3. Results and discussion
3.1. Effect of type and source of TiO2
The reduction trend of TiO2 (T1, T2 and T3) samples using single
wash 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 T3
has exhibited highest log reduction (5.78) followed by T2 (2.59) and
T1 (1.81), respectively. This indicates that the type and source of
TiO2 has played an important role on the log reduction. In