Micro-molar concentrations of aqueous 17-β-oestradiol were 98% destroyed in 3.5h by photocatalysis over the titanium dioxide powder immobilised on Ti-6Al-4V alloy. The concentration of oestradiol was determined by HPLC with fluorescence detection. The degradation kinetics were fitted to a Langmuir–Hinshelwood model with k(S)=4.4×10−2μmoldm−3min−1 and K(S)=0.347dm3μmol−1. The pseudo-first-order rate constant (1.57×10−2min−1) was in line with the 50% degradation time of 40min. The apparent quantum yield per electron was φe′ =0.41%. The effect of pH on the initial rate of degradation was similar to that reported for phenol.
- Titanium dioxide
- Water treatment
Coleman, H. M., Eggins, B. R., Byrne, J. A., Palmer, F. L., & King, E. (1999). Photocatalytic degradation of 17-β-oestradiol on immobilised TiO2. Applied Catalysis B: Environmental, 24(1), L1-L5. https://doi.org/10.1016/S0926-3373(99)00091-0