Effect of Background Water Matrices on Pharmaceutical and Personal Care Product Removal by UV-LED/TiO2
| Autor: | Mark R. Servos, Norman Y. Zhou, Azar Fattahi, Robert Liang, Maricor J. Arlos, Leslie M. Bragg, Nivetha Srikanthan, Ivana Jaciw-Zurakowsky |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
TiO2 photocatalysis
02 engineering and technology TP1-1185 010501 environmental sciences synthetic surface water pharmaceuticals and personal care products 01 natural sciences Environmental impact of pharmaceuticals and personal care products Catalysis Physical and Theoretical Chemistry Effluent QD1-999 0105 earth and related environmental sciences Chemistry Chemical technology wastewater effluents 021001 nanoscience & nanotechnology Partition coefficient Wastewater Environmental chemistry Ultrapure water Photocatalysis Water treatment 0210 nano-technology UV-LED Surface water |
| Zdroj: | Catalysts, Vol 11, Iss 576, p 576 (2021) Catalysts Volume 11 Issue 5 |
| ISSN: | 2073-4344 |
| Popis: | In this study, we evaluated the effectiveness of UV-LED-irradiated TiO2 in removing 24 commonly detected PPCPs in two water matrices (municipal wastewater effluent and Suwannee River NOM–synthetic water) and compared their performance with that of ultrapure water. Relatively fast removal kinetics were observed for 29% and 12% of the PPCPs in ultrapure water and synthetic surface water, respectively (kapp of 1–2 min−1). However, they all remained recalcitrant to photocatalysis when using wastewater effluent as the background matrix (kapp < 0.1 min−1). We also observed that the pH-corrected octanol/water partition coefficient (log Dow) correlated well with PPCP degradation rate constants in ultrapure water, whereas molecular weight was strongly associated with the rate constants in both synthetic surface water and wastewater. The electrical energy per order (EEO) values calculated at the end of the experiments suggest that UV-LED/P25 can be an energy-efficient method for water treatment applications (2.96, 4.77, and 16.36 kW h m−3 in ultrapure water, synthetic surface water, and wastewater effluents, respectively). Although TiO2 photocatalysis is a promising approach in removing PPCPs, our results indicate that additional challenges need to be overcome for PPCPs in more complex water matrices, including an assessment of photocatalytic removal under different background water matrices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|