm. A first-order kinetic rate model was used to study the synergistic effect of the sonophotodegradation process. It was found that at a lower TCP concentration of 30 ppm, sonophotodegradation exhibited a synergistic effect but at a TCP concentration of 70 ppm and higher, sonophotodegradation resulted in an antagonistic effect. The synergistic effect was explained in terms of an increase in the ·OH radical formation by the combined process complemented by the photolysis of H2O2 formed by sonolysis. In contrast, the antagonistic effect was explained in terms of the combined effect of viscosity increase resulting in the reduction of the cavitation efficiency and degradation rate, and by considering the dynamics of bubble growth and implosion.
Funding
This research was supported by the Centre of Research & Innovation, University Malaysia Sabah (Grant No. FRG0115-TK-1=2007.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Chemical Engineering
Published in
CHEMICAL ENGINEERING COMMUNICATIONSVolume
202Issue
8Pages
1061 - 1068 (8)Citation
JOSEPH, C.G., 2015. Sonolysis, photolysis, and sequential sonophotolysis for the degradation of 2,4,6-Trichlorophenol: the effect of solution concentration. Chemical Engineering Communications, 202(8), pp. 1061-1068.Publisher
© Taylor and FrancisVersion
- AM (Accepted Manuscript)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2015Notes
This is an Pre-Publication Manuscript of an article published by Taylor & Francis in Chemical Engineering Communications on 10th Jul, 2014, available online: http://wwww.tandfonline.com/10.1080/00986445.2014.901221.”ISSN
0098-6445Publisher version
Language
- en