title: A study of bactericidal effect and optimization of pathogenic bacteria using TiO2 photocatalyst.
abstract: The photocatalytic degradation of Salmonella choleraesuis subsp. and Vibrio parahaemolyticus in water by TiO2 catalysts was investigated in a batch reactor. After 30 min of irradiation with UV light in the presence of 1 mg/ml of TiO2, death ratio of S. choleraesuis subsp. and V. parahaemolyticus was 60% and 83%, respectively. And complete killing of the cells was achieved after 3 h of illumination in the presence of TiO2. We established the response surface methodology to investigate the effect of principal parameters on the pathogenic bacteria sterilization such as TiO2 concentration, pH and temperature. By applying response surface analysis to the bactericidal effect of S. almonella choleraesuis subsp. and V. parahaemolyticus, we found that the cell death ratio was influenced significantly by the first order term of TiO2 concentration.
authors: Department of Environmental Engineering, Chonnam National University, Gwangju 500-757, Korea.
authors: Tae-Young
authors: TY
authors: Kim
authors: Seung-Shik
authors: SS
authors: Park
authors: Seung-Jai
authors: SJ
authors: Kim
authors: Sung-Young
authors: SY
authors: Cho
mesh_terms: D000818:Animals; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002384:Catalysis; D006801:Humans; D066298:In Vitro Techniques; D036103:Nanotechnology; D058433:Photobioreactors; D055668:Photochemical Processes; D012475:Salmonella / Q000187:drug effects / Q000528:radiation effects; D014025:Titanium / Q000737:chemistry* / Q000494:pharmacology*; D014466:Ultraviolet Rays; D014736:Vibrio parahaemolyticus / Q000187:drug effects / Q000528:radiation effects
chemical_list: D000900:Anti-Bacterial Agents; C009495:titanium dioxide; D014025:Titanium