Effect of Background Water Matrices on Pharmaceutical and Personal Care Product Removal by UV-LED/TiO2

In this study, we evaluated the effectiveness of UV-LED-irradiated TiO2 in removing 24 commonly detected PPCPs two water matrices (municipal wastewater effluent and Suwannee River NOM–synthetic water) compared their performance with that ultrapure water. Relatively fast removal kinetics were observed for 29% 12% synthetic surface water, respectively (kapp 1–2 min?1). However, they all remained recalcitrant to photocatalysis when using as background matrix < 0.1 We also pH-corrected octanol/water partition coefficient (log Dow) correlated well PPCP degradation rate constants whereas molecular weight was strongly associated both wastewater. The electrical energy per order (EEO) values calculated at end experiments suggest UV-LED/P25 can be an energy-efficient method treatment applications (2.96, 4.77, 16.36 kW h m?3 effluents, respectively). Although is a promising approach PPCPs, our results indicate additional challenges need overcome more complex matrices, including assessment photocatalytic under different matrices.