- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Application of the photocatalytic reaction of TiO2 to disinfection and the killing of Escherichia coli bacteria | ||
| Iraqi National Journal Of Chemistry | ||
| Article 1, Volume 0, Issue 35, 2014, Pages 480-488 | ||
| Authors | ||
| Nada Y.Fairooz; Rajaa A.AL-Anbaeki; a G.Gassim; Fatima Al-Zahra | ||
| Abstract | ||
| Abstract Photocatalytic disinfection reaction under UV- visible light in presence of oxygen and Titanium dioxide (TiO2) in aqueous solution has been investigated .This method is effective for killing Escherichia -coli bacteria in water. TiO2 semiconductor exhibits strong bacterial activity .The aim of this research is to design a new photobioreactor and its application to sterilize the water from E-coli bacteria . Primary experiments have been done to determined the optimum conditions which lead to high killing efficiency of E-coli bacteria in aqueous solution . The results showed that the bacterial effect of TiO2 under UV-visible light irradiation on E-coli bacterial suspension was much higher than without using TiO2 .The photocatalytic reactions were carried out with various TiO2 concentrations. The highest photocatalytic E-coli photokilling rate was obtained at 0.5 mg/ml TiO2 concentration ,which is equal to 3.25 x 10-2 CFUs /sec .This rate was increased to 5.8 x10-2 CFUs /sec when 10 ppm of hydrogen peroxide was add to E-coli aqueous solution under UV- visible light in presence of oxygen and ideal concentration of TiO2 (0.5mg/ml). The mechanism of TiO2 illumination to produce oxidizing species and the effect of these species on the bacterial activity in aqueous solution has been suggested. | ||
|
Statistics Article View: 32 PDF Download: 21 |
||