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Photocatalytic Reduction of Nitrates and Combined Photodegradation with Ammonium
| Content Provider | MDPI |
|---|---|
| Author | Conte, Francesco Pellegatta, Veronica Michele, Alessandro Di Ramis, Gianguido Rossetti, Ilenia |
| Copyright Year | 2022 |
| Description | Bare titania and metal-promoted $TiO_{2}$ catalysts were employed in the treatment of nitrates, which are ubiquitous pollutants of wastewater. The results show that the process can be carried out under visible light (from a white light LED lamp) and, in the best case, 23.5% conversion of nitrate was obtained over 4 h with full selectivity towards $N_{2}$ by employing 0.1 mol% $Ag/TiO_{2}$ prepared by flame spray pyrolysis. Moreover, the performance was worse when testing the same catalysts with tap water (11.3% conversion), due to the more complex composition of the matrix. Finally, it was found that photoreduction of nitrate can be effectively performed in combination with photo-oxidation of ammonium without loss in the activity, opening up the possibility of treating highly polluted wastewater with a single process. The latter treatment employs the two contaminants simultaneously as electron and holes scavengers, with very good selectivity, in a completely new process that we may call Photo-Selective Catalytic Reduction (Photo-SCR). |
| Starting Page | 321 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12030321 |
| Journal | Catalysts |
| Issue Number | 3 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-03-11 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Environmental Engineering Environmental Sciences Wastewater Treatment Nitrogen-containing Pollutants Nitrate Photoreduction Scr Photocatalysis Titania |
| Content Type | Text |
| Resource Type | Article |
