Awareness is growing about the risk associated with poor indoor air quality in buildings (homes, offices, gyms...) caused by various emission sources such as: solvents, household detergents, alcohol, insecticides, paints and surface coatings. In particular, we focused on the pollution produced by methanol, a substance belonging to the category of volatile organic compounds (VOC). Methanol, which is toxic to humans, derives from a wide range of processes: from the decomposition of organic matter, from the biological decomposition of biological waste, from wastewater and sludge, constituting a health hazard. Among the many techniques proposed for the abatement of gaseous pollutants, advanced oxidative processes have been distinguished that generate highly reactive chemical species that can be used to degrade target molecules. The technique used is heterogeneous photocatalysis, which is one of the most effective air treatment technologies and has demonstrated high efficiency in degrading organic contaminants. A special catalyst, supported by a membrane, is added to the system, which is in a different phase than the target species. The reactions take place in the presence of UV light, which is necessary for the activation of the catalyst itself.
Sta crescendo la consapevolezza in merito al rischio associato alla scarsa qualità dell'aria interna agli edifici(case, uffici, palestre..) provocato da diverse fonti di emissione quali: solventi, detergenti per la casa, alcol, insetticidi, pitture e verniciature di superfici. In particolare ci siamo soffernati sull'inquinamento prodotto da metanolo, sostanza facente parte della categoria dei composti organici volatili chimici(VOC). Il metanolo, tossico per l'essere umano, deriva da un'ampia gamma di processi: dalla decomposizione della materia organica, dalla decomposizione biologica dei rifiuti biologici, dalle acque reflue e dai fanghi costituendo un pericolo per la salute. Tra le numerose tecniche proposte per l'abbattimento degli inquinanti gassosi, si sono distinti processi ossidativi avanzati che generano specie chimiche altamente reattive che possono essere utilizzate per degradare le molecole bersaglio. La tecnica utilizzata è la fotocatalisi eterogenea, che è una delle tecnologie di trattamento dell'aria più efficaci e ha dimostrato un'elevata efficienza nella degradazione dei contaminanti organici. Al sistema viene aggiunto un catalizzatore particolare, sopportato da una membrana, che si trova in una fase diversa rispetto alle specie bersaglio. Le reazioni si svolgono in presenza di luce UV, necessaria per l’attivazione del catalizzatore stesso.
Membrane nanostrutturate per applicazioni ambientali: ottimizzazione di processo e valutazione delle performance
STURARO, NICOLE
2021/2022
Abstract
Awareness is growing about the risk associated with poor indoor air quality in buildings (homes, offices, gyms...) caused by various emission sources such as: solvents, household detergents, alcohol, insecticides, paints and surface coatings. In particular, we focused on the pollution produced by methanol, a substance belonging to the category of volatile organic compounds (VOC). Methanol, which is toxic to humans, derives from a wide range of processes: from the decomposition of organic matter, from the biological decomposition of biological waste, from wastewater and sludge, constituting a health hazard. Among the many techniques proposed for the abatement of gaseous pollutants, advanced oxidative processes have been distinguished that generate highly reactive chemical species that can be used to degrade target molecules. The technique used is heterogeneous photocatalysis, which is one of the most effective air treatment technologies and has demonstrated high efficiency in degrading organic contaminants. A special catalyst, supported by a membrane, is added to the system, which is in a different phase than the target species. The reactions take place in the presence of UV light, which is necessary for the activation of the catalyst itself.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/34777