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Titel: Optimizing the Composition of Bioactive Coatings to Support Toluene Removal
VerfasserIn: González-Martín, Javier
del Campo Bécares, Aránzazu
Munoz, Raul
Lebrero, Raquel
Sprache: Englisch
Verlag/Plattform: Social Science Research Network
Erscheinungsjahr: 2024
Freie Schlagwörter: Bioactive coating
biofilm
Gas treatment
HNT
Latex
VOCs
DDC-Sachgruppe: 540 Chemie
Dokumenttyp: Sonstiges
Abstract: The potential of bioactive coatings as an innovative biotechnology to overcome the mass-transfer limitations of conventional technologies when treating indoor air pollutants, especially hydrophobic volatile organic compounds (VOCs), was herein assessed. Bioactive coatings consist of active microorganisms entrapped in a polymer matrix, which needs to be porous to facilitate effective gas pollutant and nutrient 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 removal performance of the different bioactive coatings was 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, comparable to biofilm controls at both toluene concentrations. High HNTs concentration coatings and low Suc/Gly concentration coatings achieved good toluene removals, especially when supplemented at 300 mg m-3, eventually outperforming biofilm controls at the end of high toluene concentration experiments. High Suc/Gly concentration supported a limited toluene removal in both experiments, which was attributed to a preferential consumption of sucrose over toluene. These findings were corroborated by ESEM/conventional SEM imaging, revealing a certain degree of 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 indoor air purification.
DOI der Erstveröffentlichung: 10.2139/ssrn.4988634
URL der Erstveröffentlichung: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4988634
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-436696
hdl:20.500.11880/39131
http://dx.doi.org/10.22028/D291-43669
Datum des Eintrags: 6-Dez-2024
Bemerkung/Hinweis: Preprint
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Aránzazu del Campo
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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