Journal
ULTRASONICS SONOCHEMISTRY
Volume 12, Issue 5, Pages 395-400Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2004.04.003
Keywords
sonolysis; photocatalysis; sonophotocatalysis; MTBE degradation; energy consumption
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The degradation of methyl tert-butyl ether (MTBE) in water was kinetically investigated in a O-2/Ar 80:20 atmosphere employing either sonolysis at 20 kHz, or photocatalysis on TiO2 (with 315 nm < lambda(irr) < 400 nm), or simultaneous sonolysis and photocatalysis (i.e. sonophotocatalysis), as degradation techniques. In all investigated conditions, MTBE concentration decreased according to a first order rate law; under ultrasound the degradation rate was stirring-dependent. The time profile of the reaction intermediates gave information on the reaction paths prevailing under the different experimental conditions. The energy consumption of the employed degradation techniques was also evaluated, which might be decisive for their practical application. (C) 2004 Elsevier B.V. All rights reserved.
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