Simultaneous and Sequential Photosonolysis of TCE and PCE
Publication: Journal of Environmental Engineering
Volume 132, Issue 1
Abstract
Aqueous solutions of trichloroethylene (TCE) and tetrachloroethylene (PCE) were treated in a flow-through reactor equipped with ultrasound and ultraviolet light sources. The reactor was operated as sonolysis (US), photolysis (UV), and simultaneous photosonolysis (UV/US) reactors; then as US, UV, and sequential UV/US reactors with the installation of a partition in the reactor. The reactor without the partition was simulated by using one continuously stirred-tank-reactor (1-CSTR) model, and the reactor with the partition was simulated by using the sequential CSTR model. Through model calibration, the decomposition rate constants and reactor efficiencies for the removal of TCE and PCE were evaluated. The results suggest that the combined effect of UV and US on the decomposition of TCE and PCE is synergistic in both the simultaneous and sequential UV/US modes, that the rate constants of sonolysis and photolysis are greater with the sequential combination than with the simultaneous combination, and that overall efficiency is higher for the reactor with the partition than for the one without it.
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Acknowledgments
This work was supported by the Lockheed Martin Idaho Technologies Company University Research Consortium. Lockheed Martin Idaho Technologies Company was the managing and operations contractor for the U.S. Department of Energy, under DOE Idaho Operations Office Contract No. DE-AC07-94ID13223. We thank Teri Peterson for her insight on the statistical methods and appropriate nonlinear regression approaches.
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Published In
Journal of Environmental Engineering
Volume 132 • Issue 1 • January 2006
Pages: 32 - 41
Copyright
© 2005 ASCE.
History
Received: Jun 7, 2004
Accepted: May 17, 2005
Published online: Jan 1, 2006
Published in print: Jan 2006
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