Marina Flores, Claudio Passalía, Marisol Daniela Labas, Rodolfo Juan Brandi
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引用次数: 0
Abstract
Airborne microorganisms can cause various adverse effects, including infectious, allergic, and immunotoxic diseases. Bioaerosols are also one of the main causes of morbidity and mortality, as well as a heavy burden on health costs. The present study models and compares the inactivation performance of three commercial air filters, industrial and domestic use (vacuum cleaner) with and without catalyst (TiO2) deposition for a model microorganism under UVA radiation. The filters were studied regarding catalysis load, adherence, optical properties, morphology, and cost. The microorganism used was E. coli, it was distributed emulating Flügge droplets on coated and uncoated filters and then exposed to UVA radiation at different humidity conditions. Different methods of bacterial spreading and counting on filters were tested. A simple kinetic model was proposed and validated to compare the inactivation performances of photocatalysis and photolysis; the modeling results enabled the prediction of inactivation efficiency and analysis of several parameters. To compare the photocatalytic activity of the functionalized filters we calculated D90, the dose to reduce one bacterial log, and a pseudo-constant of the inactivation rate per unit mass of catalyst deposited. Our experimental findings of TiO2-coated fiberglass filters presented in this study suggest that scaling up and its subsequent development in ventilation systems would be successful.
期刊介绍:
Air Quality, Atmosphere, and Health is a multidisciplinary journal which, by its very name, illustrates the broad range of work it publishes and which focuses on atmospheric consequences of human activities and their implications for human and ecological health.
It offers research papers, critical literature reviews and commentaries, as well as special issues devoted to topical subjects or themes.
International in scope, the journal presents papers that inform and stimulate a global readership, as the topic addressed are global in their import. Consequently, we do not encourage submission of papers involving local data that relate to local problems. Unless they demonstrate wide applicability, these are better submitted to national or regional journals.
Air Quality, Atmosphere & Health addresses such topics as acid precipitation; airborne particulate matter; air quality monitoring and management; exposure assessment; risk assessment; indoor air quality; atmospheric chemistry; atmospheric modeling and prediction; air pollution climatology; climate change and air quality; air pollution measurement; atmospheric impact assessment; forest-fire emissions; atmospheric science; greenhouse gases; health and ecological effects; clean air technology; regional and global change and satellite measurements.
This journal benefits a diverse audience of researchers, public health officials and policy makers addressing problems that call for solutions based in evidence from atmospheric and exposure assessment scientists, epidemiologists, and risk assessors. Publication in the journal affords the opportunity to reach beyond defined disciplinary niches to this broader readership.