Comparative study on photocatalytic degradation of the antidepressant trazodone using (Co, Fe and Ru) doped titanate nanowires: Kinetics, transformation products and in silico toxicity assessment
| Autor: | M. Conceição Oliveira, Rodrigo A. Osawa, Olinda C. Monteiro, M. Helena Florêncio |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Materials science Light Health Toxicology and Mutagenesis 0208 environmental biotechnology Kinetics Nanowire 02 engineering and technology 010501 environmental sciences 01 natural sciences Nanomaterials Catalysis Metals Heavy Environmental Chemistry Biotransformation Environmental Restoration and Remediation 0105 earth and related environmental sciences Titanium Photolysis Nanowires Doping Public Health Environmental and Occupational Health General Medicine General Chemistry Pollution Titanate 020801 environmental engineering Chemical engineering Trazodone Photocatalysis Antidepressive Agents Second-Generation Environmental Pollutants Visible spectrum Mutagens |
| Zdroj: | Chemosphere. 259 |
| ISSN: | 1879-1298 |
| Popis: | Titanate nanomaterials have been outstanding in the removal of emerging contaminants by the photocatalysis process. These photocatalysts, when modified through techniques such as doping with metals, they have advantages over TiO2, especially in the region of visible light. In this work, the photocatalytic performance of four recent reported catalysts, pristine titanate nanowires, cobalt-doped titanate nanowires, iron-doped titanate nanowires and ruthenium-doped titanate nanowires, for the removal of the antidepressant trazodone under visible light radiation was compared. The iron-doped titanate nanowires presented the best catalytic activity by the catalyst surface area. Additionally, thirteen transformation products (TPs) were identified by high-resolution mass spectrometry and, to the best of our knowledge, nine of them have never been described in the literature. It was shown that for each catalyst different TPs were formed with distinct time profiles. Finally, toxicity assessment by computational methods showed that TPs were not readily biodegradable and they presented toxicity to aquatic organisms with mutagenic potential. These findings reinforce the importance of taking into consideration the TPs formed during the removal of pollutants since many of them may be toxic and can be produced during photocatalysis. |
| Databáze: | OpenAIRE |
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