EFFICIENT DEGRADATION OF CLOFIBRIC ACID BY HETEROGENEOUS PHOTOCATALYTIC OXIDATION PROCESS
| Autor: | Lidia Favier, Andrei Ionut Simion, Lacramioara Rusu, Raluca Maria Hlihor, Mariana Liliana Pacala, Adrian Augustyniak |
|---|---|
| Přispěvatelé: | Jonchère, Laurent, Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), University of Bacău Vasile Alecsandri, 'Gheorghe Asachi' Technical University of Iasi (TUIASI), West Pomeranian University of Technology Szczecin, Romanian National Authority for Scientific Research and Innovation, CNCS/CCCDI - UEFISCDI [PN-III-P4-ID-PCE-2016-0683, 65/12.07.2017], Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
02 engineering and technology 010501 environmental sciences Management Monitoring Policy and Law Photochemistry 01 natural sciences Catalysis persistent micropollutant chemistry.chemical_compound Reaction rate constant [CHIM] Chemical Sciences [CHIM]Chemical Sciences mineralization nanosized catalysts Photodegradation 0105 earth and related environmental sciences degradation Pollutant Clofibric acid Mineralization (soil science) 021001 nanoscience & nanotechnology Pollution 6. Clean water Light intensity chemistry 13. Climate action kinetics Photocatalysis 0210 nano-technology photocatalysis |
| Zdroj: | Environmental Engineering and Management Journal Environmental Engineering and Management Journal, "Gheorghe Asachi" Technical University of Iaşi, 2019, 18 (8), pp.1683-1692 Environmental Engineering and Management Journal, 2019, 18 (8), pp.1683-1692 |
| ISSN: | 1582-9596 1843-3707 |
| Popis: | International audience; Emerging pollutants such as pharmaceutical active compounds were detected worldwide in different environmental compartments. Nowadays, multiple studies are focused on the investigation of their environmental fate, as well as to find new, efficient and sustainable removal technologies. Several studies demonstrated that heterogeneous photocatalysis is one of the most promising techniques used for water purification. Thus, the aim of our work was to evaluate the photodegradation efficiency of a refractory emergent compound, named clofibric acid, under UV light in aqueous solution. We report that photodegradation and mineralization efficiency are strongly dependent of the catalyst used. Results showed that the photodegradation was enhanced in the presence of TiO2 Aeroxide. The complete elimination was achieved for an initial pollutant concentration of 1.5 mg/L after 30 min of irradiation, the degradation rate following the pseudo-first order kinetics. It was also observed that the rate constant for the photodegradation process is affected by the concentration of catalyst. Process efficiency is enhanced by increasing the light intensity. The simultaneous reduction of pollutant concentration and dissolved organic carbon demonstrates the mineralization of the target molecule. Furthermore, it was demonstrated that the addition of nitrate to the system increases the pollutant degradation rate, while the carbonate reduces its removal, suggesting that this last ion can act as a hydroxyl scavenger. Preliminary phytotoxicity tests were also carried out and showed the capacity of the heterogeneous photocatalysis to reduce the toxicity of reaction intermediates generated during the photocatalytic reaction. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|