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Oxidative Degradation of Nonionic Surfactants with TiO 2 Photocatalyst in a Bubble Column Reactor
Author(s) -
Yoshikawa Nobuhiko,
Kimura Toshiaki,
Kawase Yoshinori
Publication year - 2003
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450810351
Subject(s) - photocatalysis , light intensity , degradation (telecommunications) , slurry , reaction rate constant , irradiation , oxidative phosphorylation , bubble , materials science , pulmonary surfactant , chemical engineering , intensity (physics) , chromatography , bubble column reactor , chemistry , photochemistry , kinetics , catalysis , organic chemistry , composite material , optics , telecommunications , biochemistry , physics , quantum mechanics , parallel computing , computer science , nuclear physics , gas bubble , engineering
The photocatalytic reaction for oxidative degradation of a nonionic surfactant, Tween 80 (polyoxyethylene sorbitan monooleate), was examined using TiO 2 photocatalyst powders. An external UV irradiation type slurry bubble column was used as a photoreactor. The rate constant of degradation was proportional to TiO 2 surface area and the square root of UV light intensity and independent on the initial concentration of Tween 80. A simple model for intensity distribution profiles of UV light supplied to the liquid in the photoreactor was developed to use in determining the degradation rate constant. The proposed model could simulate the experimental results satisfactorily.