2026-04-27T13:49:35Zhttps://uvadoc.uva.es/oai/request

oai:uvadoc.uva.es:10324/769602025-12-03T08:00:34Zcom_10324_35294com_10324_952com_10324_894col_10324_35295

González Martín, Javier Campo, Aránzazu del Muñoz Torre, Raúl Lebrero Fernández, Raquel 2025 Producción Científica 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. application/pdf https://uvadoc.uva.es/handle/10324/76960 eng Elsevier 3302 Tecnología Bioquímica Optimizing the composition of bioactive coatings to support toluene removal info:eu-repo/semantics/article TEXT UVaDOC. Repositorio Documental de la Universidad de Valladolid Hispana