Metal-free abatement of nitrate contaminant from water using a conducting polymer
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Título: | Metal-free abatement of nitrate contaminant from water using a conducting polymer |
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Autor/es: | Villora-Picó, Juan José | García Fernández, María Jesús | Sepúlveda-Escribano, Antonio | Pastor-Blas, M. Mercedes |
Grupo/s de investigación o GITE: | Materiales Avanzados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Palabras clave: | Polypyrrole | Nitrate reduction | Metal-free | Formic acid | Plasma treatment |
Área/s de conocimiento: | Química Inorgánica |
Fecha de publicación: | 1-ene-2021 |
Editor: | Elsevier |
Cita bibliográfica: | Chemical Engineering Journal. 2021, 403: 126228. https://doi.org/10.1016/j.cej.2020.126228 |
Resumen: | A mechanism for the reduction of aqueous nitrate with metal-free polypyrrole (PPy) is proposed. The activity and selectivity of the polymer has been compared to those of metal catalysts supported on polypyrrole, activated carbon or titania (TiO2). The role of formic acid (FA) and hydrogen (H2) as reductants, and carbon dioxide (CO2) as buffer of the aqueous nitrate solution is discussed and compared to the performance of PPy by itself. The ion-exchange and the redox properties of PPy are strongly affected by the oxidation state of the nitrogen moieties in the polymeric chain. This is determined by the oxidant/dopant used in the polymer synthesis (FeCl3 or K2S2O8). The degree of oxidation of PPy can also be modified by a plasma treatment of the polymer, which determines the ability of PPy to carry out the reduction of nitrate by the electrons provided by the polymeric chain and also affects the selectivity of the nitrate reduction. |
Patrocinador/es: | Financial support from Generalitat Valenciana, Spain (PROMETEOII/2014/004) and Ministry of Economy and Competitiveness (MAT2016-80285-P) is gratefully acknowledged. |
URI: | http://hdl.handle.net/10045/108345 |
ISSN: | 1385-8947 (Print) | 1873-3212 (Online) |
DOI: | 10.1016/j.cej.2020.126228 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2020 Elsevier B.V. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.1016/j.cej.2020.126228 |
Aparece en las colecciones: | INV - LMA - Artículos de Revistas |
Archivos en este ítem:
Archivo | Descripción | Tamaño | Formato | |
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Villora-Pico_etal_2021_ChemEngJ_final.pdf | Versión final (acceso restringido) | 2,06 MB | Adobe PDF | Abrir Solicitar una copia |
Villora-Pico_etal_2021_ChemEngJ_revised.pdf | Versión revisada (acceso abierto) | 1,81 MB | Adobe PDF | Abrir Vista previa |
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