TiN electrode reactor for disinfection of drinking water

Tadashi Matsunaga, Mina Okochi, Minako Takahashi, Tsuruo Nakayama, Hitoshi Wake, Noriyuki Nakamura

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Titanium nitride (TiN) is a biocompatible material and has very low electrical resistance. Electrochemical control of pathogenic microbes derived from a drinking water distribution system was investigated using a TiN electrode. When a potential of 1.2 V vs saturated calomel electrode (SCE) was applied, the survival ratio of microorganisms decreased to below 40%. Changes in pH were not observed at 1.2 V vs SCE. Also, by applying -0.6 V vs SCE for 30 min, 69% of cells on the electrode surface were detached by the electrostatic repulsion. Therefore, an electrochemical disinfection reactor using a TiN mesh as the working electrode and the counter electrode was constructed. The drinking water containing mean viable cell concentration of 73 cells/ml was continuously passed through the reactor at a flow rate of 15 ml/min. The viable cell concentration in treated water decreased to below 5 cells/ml. When no potential was applied, cell concentration in treated water gradually increased after 200 h of reactor operation. In contrast, when alternating potentials of 1.2 and -0.6 V vs silver/silver chloride (Ag/AgCl) were applied to the TiN mesh working electrode, the viable cell concentration remained below 100 cells/ml during a 440 h operation. The reactor for drinking water disinfection incorporated with the TiN mesh electrode worked effectively by applying alternating potentials of 1.2 and -0.6 V vs Ag/AgCl. (C) 2000 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)3117-3122
Number of pages6
JournalWater Research
Volume34
Issue number12
DOIs
Publication statusPublished - 2000 Aug 15
Externally publishedYes

Fingerprint

Titanium nitride
Disinfection
Potable water
disinfection
titanium
electrode
drinking water
Electrodes
silver
Silver
reactor
Reactor operation
Water distribution systems
Acoustic impedance
Biomaterials
Microorganisms
Water
Electrostatics
microorganism
Cells

Keywords

  • Biocompatible material
  • Disinfection reactor
  • Drinking water
  • Titanium nitride

ASJC Scopus subject areas

  • Earth-Surface Processes

Cite this

Matsunaga, T., Okochi, M., Takahashi, M., Nakayama, T., Wake, H., & Nakamura, N. (2000). TiN electrode reactor for disinfection of drinking water. Water Research, 34(12), 3117-3122. https://doi.org/10.1016/S0043-1354(00)00066-X

TiN electrode reactor for disinfection of drinking water. / Matsunaga, Tadashi; Okochi, Mina; Takahashi, Minako; Nakayama, Tsuruo; Wake, Hitoshi; Nakamura, Noriyuki.

In: Water Research, Vol. 34, No. 12, 15.08.2000, p. 3117-3122.

Research output: Contribution to journalArticle

Matsunaga, T, Okochi, M, Takahashi, M, Nakayama, T, Wake, H & Nakamura, N 2000, 'TiN electrode reactor for disinfection of drinking water', Water Research, vol. 34, no. 12, pp. 3117-3122. https://doi.org/10.1016/S0043-1354(00)00066-X
Matsunaga T, Okochi M, Takahashi M, Nakayama T, Wake H, Nakamura N. TiN electrode reactor for disinfection of drinking water. Water Research. 2000 Aug 15;34(12):3117-3122. https://doi.org/10.1016/S0043-1354(00)00066-X
Matsunaga, Tadashi ; Okochi, Mina ; Takahashi, Minako ; Nakayama, Tsuruo ; Wake, Hitoshi ; Nakamura, Noriyuki. / TiN electrode reactor for disinfection of drinking water. In: Water Research. 2000 ; Vol. 34, No. 12. pp. 3117-3122.
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