The reduction trend of TiO2 (T1, T2 and T3) samples using singlewash of bacterial cells, 20 mL bacteria-NP suspension and 2 mW/cm2 UVA light intensity over a 3 h photocatalytic disinfection
treatment was shown in Fig. 2.
Under tested conditions, Sample T3has exhibited highest log reduction (5.78) followed by T2 (2.59) andT1 (1.81), respectively. This indicates that the type and source ofTiO2 has played an important role on the log reduction. In