TiO2-Mediated Photochemical Disinfection of Escherichia coli Using Optical Fibers

Tadashi Matsunaga*, Mina Okochi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

133 Citations (Scopus)


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
Issue number2
Publication statusPublished - 1995
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry


Dive into the research topics of 'TiO2-Mediated Photochemical Disinfection of Escherichia coli Using Optical Fibers'. Together they form a unique fingerprint.

Cite this