Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure
Abstract Engineered nanomaterials (ENM) are utilized and produced during many engineering processes. However, they may generate airborne nanoparticles during different phases of their life cycles. TiO2, which is known for its photocatalytic properties, especially in terms of degrading NO2, is one of...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2021-04-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.200612 |
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| _version_ | 1823862885842944000 |
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| author | Ali Mohamadi Nasrabadi Ana Maria Todea Carmen Wolf Tolga Demirel David Habryka Christof Asbach |
| author_facet | Ali Mohamadi Nasrabadi Ana Maria Todea Carmen Wolf Tolga Demirel David Habryka Christof Asbach |
| author_sort | Ali Mohamadi Nasrabadi |
| collection | DOAJ |
| description | Abstract Engineered nanomaterials (ENM) are utilized and produced during many engineering processes. However, they may generate airborne nanoparticles during different phases of their life cycles. TiO2, which is known for its photocatalytic properties, especially in terms of degrading NO2, is one of the most widely produced ENM. Ambient NO2 stems mainly from vehicular and industrial combustion processes and potentially harms human health upon inhalation. This study investigated the photocatalytic reduction of NO2 due to varying concentrations of aerosolized TiO2 nanoparticles during varying levels of ultraviolet A (UVA) exposure. Additionally, we evaluated the effects of low (5%), moderate (35%), and high (70%) relative humidity. Our results demonstrated that the decrease in NO2 depended on both the TiO2 concentration and the UVA intensity. However, when the former was high (> 3.23E+06 cm–3), the contribution of the latter was negligible. On the other hand, when the latter was high, the influence of the former was minimal. Furthermore, as the UVA exposure increased in duration, its effect became dominant over that of the TiO2 concentration. Finally, we found the relative humidity to be an insignificant factor during conditions with strong UVA (6328 W s m–2). |
| format | Article |
| id | doaj-art-4ca060e53c0247da84bbd2f2e9535775 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2021-04-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-4ca060e53c0247da84bbd2f2e95357752025-02-09T12:19:51ZengSpringerAerosol and Air Quality Research1680-85842071-14092021-04-0121611410.4209/aaqr.200612Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA ExposureAli Mohamadi Nasrabadi0Ana Maria Todea1Carmen Wolf2Tolga Demirel3David Habryka4Christof Asbach5Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Air Quality & Filtration Unit, Institute of Energy and Environmental Technology e. V. (IUTA)Abstract Engineered nanomaterials (ENM) are utilized and produced during many engineering processes. However, they may generate airborne nanoparticles during different phases of their life cycles. TiO2, which is known for its photocatalytic properties, especially in terms of degrading NO2, is one of the most widely produced ENM. Ambient NO2 stems mainly from vehicular and industrial combustion processes and potentially harms human health upon inhalation. This study investigated the photocatalytic reduction of NO2 due to varying concentrations of aerosolized TiO2 nanoparticles during varying levels of ultraviolet A (UVA) exposure. Additionally, we evaluated the effects of low (5%), moderate (35%), and high (70%) relative humidity. Our results demonstrated that the decrease in NO2 depended on both the TiO2 concentration and the UVA intensity. However, when the former was high (> 3.23E+06 cm–3), the contribution of the latter was negligible. On the other hand, when the latter was high, the influence of the former was minimal. Furthermore, as the UVA exposure increased in duration, its effect became dominant over that of the TiO2 concentration. Finally, we found the relative humidity to be an insignificant factor during conditions with strong UVA (6328 W s m–2).https://doi.org/10.4209/aaqr.200612TiO2 aerosolized nanoparticlesNO2 reductionUVA exposureUptake coefficient |
| spellingShingle | Ali Mohamadi Nasrabadi Ana Maria Todea Carmen Wolf Tolga Demirel David Habryka Christof Asbach Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure Aerosol and Air Quality Research TiO2 aerosolized nanoparticles NO2 reduction UVA exposure Uptake coefficient |
| title | Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure |
| title_full | Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure |
| title_fullStr | Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure |
| title_full_unstemmed | Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure |
| title_short | Investigation of the Effect of Aerosolized TiO2 Nanoparticles on the NO2 Concentrations under UVA Exposure |
| title_sort | investigation of the effect of aerosolized tio2 nanoparticles on the no2 concentrations under uva exposure |
| topic | TiO2 aerosolized nanoparticles NO2 reduction UVA exposure Uptake coefficient |
| url | https://doi.org/10.4209/aaqr.200612 |
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