Graphite as catalyst for UV-A LED assisted catalytic wet peroxide oxidation of ibuprofen and diclofenac
Ibuprofen (IBU) and Diclofenac (DCF) are two of the most common non-steroidal anti-inflammatory drugs used worldwide. Their occurrence in natural streams, as contaminants of emerging concern, evidences the inefficiency of conventional wastewater treatment plants for their removal. The photocatalytic...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Universidad Autónoma de Madrid |
| Repositorio: | Biblos-e Archivo. Repositorio Institucional de la UAM |
| Idioma: | inglés |
| OAI Identifier: | oai:repositorio.uam.es:10486/717799 |
| Acceso en línea: | http://hdl.handle.net/10486/717799 https://dx.doi.org/10.1016/j.ceja.2021.100090 |
| Access Level: | acceso abierto |
| Palabra clave: | Contaminants of emerging concern CWPO graphite UV-A Química |
| Sumario: | Ibuprofen (IBU) and Diclofenac (DCF) are two of the most common non-steroidal anti-inflammatory drugs used worldwide. Their occurrence in natural streams, as contaminants of emerging concern, evidences the inefficiency of conventional wastewater treatment plants for their removal. The photocatalytic methods developed so far usually demand either highly energetic light sources working in the UV-C range, or exclusive tailor-made catalysts, which compromise the economy of the process. In this work, IBU and DCF degradation are addressed in a UV-A LED (395 nm) assisted Catalytic Wet Peroxide Oxidation process using graphite as catalyst. Total IBU and DCF removal is achieved in t < 60 min working at [IBU or DCF]0: 20 µM, [H2O2]0: 800 µM, [Graphite]: 1 g · L−1 and pH0:3.0, with a 53% TOC removal and ECTOC: 31.0 kWh gTOC−1. Results show a high influence of the interaction between the graphite's surface and H2O2, which enables pollutant adsorption as first step in the oxidation reaction. Further redox reactions on the |
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