Fenton and Photo-Fenton Nanocatalysts Revisited from the Perspective of Life Cycle Assessment
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Título: | Fenton and Photo-Fenton Nanocatalysts Revisited from the Perspective of Life Cycle Assessment |
Autor/a: | Feijoo Moreira, Sara González Rodríguez, Jorge Fernández Fernández, Lucía Vázquez Vázquez, Carlos Feijoo Costa, Gumersindo Moreira Vilar, María Teresa |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Enxeñaría Química Universidade de Santiago de Compostela. Departamento de Química Física Universidade de Santiago de Compostela. Instituto Interdisciplinar de Tecnoloxías Ambientais (CRETUS) |
Palabras chave: | LCA | Environmental impact | Fenton | Photocatalysis | Visible light | SBA15 | Magnetite | |
Data: | 2020 |
Editor: | MDPI |
Cita bibliográfica: | Feijoo, S.; González-Rodríguez, J.; Fernández, L.; Vázquez-Vázquez, C.; Feijoo, G.; Moreira, M.T. Fenton and Photo-Fenton Nanocatalysts Revisited from the Perspective of Life Cycle Assessment. Catalysts 2020, 10, 23 |
Resumo: | This study provides an overview of the environmental impacts associated with the production of different magnetic nanoparticles (NPs) based on magnetite (Fe3O4), with a potential use as heterogeneous Fenton or photo-Fenton catalysts in wastewater treatment applications. The tendency of Fe3O4 NPs to form aggregates in water makes necessary their decoration with stabilizing agents, in order to increase their catalytic activity. Different stabilizing agents were considered in this study: poly(acrylic acid) (PAA), polyethylenimine (PEI) and silica (SiO2), as well as the immobilization of the magnetite-based catalysts in a mesoporous silica matrix, SBA-15. In the case of photo-Fenton catalysts, combinations of magnetite NPs with semiconductors were evaluated, so that magnetic recovery of the nanomaterials is possible, thus allowing a safe discharge free of NPs. The results of this study suggest that magnetic nanoparticles coated with PEI or PAA were the most suitable option for their applications in heterogeneous Fenton processes, while ZnO-Fe3O4 NPs provided an interesting approach in photo-Fenton. This work showed the importance of identifying the relevance of nanoparticle production strategy in the environmental impacts associated with their use |
Versión do editor: | https://doi.org/10.3390/catal10010023 |
URI: | http://hdl.handle.net/10347/21903 |
DOI: | 10.3390/catal10010023 |
E-ISSN: | 2073-4344 |
Dereitos: | © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/) |
Coleccións
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