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- W2009221844 abstract "In order to treat aqueous effluents containing organic pollutants, several techniques can be considered depending on the organic compound concentration. Sonochemistry appears to be a promising solution to answer water remediation issue. In fact, when submitted into a liquid, ultrasound can induce the nucleation, growth, and violent collapse of vapor/gas filled bubbles. However, despite the extreme local conditions observed during acoustic cavitation, using ultrasound alone is efficient only at low concentration in organic pollutants. In the present study, 0.05 M oxalic acid degradation kinetics were followed at 40 °C under various conditions, in presence or not of Pt/TiO2 catalyst under silent conditions or ultrasound at 20 and 360 kHz. Experiments were achieved under controlled atmosphere and comparison between argon, Ar/O2 (20 vol% O2) and pure O2 conditions was performed. Oxidation rate increase of oxalic acid was measured under Ar/O2 atmosphere in presence of Pt/TiO2 catalyst due to strong dispersion effect of both low and high ultrasonic frequency and formation of chemically active species by sonolysis. High frequency ultrasonic irradiation under Ar/O2 atmosphere gives the highest kinetic increase compared to silent conditions with oxalic acid degradation rate around 13 μmol min−1 at 40 °C with 2 g L−1 of 3 wt% Pt on P25 TiO2 catalyst." @default.
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- W2009221844 date "2015-03-01" @default.
- W2009221844 modified "2023-10-13" @default.
- W2009221844 title "Sonocatalytic degradation of oxalic acid in the presence of oxygen and Pt/TiO2" @default.
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- W2009221844 doi "https://doi.org/10.1016/j.cattod.2014.07.040" @default.
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