A novel and highly effective UV-TiO2 photocatalytic reactor was developed for killing microorganisms, including Escherichia coli. Among tested four types of TiO2-immobilized photocatalytic supporters (glass bead, muscovite bead, alginate bead, and TiO2 thin film coated quartz tube), the muscovite bead had a 99.9% percent bactericidal activity within 5 min along with permanent longevity. Adding air bubbles or H2O2 (<50 mg 1-1) to the sample solution significantly enhanced the killing activity in that 100% percent of bacterial cells were killed within 3 min.
Bibliographical noteFunding Information:
This work was supported by the special grants research program from Ministry of Agriculture (Project No. 299023-3) (2001), and ERC grant from Ministry of Science and Technology and KOSEF (2001) in Korea.
All Science Journal Classification (ASJC) codes
- Applied Microbiology and Biotechnology