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Título
Optimizing the composition of bioactive coatings to support toluene removal
Año del Documento
2025
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Journal of Environmental Chemical Engineering, 2025, vol. 13, n. 4, p. 117324
Resumen
The potential of bioactive coatings as an innovative biotechnology to overcome the mass-transfer limitations of conventional technologies when treating air pollutants, especially hydrophobic volatile organic compounds, was herein assessed. Bioactive coatings consist of active microorganisms entrapped in a polymer matrix, which needs to be porous to facilitate an effective gas pollutant exchange. To increase porosity, two additives, sucrose and glycerol mixtures (Suc/Gly) and halloysite nanotubes (HNTs), were included in the bioactive coatings at two concentration levels. The toluene removals of the different bioactive coatings were studied in batch mode at low (∼300 mg m−3) and high (∼3000 mg m−3) toluene concentrations. Overall, low HNTs concentration coatings supported optimum toluene removals (>95 %), comparable to biofilm controls at both toluene concentrations. High HNTs concentration coatings and low Suc/Gly concentration coatings achieved toluene removals over 95 % after 7 toluene injections at low toluene concentration. At high toluene concentrations, these coatings eventually outperformed the biofilm controls. High Suc/Gly concentration coatings supported a limited toluene removal (4 and 1 injection at low and high toluene concentrations, respectively), attributed to a preferential consumption of sucrose over toluene. These findings were corroborated by ESEM/conventional SEM imaging, revealing porosity in the HNTs bioactive coatings, visible at both the surface and internal levels. On the contrary, more homogeneous surfaces were observed in the Suc/Gly bioactive coatings, where total polymer coalescence was partially hindered by the addition of Suc/Gly. These results paved the way towards the implementation of bioactive coating in larger bioreactors for real-life air purification.
Materias Unesco
3302 Tecnología Bioquímica
ISSN
2213-3437
Revisión por pares
SI
Patrocinador
Ministerio de Ciencia, Innovación y Universidades [proyecto RTI2018–0–096441-B-I00]
Junta de Castilla y León y al programa FEDER de la UE [UIC 393, UIC 379]
Junta de Castilla y León (Consejería de Educación) y del Fondo Social Europeo (BDNS 487971)
Junta de Castilla y León y al programa FEDER de la UE [UIC 393, UIC 379]
Junta de Castilla y León (Consejería de Educación) y del Fondo Social Europeo (BDNS 487971)
Version del Editor
Propietario de los Derechos
© 2025 The Author(s)
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
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