TiO2-Mediated Photochemical Disinfection of Escherichia coli Using Optical Fibers

Tadashi Matsunaga, Mina Okochi

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Abstract

We have constructed a system for photochemical disinfection of bacteria using a suspension of titanium dioxide and diffuse-light emitting optical fibers (DLEOFs). Disinfection of bacteria at high Ti02 concentrations was light-limited when conventional optical fibers were used to supply light to the cell suspension. However, when using DLEOFs that emit light laterally from their surface, light distribution throughout a suspension of Escherichia coliwas greatly improved even in the presence of high TiO2 concentrations. A 4-fold increase in photochemical disinfection was obtained at high TiO2 concentrations using DLEOFs rather than conventional optical fibers for light supply. The use of DLEOFs should provide a generally applicable method for photodisinfection of water supplies.

Original languageEnglish
Pages (from-to)501-505
Number of pages5
JournalEnvironmental Science and Technology
Volume29
Issue number2
DOIs
Publication statusPublished - 1995
Externally publishedYes

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ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

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