Photocatalytic degradation of nonionic surfactants with immobilized TiO2 in an airlift reactor

  • Kimura T
  • Yoshikawa N
  • Matsumura N
 et al. 
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The photocatalytic degradation of a nonionic surfactant, Sanonic SS-90
(polyoxyethylene alkyl ether) which is one of polyoxyethylene nonionic
surfactants, in water has been investigated using immobilized titanium
dioxide (TiO2) photocatalyst. An external UV irradiation type airlift
reactor was used as a photoreactor. The effects of initial nonionic
surfactant concentration, intensity of UV light, and concentrations of
TiO2 photocatalyst on degradation rate of Sanonic SS-90 were examined.
The photocatalytic decomposition of Sanonic SS-90 was assumed to be
approximately described by the Langmuir-Hinshelwood kinetics. The rate
constant of photocatalytic degradation was found to be proportional to
TiO2 surface area and the square root of UV light intensity and
independent on the initial concentration of Sarionic SS-90. The
evaluated average UV light intensity in the airlift photoreactor was
used to determine the rate constants in the Langmuir-Hinshelwood
kinetics. It was found that the kinetic model for the degradation by
immobilized TiO2 photocatalyst can simulate the experimental results

Author-supplied keywords

  • Airlift photoreactor
  • Immobilized TiO2photocatalyst
  • Langmuir-Hinshelwood kinetics
  • Nonionic surfactant

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  • Toshiaki Kimura

  • Nobuhiko Yoshikawa

  • Nobuhiko Matsumura

  • Yoshinori Kawase

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